公开(公告)号：US20150227095A1

公开(公告)日：2015-08-13

申请号：US14693550

申请日：2015-04-22

申请人： Takeshi UCHITANI ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Takahiro IMADA ,  Hiromasa TAKAGI ,  Hiroshi YOSHINAGA ,  Arinobu YOSHIURA ,  Teppei KAWATA ,  Takamasa HASE ,  Hajime GOTOH ,  Takuya SESHITA ,  Kazuya SAITO ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Shuutaroh YUASA ,  Akira SUZUKI ,  Shinichi NAMEKATA ,  Ryota YAMASHINA ,  Yasunori ISHIGAYA

发明人： Takeshi UCHITANI ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Takahiro IMADA ,  Hiromasa TAKAGI ,  Hiroshi YOSHINAGA ,  Arinobu YOSHIURA ,  Teppei KAWATA ,  Takamasa HASE ,  Hajime GOTOH ,  Takuya SESHITA ,  Kazuya SAITO ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Shuutaroh YUASA ,  Akira SUZUKI ,  Shinichi NAMEKATA ,  Ryota YAMASHINA ,  Yasunori ISHIGAYA

IPC分类号： G03G15/20

CPC分类号： G03G15/2039 ,  G03G15/205 ,  G03G2215/2035

摘要： A fixing device capable of shifting to a sleep state includes a heat source; a rotatable fixing member that is partly heated by the heat source to heat an unfixed image carrying surface of a recording medium; a rotatable pressing member that is in pressure contact with the fixing member to form a nip portion between the pressing member and the fixing member; a rotation drive unit that directly or indirectly rotates the fixing member; a temperature detecting unit that detects a temperature of the fixing member; and a controller configured to prohibit the fixing device from shifting to the sleep state when the temperature of the fixing member in a region facing the heat source is equal to or more than a predetermined temperature T1 at a point when a predetermined time period t1 has elapsed from the stop of rotation drive of the rotation drive unit.

摘要翻译： 能够转移到睡眠状态的固定装置包括热源; 可旋转的固定构件，其被热源部分地加热以加热记录介质的未固定的图像承载表面; 与所述固定部件压力接触以在所述按压部件和所述固定部件之间形成夹持部的旋转按压部件; 旋转驱动单元，其直接或间接地旋转所述固定构件; 温度检测单元，其检测所述固定构件的温度; 以及控制器，被配置为当经过预定时间段t1的时刻，当面向热源的区域中的固定构件的温度等于或大于预定温度T1时，禁止定影装置转移到睡眠状态 从旋转驱动单元的旋转驱动停止。

公开(公告)号：US20160098003A1

公开(公告)日：2016-04-07

申请号：US14966911

申请日：2015-12-11

申请人： Takeshi UCHITANI ,  Masahiko SATOH ,  Kenji ISHII ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Takamasa HASE ,  Shuutaroh YUASA ,  Masaaki YOSHIKAWA ,  Hiromasa TAKAGI ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Takuya SESHITA ,  Hiroshi YOSHINAGA ,  Kazuya SAITO ,  Shinichi NAMEKATA ,  Takayuki SEKI ,  Yuji ARAI ,  Ryuuichi MIMBU ,  Yoshiki YAMAGUCHI ,  Shuntaroh TAMAKI ,  Yutaka IKEBUCHI

发明人： Takeshi UCHITANI ,  Masahiko SATOH ,  Kenji ISHII ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Takamasa HASE ,  Shuutaroh YUASA ,  Masaaki YOSHIKAWA ,  Hiromasa TAKAGI ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Takuya SESHITA ,  Hiroshi YOSHINAGA ,  Kazuya SAITO ,  Shinichi NAMEKATA ,  Takayuki SEKI ,  Yuji ARAI ,  Ryuuichi MIMBU ,  Yoshiki YAMAGUCHI ,  Shuntaroh TAMAKI ,  Yutaka IKEBUCHI

IPC分类号： G03G15/20

CPC分类号： G03G15/2064 ,  G03G15/2039 ,  G03G15/205 ,  G03G2215/2035

摘要： A fixing device includes a heat source; a fixing member looped into a generally cylindrical shape to rotate in a circumferential direction thereof and partially heated by the heat source and to heat a surface of a recording medium bearing an unfixed toner image to fix the unfixed toner image thereon in a fixing process; a rotary pressing member disposed facing the fixing member to form a nip therebetween, through which the recording medium is transported in a transport direction; and a rotation driver to rotate one of the fixing member and the pressing member. In a case in which the fixing member is halted for a reason other than the fixing process while power of the fixing device is on, electric power is not supplied to the heat source and the fixing member is rotated by a predetermined amount or more after the fixing member is halted.

公开(公告)号：US20170277091A1

公开(公告)日：2017-09-28

申请号：US15618819

申请日：2017-06-09

申请人： Takeshi UCHITANI ,  Masahiko SATOH ,  Kenji ISHII ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Takamasa HASE ,  Shuutaroh YUASA ,  Masaaki YOSHIKAWA ,  Hiromasa TAKAGI ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Takuya SESHITA ,  Hiroshi YOSHINAGA ,  Kazuya SAITO ,  Shinichi NAMEKATA ,  Takayuki SEKI ,  Yuji ARAI ,  Ryuuichi MIMBU ,  Yoshiki YAMAGUCHI ,  Shuntaroh TAMAKI ,  Yutaka IKEBUCHI

发明人： Takeshi UCHITANI ,  Masahiko SATOH ,  Kenji ISHII ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Takamasa HASE ,  Shuutaroh YUASA ,  Masaaki YOSHIKAWA ,  Hiromasa TAKAGI ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Takuya SESHITA ,  Hiroshi YOSHINAGA ,  Kazuya SAITO ,  Shinichi NAMEKATA ,  Takayuki SEKI ,  Yuji ARAI ,  Ryuuichi MIMBU ,  Yoshiki YAMAGUCHI ,  Shuntaroh TAMAKI ,  Yutaka IKEBUCHI

IPC分类号： G03G15/20

CPC分类号： G03G15/2064 ,  G03G15/2039 ,  G03G15/205 ,  G03G2215/2035

摘要： A fixing device includes a heat source; a fixing member looped into a generally cylindrical shape to rotate in a circumferential direction thereof and partially heated by the heat source and to heat a surface of a recording medium bearing an unfixed toner image to fix the unfixed toner image thereon in a fixing process; a rotary pressing member disposed facing the fixing member to form a nip therebetween, through which the recording medium is transported in a transport direction; and a rotation driver to rotate one of the fixing member and the pressing member. In a case in which the fixing member is halted for a reason other than the fixing process while power of the fixing device is on, electric power is not supplied to the heat source and the fixing member is rotated by a predetermined amount or more after the fixing member is halted.

公开(公告)号：US20130209119A1

公开(公告)日：2013-08-15

申请号：US13747906

申请日：2013-01-23

申请人： Shuutaroh YUASA ,  Takeshi UCHITANI ,  Takamasa HASE ,  Takuya SESHITA ,  Hiroshi YOSHINAGA ,  Kenji ISHII ,  Tadashi OGAWA ,  Arinobu YOSHIURA ,  Teppei KAWATA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Masaaki YOSHIKAWA ,  Masahiko SATOH ,  Hiromasa TAKAGI ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Shinichi NAMEKATA ,  Kazuya SAITO

发明人： Shuutaroh YUASA ,  Takeshi UCHITANI ,  Takamasa HASE ,  Takuya SESHITA ,  Hiroshi YOSHINAGA ,  Kenji ISHII ,  Tadashi OGAWA ,  Arinobu YOSHIURA ,  Teppei KAWATA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Masaaki YOSHIKAWA ,  Masahiko SATOH ,  Hiromasa TAKAGI ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI ,  Shinichi NAMEKATA ,  Kazuya SAITO

IPC分类号： G03G15/20

CPC分类号： G03G15/2064 ,  G03G15/205 ,  G03G2215/2035

摘要： A fixing device includes a controller connected to a heater and at least one of a pressing rotary body and an endless rotary body. The controller performs a first fixing operation, a first transition operation, a second fixing operation, and a second transition operation. The first fixing operation fixes a toner image on a first recording medium after the fixing device is powered on. The first transition operation rotates the pressing rotary body and the endless rotary body while controlling the heater to maintain the endless rotary body at a predetermined temperature for a first duration time. The second fixing operation fixes a toner image on a second recording medium. The second transition operation rotates the pressing rotary body and the endless rotary body while controlling the heater to maintain the endless rotary body at the predetermined temperature for a second duration time smaller than the first duration time.

摘要翻译： 定影装置包括连接到加热器和压紧旋转体和环形旋转体中的至少一个的控制器。 控制器执行第一定影操作，第一转换操作，第二定影操作和第二转换操作。 第一固定操作在定影装置通电之后将调色剂图像定影在第一记录介质上。 第一过渡操作使加压旋转体和环形旋转体一起旋转，同时控制加热器，以将永久旋转体保持在预定温度下持续第一持续时间。 第二定影操作将调色剂图像固定在第二记录介质上。 第二过渡操作在控制加热器的同时使压制旋转体和环形旋转体旋转，将环形旋转体保持在预定温度下，持续时间小于第一持续时间。

公开(公告)号：US20170255150A1

公开(公告)日：2017-09-07

申请号：US15602720

申请日：2017-05-23

申请人： Takamasa HASE ,  Masahiko SATOH ,  Shinichi NAMEKATA ,  Kenji ISHll ,  Takeshi UCHITANI ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Kazuya SAITO ,  Toshihiko SHIMOKAWA ,  Shuutaroh YUASA ,  Kensuke YAMAJI ,  Masaaki YOSHIKAWA ,  Hiroshi YOSHINAGA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takuya SESHITA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI

发明人： Takamasa HASE ,  Masahiko SATOH ,  Shinichi NAMEKATA ,  Kenji ISHll ,  Takeshi UCHITANI ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Kazuya SAITO ,  Toshihiko SHIMOKAWA ,  Shuutaroh YUASA ,  Kensuke YAMAJI ,  Masaaki YOSHIKAWA ,  Hiroshi YOSHINAGA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takuya SESHITA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI

IPC分类号： G03G15/20 ,  G03G15/00

CPC分类号： G03G15/2028 ,  G03G15/2039 ,  G03G15/205 ,  G03G15/55

摘要： An image forming apparatus includes a fixing device. The fixing device includes a rotatable endless fixing member, a nip forming member arranged inside the fixing member, a pressing member in contact with the nip forming member via the fixing member, and a heating source configured to heat the fixing member. When an abnormality occurs in at least one of the fixing device and other devices included in the image forming apparatus, a rotation of the fixing member is stopped prior to stopping a rotation driving of a discharging unit and, after stopping, the fixing member is controlled to rotate.

公开(公告)号：US20160054691A1

公开(公告)日：2016-02-25

申请号：US14928757

申请日：2015-10-30

申请人： Takamasa HASE ,  Masahiko SATOH ,  Shinichi NAMEKATA ,  Kenji ISHll ,  Takeshi UCHITANI ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Kazuya SAITO ,  Toshihiko SHIMOKAWA ,  Shuutaroh YUASA ,  Kensuke YAMAJI ,  Masaaki YOSHIKAWA ,  Hiroshi YOSHINAGA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takuya SESHITA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI

发明人： Takamasa HASE ,  Masahiko SATOH ,  Shinichi NAMEKATA ,  Kenji ISHll ,  Takeshi UCHITANI ,  Tadashi OGAWA ,  Teppei KAWATA ,  Arinobu YOSHIURA ,  Kazuya SAITO ,  Toshihiko SHIMOKAWA ,  Shuutaroh YUASA ,  Kensuke YAMAJI ,  Masaaki YOSHIKAWA ,  Hiroshi YOSHINAGA ,  Hiromasa TAKAGI ,  Naoki IWAYA ,  Takuya SESHITA ,  Takahiro IMADA ,  Hajime GOTOH ,  Akira SUZUKI

IPC分类号： G03G15/20

CPC分类号： G03G15/2028 ,  G03G15/2039 ,  G03G15/205 ,  G03G15/55

摘要： An image forming apparatus includes a fixing device. The fixing device includes a rotatable endless fixing member, a nip forming member arranged inside the fixing member, a pressing member in contact with the nip forming member via the fixing member, and a heating source configured to heat the fixing member. When an abnormality occurs in at least one of the fixing device and other devices included in the image forming apparatus, a rotation of the fixing member is stopped prior to stopping a rotation driving of a discharging unit and, after stopping, the fixing member is controlled to rotate.

公开(公告)号：US20130209125A1

公开(公告)日：2013-08-15

申请号：US13751922

申请日：2013-01-28

申请人： Takeshi UCHITANI ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Takahiro IMADA ,  Hiromasa TAKAGI ,  Kazuya SAITO ,  Naoki IWAYA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Teppei KAWATA ,  Takamasa HASE ,  Takuya SESHITA ,  Shuutaroh YUASA ,  Arinobu YOSHIURA ,  Hajime GOTOH ,  Akira SUZUKI ,  Hiroshi YOSHINAGA

发明人： Takeshi UCHITANI ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Takahiro IMADA ,  Hiromasa TAKAGI ,  Kazuya SAITO ,  Naoki IWAYA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Teppei KAWATA ,  Takamasa HASE ,  Takuya SESHITA ,  Shuutaroh YUASA ,  Arinobu YOSHIURA ,  Hajime GOTOH ,  Akira SUZUKI ,  Hiroshi YOSHINAGA

IPC分类号： G03G15/20

CPC分类号： G03G15/2078 ,  G03G15/2039 ,  G03G15/2042 ,  G03G2215/2035

摘要： A fixing device for fixing an unfixed image onto a recording medium includes a fixing belt, a nip forming member, an opposing rotary member, a heater, and a temperature detector. The fixing belt is formed into a loop to move endlessly and fix the unfixed image on the recording medium. The nip forming member is disposed inside the loop formed by the fixing belt. The opposing rotary member contacts the nip forming member via the fixing belt to form a nip portion therebetween while rotating. The heater heats the fixing belt at a place other than the nip portion. The temperature detector detects a temperature of the surface of the fixing belt. The temperature detector detects the temperature near a place of the fixing belt that easily deforms as the fixing belt is heated by the heater.

摘要翻译： 用于将未定影图像固定到记录介质上的定影装置包括定影带，辊隙形成构件，相对旋转构件，加热器和温度检测器。 将定影带形成为环状以循环移动并将未定影图像固定在记录介质上。 辊隙形成构件设置在由定影带形成的环内。 相对的旋转构件经由定影带与辊隙形成构件接触，在旋转的同时在其间形成夹持部。 加热器将定影带加热到夹持部以外的位置。 温度检测器检测定影带的表面的温度。 温度检测器检测定影带靠近加热器加热定影带时容易变形的位置附近的温度。

公开(公告)号：US20130177340A1

公开(公告)日：2013-07-11

申请号：US13677597

申请日：2012-11-15

申请人： Teppei KAWATA ,  Masahiko Satoh ,  Masaaki Yoshikawa ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Tadashi Ogawa ,  Takahiro Imada ,  Hiromasa Takagi ,  Kazuya Saito ,  Naoki Iwaya ,  Kensuke Yamaji ,  Takamasa Hase ,  Toshihiko Shimokawa ,  Shuutaroh Yuasa ,  Takuya Seshita ,  Takeshi Uchitani ,  Arinobu Yoshiura ,  Hajime Gotoh ,  Akira Suzuki

发明人： Teppei KAWATA ,  Masahiko Satoh ,  Masaaki Yoshikawa ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Tadashi Ogawa ,  Takahiro Imada ,  Hiromasa Takagi ,  Kazuya Saito ,  Naoki Iwaya ,  Kensuke Yamaji ,  Takamasa Hase ,  Toshihiko Shimokawa ,  Shuutaroh Yuasa ,  Takuya Seshita ,  Takeshi Uchitani ,  Arinobu Yoshiura ,  Hajime Gotoh ,  Akira Suzuki

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2064 ,  G03G2215/2035

摘要： A fixing device includes an endless belt rotatable in a predetermined direction of rotation and a nip formation assembly disposed opposite an inner circumferential surface of the endless belt. An opposed rotary body is pressed against the nip formation assembly via the endless belt to form a fixing nip between the endless belt and the opposed rotary body through which a recording medium bearing a toner image is conveyed. A belt holder contacts and supports each lateral end of the endless belt in an axial direction thereof. The belt holder is isolated from the opposed rotary body with a first interval interposed therebetween in the axial direction of the endless belt.

公开(公告)号：US20130170880A1

公开(公告)日：2013-07-04

申请号：US13692389

申请日：2012-12-03

申请人： Hajime GOTOH ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Takahiro IMADA ,  Hiromasa TAKAGI ,  Kazuya SAITO ,  Naoki IWAYA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Teppei KAWATA ,  Takamasa HASE ,  Shuutaroh YUASA ,  Takuya SESHITA ,  Takeshi UCHITANI ,  Arinobu YOSHIURA ,  Akira SUZUKI ,  Hiroshi YOSHINAGA

发明人： Hajime GOTOH ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Tadashi OGAWA ,  Takahiro IMADA ,  Hiromasa TAKAGI ,  Kazuya SAITO ,  Naoki IWAYA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Teppei KAWATA ,  Takamasa HASE ,  Shuutaroh YUASA ,  Takuya SESHITA ,  Takeshi UCHITANI ,  Arinobu YOSHIURA ,  Akira SUZUKI ,  Hiroshi YOSHINAGA

IPC分类号： G03G15/20

CPC分类号： G03G15/2064 ,  G03G15/2053 ,  G03G2215/2035

摘要： The fixing device includes a nip formation assembly partially pressing against an opposed rotary body via an endless belt to form a fixing nip between the endless belt and the opposed rotary body. The nip formation assembly includes a base pad defining the fixing nip and including a pressure portion, an extension portion, and a curved portion. The pressure portion presses against the opposed rotary body via the endless belt. The extension portion is contiguous to and disposed upstream from the pressure portion in a recording medium conveyance direction. The extension portion does not press against the opposed rotary body via the endless belt. The curved portion is disposed upstream from the extension portion in the recording medium conveyance direction and smoothly blends into the extension portion. The curved portion does not press against the opposed rotary body.

摘要翻译： 定影装置包括经由环形带部分地压靠在相对的旋转体上的辊隙形成组件，以在环形带和相对的旋转体之间形成定影辊隙。 压区形成组件包括限定定影辊隙的基座，包括压力部分，延伸部分和弯曲部分。 压力部分通过环形带压靠在相对的旋转体上。 延伸部分在记录介质输送方向上与压力部分邻接并设置在上游。 延伸部不经由环形带压靠在相对的旋转体上。 弯曲部分在记录介质输送方向上设置在延伸部分的上游，并且平滑地融合到延伸部分中。 弯曲部分不压在相对的旋转体上。

公开(公告)号：US20130164059A1

公开(公告)日：2013-06-27

申请号：US13727817

申请日：2012-12-27

申请人： Hiromasa TAKAGI ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Hiroshi YOSHINAGA ,  Tadashi OGAWA ,  Takahiro IMADA ,  Kazuya SAITO ,  Naoki IWAYA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Teppei KAWATA ,  Takamasa HASE ,  Shuutaroh YUASA ,  Takuya SESHITA ,  Takeshi UCHITANI ,  Arinobu YOSHIURA ,  Hajime GOTOH ,  Akira SUZUKI

发明人： Hiromasa TAKAGI ,  Masahiko SATOH ,  Masaaki YOSHIKAWA ,  Kenji ISHII ,  Hiroshi YOSHINAGA ,  Tadashi OGAWA ,  Takahiro IMADA ,  Kazuya SAITO ,  Naoki IWAYA ,  Toshihiko SHIMOKAWA ,  Kensuke YAMAJI ,  Teppei KAWATA ,  Takamasa HASE ,  Shuutaroh YUASA ,  Takuya SESHITA ,  Takeshi UCHITANI ,  Arinobu YOSHIURA ,  Hajime GOTOH ,  Akira SUZUKI

IPC分类号： G03G15/20

CPC分类号： G03G15/2089 ,  G03G15/2053 ,  G03G15/206 ,  G03G2215/2035

摘要： According to an embodiments, provided is a fixing device that includes: an endless fixing belt, heats and melts a toner image, and has flexibility; a stationary member that is set stationary on an inner peripheral surface side of the fixing belt and comes into contact under pressure to form a nip portion; and a reinforcement member that is set stationary on the inner peripheral surface side of the fixing belt and comes into abutment with the stationary member. If it is assumed that a length of the nip portion in a direction of conveyance of the recording medium is designated as A; and a length between an upstream-side abutment portion and a downstream-side abutment portion at which the stationary member and the reinforcement member come into abutment with each other is designated as B, following relation is established: A

摘要翻译： 根据实施例，提供一种定影装置，其包括：环形定影带，加热并熔化调色剂图像，并且具有柔性; 固定部件，其固定在所述定影带的内周面侧，并且在压力下接触以形成压合部; 以及固定在固定带的内周面侧并与静止部件抵接的加强部件。 如果假设记录介质的传送方向上的夹持部的长度被指定为A， 将固定部件与加强部件抵接的上游侧抵接部与下游侧抵接部之间的长度设为B，建立以下关系：A