JP2019059313A - Lock release unit - Google Patents

Abstract

To provide a lock release unit which makes an outer pipe less likely to fall from a groove part.SOLUTION: A lock release unit includes: a bracket fixed to a frame of a seat back; a body fixed to the bracket; a lever rotatably supported on the body through a rotary shaft; an inner cable in which one end is fixed to the lever and the other end is connected to a reclining device; an outer pipe covering the inner cable; and a restriction part which restricts deformation of the body. The body includes a plate-like part in which a groove part extending from an opening provided at one end edge is formed penetrating therethrough in a plate thickness direction. A part of the body located in the plate thickness direction of the plate-like part is opened to one end edge side. The outer pipe includes: a small diameter part fitted in the groove part; and large diameter parts provided at both axial ends of the small diameter part and having an outer diameter larger than the small diameter part. The restriction part restricts movement of the plate-like part to the opening side of a groove part extending direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lock release unit of a reclining device, and relates to a lock release unit capable of making it difficult for an outer pipe to fall out of a groove.

  In a seat of an automobile or the like, a seat back is supported on a seat cushion by a reclining device so as to be adjustable in angle. A lock is placed on the seat near the top of the seatback (shoulder's shoulder) and the lever and recliner are connected by an inner cable, and the lock is released by operating the lever. There is one which has The lock release unit attaches the body on which the lever is rotatably supported to the bracket fixed to the frame of the seat back, and the groove opens at one end of the plate-like portion while penetrating the plate-like portion of the body in the thickness direction Then, the small diameter portion of the outer pipe covering the inner cable is slid in the radial direction and assembled.

JP, 2016-78627, A

  However, in the above-mentioned prior art, the outer pipe receives an axial tensile load from the inner cable pulled by the rotation operation of the lever. By the tensile load, the body is deformed such that one end edge side of the plate-like portion in which the groove portion is opened is pulled. Thereby, the plate-like portion is inclined so that the one end edge where the groove portion opens approaches the lever, so the small diameter portion moves to the opening side in the groove along the inclination and the outer pipe is easily detached from the groove portion There is a problem.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an unlocking unit that can make it difficult to drop the outer pipe from the groove.

  In order to achieve this object, the lock release unit of the present invention transmits the release force to a reclining device that allows the seat cushion to support the seat back in an adjustable manner, thereby enabling the angular adjustment. A bracket fixed to the frame, a body fixed to the bracket, a lever rotatably supported by the body via a rotation shaft, one end fixed to the lever and the other end fixed to the reclining device And an inner cable for transmitting to the reclining device a release force due to pulling caused by the rotation operation of the lever, an outer pipe covering the inner cable, and a restricting portion for restricting deformation of the body. In the body, a groove extending from an opening provided at one end edge is formed penetrating in the thickness direction It has a plate-like part, a part of the body located in the thickness direction of the plate-like part is opened to the one end edge side, and the outer pipe has a small diameter part fitted in the groove and an axial direction of the small diameter part A large diameter portion provided at both ends and having an outer diameter larger than the small diameter portion, and the restricting portion restricts the movement of the plate-like portion toward the opening in the extending direction of the groove. .

  According to the lock release unit of claim 1, the following effects can be obtained. The opening of the groove is provided at one end edge of the plate-like portion, and a part of the body positioned in the thickness direction of the plate-like portion is open at the one end edge side. Thus, the outer pipe can be slid in the radial direction from the one end edge side, and the large diameter portions can be positioned on both sides in the plate thickness direction of the plate portion while the small diameter portion is fitted in the groove. Thus, the outer pipe can be easily assembled to the plate-like portion.

  In addition, since a part of the body positioned in the thickness direction of the plate-like portion is opened to the one end edge side, the rigidity on the one end edge side of the body is relatively weak. Therefore, when the outer pipe receives a tensile load in the axial direction from the inner cable pulled by the rotation operation of the lever, the body tends to be deformed such that one end edge of the plate portion is pulled toward the lever. That is, the plate-like portion tends to incline so that the one end edge of the plate-like portion approaches the lever while the plate-like portion moves toward the one end edge side (the opening side in the extending direction of the groove portion). However, since the movement of the plate-like portion toward the opening in the extending direction of the groove is restricted by the restricting portion, the inclination of the plate-like portion is also suppressed. As a result, it is possible to prevent the small diameter portion from moving toward the opening in the groove along the inclined plate-like portion, so that it is possible to make the outer pipe difficult to come off from the groove.

  According to the lock release unit of the second aspect, in addition to the effects of the lock release unit of the first aspect, the following effect is obtained. The restricting portion is positioned on the side of the opening in the extending direction of the groove with respect to the plate-like portion. Furthermore, since the restricting portion is disposed at a position where the large diameter portion can contact with the small diameter portion fitted in the groove portion, the large diameter portion is a restricting portion even if the small diameter portion moves toward the opening in the groove portion. The small diameter portion can be prevented from coming out of the opening through contact. Thus, the outer pipe can be prevented from coming off from the groove.

  According to the lock release unit of the third aspect, in addition to the effect of the lock release unit of the second aspect, the following effect is obtained. A gap is provided between the restricting portion and the body when the lever is not operated. As a result, it is possible to suppress the contact noise and the rubbing noise between the regulating portion and the body when the lever is operated or vibrated, and the gap between the regulating portion and the body absorbs manufacturing errors of the regulating portion and the body to assemble There is an effect that the deterioration can be suppressed.

  According to the lock release unit of claim 4, in addition to the effects of the lock release unit of claim 2 or 3, the following effects are achieved. The bracket includes a frame fixing portion fixed to the frame, a body fixing portion fixed to the body, and a connecting portion connecting the frame fixing portion and the body fixing portion. A part of the connecting portion located on the side of the opening in the extending direction of the groove with respect to the plate-like portion is a restricting portion. As a result, since the regulation portion can be provided without diverting a part of the bracket and adding a member, there is an effect that it is possible to suppress an increase in the work process and cost for providing the regulation portion.

  According to the lock release unit of the fifth aspect, in addition to the effect of the lock release unit of the first aspect, the following effect is obtained. The bracket includes a frame fixing portion fixed to the frame, a body fixing portion fixed to the body, and a connecting portion connecting the frame fixing portion and the body fixing portion. A part of the plate-like part which protrudes toward a part of the connection part located on the opening side of the extending direction of the groove part with respect to the plate-like part is a restricting part. As a result, since the regulation portion can be provided without diverting a part of the plate-like portion and adding a member, there is an effect that it is possible to suppress an increase in the work process and cost for providing the regulation portion.

It is a top perspective view of a sheet which has a lock release unit in a 1st embodiment of the present invention. (A) is a lower perspective view of a body and a lever, (b) is a bottom view of the body and a lever seen from the arrow IIb direction of Fig.2 (a). (A) is a side view of a lock release unit, (b) is sectional drawing of the lock release unit in the IIIb-IIIb line | wire of Fig.3 (a). (A) is a side view of the lock release unit in 2nd Embodiment, (b) is sectional drawing of the lock release unit in the IVb-IVb line | wire of Fig.4 (a). (A) is a side view of the lock release unit in 3rd Embodiment, (b) is sectional drawing of the lock release unit in the Vb-Vb line | wire of Fig.5 (a). (A) is a side view of the lock release unit in 4th Embodiment, (b) is a bottom view of the lock release unit seen from the arrow VIb direction of Fig.6 (a).

  Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings. FIG. 1 is a top perspective view of a seat 1 having a lock release unit 10 according to a first embodiment of the present invention. FIG. 2A is a lower perspective view of the body 30 and the lever 31. FIG. FIG. 2 (b) is a bottom view of the body 30 and the lever 31 as viewed in the direction of the arrow IIb of FIG. 2 (a). In FIG. 1A, the back frame 6 of the seat back 3 of the seat 1 is illustrated, and the back pad of the seat back 3 and the skin material are omitted. In FIG. 2A, a part of the inner cable 40 and the outer pipe 43 is illustrated. Further, arrows U-D, L-R, and F-B in the drawings respectively indicate the vertical direction, the horizontal direction, and the front-rear direction of the sheet 1. However, the lateral direction and the longitudinal direction of the seat 1 do not necessarily coincide with the lateral direction and the longitudinal direction of the vehicle on which the seat 1 is mounted.

  As shown in FIG. 1A, the seat 1 is a seat for two persons mounted on a vehicle such as a car. The seat 1 may be a seat for one person, and the seat 1 may be a seat for an aircraft or a ship other than a vehicle. The seat 1 includes a seat cushion 2 constituting a seat surface, a seat back 3 constituting a backrest, and a headrest 4 fixed to an upper end portion of the seat back 3.

  The seat cushion 2 is configured by supporting a cushion pad (not shown) made of foam such as flexible polyurethane foam on the cushion frame 5 and covering the cushion pad with the skin material 2a. Similarly, the seat back 3 is configured such that a back pad (not shown) made of foam such as flexible polyurethane foam is supported by the back frame 6 and the back pad is covered with a skin material (not shown).

  The back frame 6 includes a pair of left and right side frames 6a extending in the vertical direction U-D, a lower frame 6b bridged to the lower end between the pair of side frames 6a, and an upper end between the pair of side frames 6a And an upper frame 6c to be bridged. The side frame 6a, the lower frame 6b, and the upper frame 6c are metal members, and are joined to each other by welding, screwing or the like to form a substantially square frame shape. The side frame 6a, the lower frame 6b, and the upper frame 6c may be made of synthetic resin.

  Lower end portions of the pair of side frames 6 a are respectively connected to rear end portions of the cushion frame 5 via the reclining device 7. The reclining device 7 causes the seat cushion 2 to support the seat back 3 so as to be adjustable in angle. The reclining device 7 is provided with a crank-like unlocking portion 8 rotatable around the rotation shaft 8a.

  The unlocking portion 8 is provided on the inner side of the pair of side frames 6a. The unlocking portion 8 is provided with a hooking portion 8b which can hook an annular lower end portion 42 described later at a position away from the rotation shaft 8a. The unlocking portion 8 is biased to a predetermined position shown in FIG. 1 by the elastic force of a spring member (not shown).

  When the unlocking portion 8 is not operated, the angle of the seat back 3 with respect to the seat cushion 2 is locked. By pulling the hooking portion 8b upward U and rotating the unlocking portion 8 about the rotation shaft 8a against the elastic force of the spring member, the angle lock of the seat back 3 with respect to the seat cushion 2 is released, and the seat The angle of the back 3 can be adjusted.

  The seat 1 is provided with an unlocking unit 10 that transmits an unlocking force that pulls the hooking portion 8b upward U to the unlocking portion 8 of the reclining device 7 so that the angle of the seat back 3 can be adjusted. The lock release unit 10 includes a bracket 20 fixed to the upper portion of the upper frame 6 c, a body 30 fixed to the bracket 20, a lever 31 rotatably supported by the body 30, a lever 31 and a lock release portion 8 It comprises an inner cable 40 connecting the hooking portion 8 b and an outer pipe 43 covering the inner cable 40.

  The bracket 20 includes a frame fixing portion 21 fixed to the upper frame 6c, an annular body fixing portion 22 to which the body 30 is fixed, and connecting portions 23 and 24 connecting the frame fixing portion 21 and the body fixing portion 22. Prepare. The frame fixing portion 21 is a flat plate made of metal extending to the left and right, and is fixed to the upper portion of the upper frame 6c by welding, screwing or the like.

  The body fixing portion 22 is a substantially annular member formed by bending or shearing a metal plate. The body fixing portion 22 is formed such that the outer peripheral edge is curved slightly downward D and the rear end portion is greatly curved downward D.

  The connection parts 23 and 24 are metal plates extended in the up-down direction UD. The lower ends of the connecting portions 23 and 24 are integrally formed with the body fixing portion 22, and the upper ends are joined to the outer peripheral surface of the body fixing portion 22 by welding or the like.

  The connecting portion 23 is a bending portion 23a which is bent in the left direction L (connecting portion 24 side) halfway from the upper end to the lower end, and is extended downward D from the left end of the bending portion 23a so that the bending portion 23a and the frame fixing portion 21 And a flat plate-like regulating portion 23b connecting the two. The connection part 24 is formed in flat form. The restricting portion 23 b and the connecting portion 24 of the connecting portion 23 are provided substantially perpendicularly to the frame fixing portion 21. By bending a metal plate of a predetermined shape, the bent portions 23a and the restricting portions 23b are formed while forming the connecting portions 23 and 24 erected at the end edge of the frame fixing portion 21 in the left-right direction L-R. .

  As shown in FIG. 1, FIG. 2 (a) and FIG. 2 (b), the body 30 is a member made of synthetic resin. The body 30 includes an exposed portion 32 exposed to the outside of a skin material (not shown) of the seat back 3 and protrusions 33 and 34 protruding downward from the exposed portion 32. The exposed portion 32 is formed such that the rear end portion thereof is largely curved downward D along the body fixing portion 22. In the exposed portion 32, a recess 32a for receiving the lever 31 inside is provided on the upper surface side.

  The projecting portion 33 is a plate-like member which protrudes from the left side of the exposed portion 32 to the lower side D while the thickness direction is directed to the left-right direction L-R. The protrusion 33 is formed with a recess 33 a in which the front end edge is recessed toward the rear end (rear B) of the exposed portion 32.

  The protrusion 34 is a box-like member that protrudes downward D from the right side of the exposed portion 32. A part of the lever 31 (a rotary plate 39) is accommodated inside the projection 34. The projecting portion 34 includes a plurality of wall portions 35a, 35b, 35c extending downward from the exposed portion 32 and a plate-like portion 36 whose end edge is connected to the lower ends of the wall portions 35a, 35b, 35c. .

  The wall portion 35 a is provided upright at the front edge of the plate portion 36. In the wall portion 35a, a recessed portion 34a recessed toward the wall portion 35c (rear B) is formed along the left-right direction L-R. The recess 34 a and the recess 33 a are positioned in the same straight line. The inner peripheral edge on the front side of the body fixing portion 22 is fitted in the concave portions 33a and 34a. The width (dimension in the left-right direction L-R) of the wall 35 a is constant in the up-down direction U-D.

  The wall portion 35 b is provided upright at the left L edge of the plate portion 36. The wall portion 35 b connects the wall portion 35 a and the wall portion 35 c in the front-rear direction F-B along the vertical direction U-D. The wall portion 35 c is provided upright at the end edge of the rear portion B of the plate-like portion 36. The width of the upper portion of the wall portion 35c is set to be smaller than the width of the lower portion (in the horizontal direction L-R dimension). This is for securing the rotation trajectory of the rotary plate 39 housed inside the projecting portion 34.

  The plate-like portion 36 is disposed substantially parallel to a rotation shaft 37 described later. In the plate-like portion 36, a groove 36b is formed by penetrating the plate-like portion 36 in the plate thickness direction. The groove 36 b is extended from the opening 36 c provided at the right end edge 36 a of the plate-like portion 36 toward the wall 35 b. The extending direction of the groove 36 b is the left-right direction L-R of the body 30 or the seat 1. The small diameter portion 44a of the outer pipe 43 is fitted into the groove 36b. The width (dimension in the front-rear direction F-B) of the groove 36b narrows on the way from the opening 36c to the wall 35b. As a result, it is possible to make it difficult for the small diameter portion 44a to come off the groove 36b.

  The lever 31 is a substantially thick plate-like synthetic resin member that is curved in the front-rear direction F-B. The lever 31 is rotatably supported by the body 30 via the rotation shaft 37. The rotating shaft 37 is a metal rod and is inserted into through holes provided in the lever 31 and the body 30. When the lever 31 is not operated, substantially the entire lever 31 is accommodated in the recess 32 a of the exposed portion 32. Hereinafter, when the configuration of the lever 31 is described, unless otherwise specified, the state at the time of non-operation of the lever 31 will be described.

  The lever 31 includes a rotary plate 39 which protrudes downward D and is accommodated inside the protrusion 34 of the body 30. The rotary plate 39 is a substantially fan-shaped plate in a side view. The thickness direction of the rotary plate 39 is the same as the thickness direction of the wall portion 35b.

  The rotary plate 39 is formed with a circular hole 39a which is recessed toward the wall 35b from the surface opposite to the wall 35b. A groove 39 b is formed on the outer peripheral surface of the rotary plate 39 at a lower portion D than the round hole 39 a. The groove 39b communicates with the round hole 39a, and is formed in a track shape centered on the round hole 39a. In the rotary plate 39, a notch 39c is formed by cutting out from the round hole 39a toward the rear B to the outer peripheral surface of the rotary plate 39. The notch 39c penetrates and forms a plate-like portion on the opposite side of the wall 35b from the groove 39b.

  The inner cable 40 is mainly composed of a metal cable such as stainless steel covered with a slidable synthetic resin, and has a predetermined flexibility. The two ends of the inner cable 40 are a cylindrical metal upper end 41 whose central axis is orthogonal to the axis of the inner cable 40 and an annular lower end 42 made of metal. The upper end portion 41 is rotatably fitted in the round hole 39 a of the lever 31, and the lower end portion 42 is hooked on the hooking portion 8 b of the unlocking portion 8, whereby the lever 31 and the unlocking portion 8 are connected by the inner cable 40.

  The outer pipe 43 is a pipe mainly made of a metal core material such as stainless steel covered with a synthetic resin, and has a predetermined flexibility. An inner cable 40 passes through the inside of the outer pipe 43, and the inner cable 40 is drawn out from the upper end 44 and the lower end 45 of the outer pipe 43. The inner cable 40 and the outer pipe 43 are provided with branched portions 46 at predetermined positions, and have two lower ends 42 and 45 for one upper end 41 and 44, respectively. Two lower end portions 42 and 45 are respectively disposed on the pair of side frames 6a.

  The upper end portion 44 and the lower end portion 45 of the outer pipe 43 are configured to have higher rigidity than the other portions. The upper end portion 44 includes a small diameter portion 44 a and large diameter portions 44 b provided on both axial ends of the small diameter portion 44 a. The large diameter portion 44b has a larger outer diameter than the small diameter portion 44a. Similarly to the upper end portion 44, the lower end portion 45 is provided with large diameter portions (not shown) larger in outer diameter than the small diameter portion on both axial sides of the small diameter portion (not shown).

  In the upper end portion 44, the small diameter portion 44a fits in the groove 36b of the plate portion 36 of the body 30, and the large diameter portion 44b contacts both surfaces in the plate thickness direction of the plate portion 36. As a result, the upper end portion 44 is axially immovably fixed to the plate-like portion 36. Since the plate-like portion 36 of the body 30 is fixed to the back frame 6 via the bracket 20, the upper end 44 is also fixed to the back frame 6.

  The lower end portion 45 is hooked on a metal plate-like clip 6d projecting inward from the side frame 6a. Specifically, the small diameter portion of the lower end portion 45 is fitted to the clip 6d, and the large diameter portion of the lower end portion 45 is brought into contact with the upper and lower sides of the clip 6d, so that the lower end portion 45 is axially immovably fixed to the side frame 6a. Be done.

  Such an unlocking unit 10 is assembled to the back frame 6 as follows. First, the frame fixing portion 21 of the bracket 20 is fixed to the upper frame 6c. Then, the lower end portion 42 of the inner cable 40 is connected to the hooking portion 8b of the unlocking portion 8, and the lower end portion 45 of the outer pipe 43 is fixed to the clip 6d of the side frame 6a.

  Then, the upper end portion 41 of the inner cable 40 is inserted into the round hole 39a of the lever 31, and the inner cable 40 is guided to the groove 39b while passing the inner cable 40 through the notch 39c. Next, the small diameter portion 44a of the upper end portion 44 of the outer pipe 43 is fitted in the groove 36b of the plate-like portion 36 of the body 30 so as to slide leftward L from the opening 36c.

  Next, while inserting a part of the body 30 into the annular body fixing portion 22, the recessed portions 33 a and 34 a of the body 30 are fitted to the front inner peripheral edge of the body fixing portion 22. In this state, the exposed portion 32 of the body 30 is placed on the upper surface of the body fixing portion 22, and then the rear end portion of the exposed portion 32 is fixed to the rear end portion of the body fixing portion 22 with a bolt or the like. Thus, the unlocking unit 10 is assembled to the back frame 6.

  Thereafter, a back pad or a skin material (neither is shown) is attached to the back frame 6, and the seat back 3 is assembled. The inner cable 40 and the outer pipe 43 may be assembled to the body 30 and the lever 31 and the body 30 may be assembled to the bracket 20 after the back pad or the skin material is attached to the back frame 6.

  In addition, since there is no wall 35a, 35b, 35c in the right end edge 36a of the plate-like part 36, a part of the body 30 (protrusion part 34) located in the thickness direction of the plate-like part 36 It is released to the right R). Therefore, since it is easy to access the rotary plate 39 of the lever 31 located in the upper U (in the box-like protrusion 34) of the plate-like portion 36 from the right direction R, assembly of the inner cable 40 to the rotary plate 39 is facilitated. it can.

  Furthermore, an opening 36c of the groove 36b is provided at the right end edge 36a while a part of the body 30 positioned in the thickness direction of the plate-like portion 36 is opened to the right end edge 36a side. Thereby, as described above, the upper end portion 44 of the outer pipe 43 is slid from the right end edge 36a to the left L, and the small diameter portion 44a is fitted from the opening 36c to the groove 36b. The large diameter portions 45 b can be positioned (contacted) on both sides in the plate thickness direction. As a result, the outer pipe 43 can be easily attached to the plate-like portion 36.

  In the lock release unit 10 assembled in this manner, the exposed portion 32 and the lever 31 are exposed at the upper end portion of the seat back 3. When the lever 31 accommodated in the recess 32 a of the exposed portion 32 is rotated upward U, the inner cable 40 connected to the lever 31 is pulled upward U. As a result, the inner cable 40 moves upward U inside the outer pipe 43 fixed to the back frame 6. That is, the amount of withdrawal of the inner cable 40 from the upper end 44 of the outer pipe 43 is increased, and the amount of withdrawal of the inner cable 40 from the lower end 45 is decreased.

  As a result, the inner cable 40 between the lower end 45 and the unlocking portion 8 is shortened, so the hooking portion 8b of the unlocking portion 8 is pulled upward U, and the angle of the seat back 3 with respect to the seat cushion 2 is locked. Is released. As described above, when the inner cable 40 transmits the releasing force due to the pulling operation caused by the rotation operation of the lever 31 to the unlocking portion 8 of the reclining device 7, the angle adjustment of the seat back 3 with respect to the seat cushion 2 becomes possible.

  When the rotation operation of the lever 31 is stopped, the unlocking portion 8 returns to the predetermined position by the elastic force of the spring member (not shown) of the reclining device 7, and the angle adjustment of the seat back 3 becomes impossible again. At the same time, due to the elastic force of the spring member, the inner cable 40 and the lever 31 also return to the original position before the lever 31 is turned.

  When the lever 31 is rotated, a tensile load is applied to the outer pipe 43 from the inner cable 40 pulled by the lever 31 due to the friction between the inner cable 40 and the outer pipe 43. Then, an axially upward tensile load is applied from the outer pipe 43 to the plate-like portion 36. Hereinafter, the axial direction upper side of the inner cable 40 and the outer pipe 43 will be described simply as the axial direction upper side.

  Here, in order to facilitate the assembly of the inner cable 40 and the outer pipe 43, a part of the body 30 (projecting portion 34) located in the thickness direction of the plate portion 36 is opened to the right end edge 36a side Therefore, the rigidity on the right end edge 36 a side of the protrusion 34 is weakened. Furthermore, in order to secure the rotational trajectory of the rotary plate 39 of the lever 31, the width of the upper portion of the wall 35c from the wall 35b toward the right end 36a is reduced, so that the right end 36a of the projection 34 is Stiffness is weaker.

  Since the rigidity of the right end edge 36a side of the projecting portion 34 is weak, when a load upward in the axial direction is applied to the plate portion 36 by the rotation operation of the lever 31, the right end edge 36a side of the plate portion 36 The protrusion 34 tries to deform with the upper side as a fulcrum so as to be pulled toward the lever 31). That is, the plate-like portion 36 tends to be inclined so that the right end edge 36 a of the plate-like portion 36 approaches the lever 31 while the plate-like portion 36 moves to the right edge 36 a side (the opening 36 c side of the groove 36 b).

  Since the plate-like portion 36 is parallel to the rotation axis 37 of the lever 31 and the body 30 in a no-load state, the plate-like portion 36 is substantially perpendicular to the tension direction (axial direction) of the inner cable 40 in the groove 36 b. A stem 36 is arranged. When the plate-like portion 36 inclines upward to the right end edge 36 a with respect to a plane perpendicular to the tensile direction of the inner cable 40, the larger the inclination angle, the greater the tensile load of the outer pipe 43 in the axial direction. Among them, the component parallel to the plate-like portion 36 becomes large. Then, the large diameter portion 44b slides on the plate-like portion 36, and the small diameter portion 44a can easily move in the groove 36b toward the opening 36c.

  In particular, since the body 30 is made of synthetic resin, the body 30 may be softened when the vehicle having the seat 1 is left in direct sunlight and the temperature in the vehicle becomes high. When the lever 31 is rotated while the body 30 is softened, the protrusion 34 is easily deformed by the tensile load from the outer pipe 43, and the rising inclination of the plate 36 toward the right end edge 36a becomes larger. Further, the plate-like portion 36 is easily deformed so that the groove 36 b is expanded. Therefore, the small diameter portion 44a can be more easily moved toward the opening 36c in the groove 36b.

  As shown in FIGS. 3A and 3B, the bracket 20 is provided in the vicinity of the opening 36c side (rightward R) in the extending direction of the groove 36b with respect to the right end edge 36a of the plate-like portion 36. The control unit 23b of the second embodiment is disposed. Therefore, the movement of the plate-like portion 36 to the right R by the rotation operation of the lever 31 is restricted by the restricting portion 23 b. Along with the restriction of the movement of the plate-like portion 36 by the restricting portion 23 b, the inclination of the plate-like portion 36 is also suppressed. As a result, it is possible to prevent the small diameter portion 44a from moving toward the opening 36c in the groove 36b along the inclined plate-like portion 36, so that the outer pipe 43 can be made difficult to fall off from the groove 36b.

  The restricting portion 23 b is disposed in the vicinity of the right side R of the opening 36 c. More specifically, the restricting portion 23b is disposed at a position where the large diameter portion 44b can contact the restricting portion 23b in a state where the small diameter portion 44a is fitted in the groove 36b. Therefore, even if the small diameter portion 44a moves in the groove 36b toward the opening 36c, the large diameter portion 44b can be prevented from coming out of the opening 36c from the small diameter portion 44a in contact with the regulating portion 23b. As described above, the opening 36c is closed by the restricting portion 23b so that the outer pipe 43 can not fall off, so that the outer pipe 43 can be prevented from falling off from the groove 36b regardless of the inclination of the plate-like portion 36.

  In the present embodiment, when the plate-like portion 36 inclines while the plate-like portion 36 moves to the right R, the large diameter portion 44 b below the small diameter portion 44 a (on the lower end 45 side) is the restricting portion 23 b. The movement of the plate-like portion 36 to the right R is restricted by the restricting portion 23 b via the outer pipe 43. However, the right end edge 36a of the plate-like portion 36 moving to the right R by the operation of the lever 31 directly contacts the regulating portion 23b, and the movement of the plate-like portion 36 to the right R is regulated by the regulating portion 23b. As such, the positional relationship and dimensions of each part may be changed.

  As compared with the case where the plate-like regulating portion 23b and the right end edge 36a of the plate-like portion 36 come into contact, the contact area can be made smaller when the regulating portion 23b and the cylindrical large diameter portion 44b come in contact. Therefore, the rubbing noise between the regulating portion 23b and the large diameter portion 44b can be made smaller than the rubbing noise between the regulating portion 23b and the plate-like portion 36.

  The restricting portion 23 b includes an overhanging portion 23 c which protrudes to the front F from a portion connecting the frame fixing portion 21 and the body fixing portion 22 in a linear shape in a side view. The upper end portion 44 can be accommodated inside the outline of the restricting portion 23 b in the side view by the overhanging portion 23 c. Thus, when the small diameter portion 44a moves toward the opening 36c when the lever 31 is operated, the large diameter portion 44b can be reliably brought into contact with the restricting portion 23b. As a result, the outer pipe 43 can be reliably prevented from falling off the groove 36 b.

  The restricting portion 23 b is disposed in the vicinity of the plate-like portion 36, but when the lever 31 is not operated, a predetermined gap is provided between the restricting portion 23 b and the body 30. Thereby, it is possible to suppress the contact noise and the rubbing noise between the regulating portion 23b and the body 30 at the time of the operation of the lever 31 or at the time of the vibration of the vehicle on which the seat 1 is mounted.

  In addition, when the regulating portion 23b and the body 30 contact with each other when the lever 31 is not operated, if there is a manufacturing error in the regulating portion 23b or the body 30, the body 30 can not be assembled to the bracket 20, or the assembly becomes difficult Sometimes. On the other hand, in the present embodiment, since manufacturing errors of the restricting portion 23b and the body 30 can be absorbed by the gap between the restricting portion 23b and the body 30, the deterioration of the assembling property of the body 30 to the bracket 20 can be suppressed.

  Since the restricting portion 23 b is a part of the connecting portion 23 located on the right side R of the plate portion 36 and the opening 36 c, the restricting portion 23 b can be easily provided by slightly changing the shape of the bracket 20. As described above, since the restriction portion 23b can be provided without diverting a part of the bracket 20 and adding a member, it is possible to suppress an increase in the number of operation steps and cost for providing the restriction portion 23b.

  Furthermore, the restricting portion 23 b is a part of the connecting portion 23 whose both ends are respectively connected to the frame fixing portion 21 and the body fixing portion 22. Therefore, when the lever 31 is operated, even if the restricting portion 23 b receives a load from the outer pipe 43 or the plate-like portion 36 in the right direction R, the restricting portion 23 b can be hardly deformed. That is, the movement of the plate-like portion 36 in the right direction R by the restricting portion 23 b can be easily restricted. As a result, the outer pipe 43 can be made more difficult to come off from the groove 36 b.

  The protrusions 33 and 34 of the body 30 inserted in the inside of the body fixing portion 22 (projecting downward D) and a part of the lever 31 are accommodated on the left and right insides of the annular body fixing portion 22 in a bottom view. ing. As a result, when the body 30 and the lever 31 are assembled to the body fixing portion 22, parts of the protrusions 33 and 34 and the lever 31 can be smoothly inserted into the body fixing portion 22. That is, the body 30 and the lever 31 can be easily assembled to the body fixing portion 22.

  In order to restrict such movement of the plate-like portion 36 of the body 30 to the right R, the connecting portion 23 is bent to the left L (the connecting portion 24 side) by the bending portion 23 a, and the left and right inner sides of the body fixing portion 22 The regulating portion 23 b is brought close to the plate-like portion 36 housed in the. As a result, while making it easy to assemble the body 30 and the lever 31 to the body fixing portion 22, the movement of the plate-like portion 36 to the right R is sufficiently suppressed by the restricting portion 23b so that the outer pipe 43 does not easily come off from the groove 36b. it can.

  Furthermore, the surface on the side of the plate-like portion 36 of the restricting portion 23 b is located on the inner side of the inner periphery of the body fixing portion 22 in the lower surface view and the front view. Therefore, the restricting portion 23 b can be brought closer to the plate-like portion 36 of the body 30 housed inside the left and right of the body fixing portion 22. As a result, the movement of the plate-like portion 36 in the right direction R can be further suppressed by the restricting portion 23b, so that the outer pipe 43 can be further prevented from dropping out of the groove 36b.

  The connecting portion 23 is formed in a flat plate shape without providing the bending portion 23a, and the upper end of the connecting portion 23 is connected to the inner periphery of the body fixing portion 22, and the regulating portion 23b on the lower end side of the connecting portion 23 is plate-shaped. It may be close to the part 36. In this case, when the outer peripheral side of the body fixing portion 22 receives a load, the body fixing portion 22 may be deformed with the connecting portion of the body fixing portion 22 and the connecting portion 23 as a fulcrum. Therefore, as in the present embodiment, it is preferable to provide the bent portion 23a in the connecting portion 23 and connect the upper end of the connecting portion 23 to the outer periphery of the body fixing portion 22 while bringing the restricting portion 23b closer to the plate-like portion 36 . As a result, it is possible to make the outer pipe 43 less likely to come off from the groove 36 b while securing the strength of the bracket 20.

  Next, a second embodiment will be described with reference to FIGS. 4 (a) and 4 (b). In the first embodiment, the case where a part of the connecting portion 23 is the restricting portion 23 b has been described. On the other hand, in the second embodiment, the case where the restricting portion 53 which is a separate member from the connecting portion 52 is disposed between the connecting portion 52 and the plate-like portion 36 will be described. The same parts as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted. FIG. 4A is a side view of the lock release unit 50 in the second embodiment. FIG.4 (b) is sectional drawing of the lock release unit 50 in the IVb-IVb line | wire of FIG. 4 (a).

  As shown in FIGS. 4A and 4B, the bracket 51 of the unlocking unit 50 has a frame fixing portion 21 fixed to the upper frame 6c (see FIG. 1) and an annular shape to which the body 30 is fixed. And a connecting portion 24, 52 connecting the frame fixing portion 21 and the body fixing portion 22. In the lock release unit 50, the restricting portion 53 is fixed to the connecting portion 52 of the bracket 51.

  The connection parts 24 and 52 are metal plates extended in the up-down direction UD. The lower ends of the coupling portions 24 and 52 are integrally formed with the body fixing portion 22, and the upper ends are joined to the outer peripheral surface of the body fixing portion 22 by welding or the like. The connecting portions 24 and 52 are formed in a flat plate shape, and are provided substantially perpendicular to the frame fixing portion 21. By bending a metal plate of a predetermined shape, connecting portions 24 and 52 erected at the left and right end edges of the frame fixing portion 21 are formed.

  The restricting portion 53 of the lock release unit 50 is a substantially rectangular parallelepiped metal member disposed between the connecting portion 52 and the plate-like portion 36. The restricting portion 53 is slightly separated from the body 30 when the lever 31 is not operated. The restricting portion 53 is fixed to the inside (connecting portion 24 side) of the connecting portion 52 by a bolt 54.

  The restricting portion 53 may be fixed to the frame fixing portion 21 or the body fixing portion 22. Further, the invention is not limited to the case where the restricting portion 53 is fixed to the bracket 51 by the bolt 54, and the bracket 51 and the restricting portion 53 may be welded or may be fitted with claws or holes. If the method of fixing the restricting portion 53 is welding, it is not necessary to provide the bracket 51 with a through hole or the like for allowing the bolt to penetrate, so processing on the bracket 51 for providing the restricting portion 53 can be reduced.

  The restricting portion 53 is disposed near the right side R with respect to the right end edge 36 a of the plate-like portion 36. Thus, as in the first embodiment, movement of the plate-like portion 36 to the right R due to the tensile load of the outer pipe 43 applied upward to the plate-like portion 36 with the rotation operation of the lever 31 upward in the axial direction Are regulated by the regulation unit 53. When the movement of the plate-like portion 36 by the restricting portion 53 is restricted, the upward inclination of the plate-like portion 36 toward the right end edge 36 a due to the tensile load applied to the plate-like portion 36 is also suppressed. As a result, it is possible to prevent the small diameter portion 44a from moving toward the opening 36c in the groove 36b along the inclined plate-like portion 36, so that the outer pipe 43 can be made difficult to fall off from the groove 36b.

  In the first embodiment, the opening 36c is closed by the restricting portion 23b so that the outer pipe 43 can not fall off, so the outer pipe 43 is removed from the groove 36b in a state where the body 30 is assembled to the bracket 20. The outer pipe 43 can not be attached to the groove 36b. On the other hand, in the second embodiment, since the restricting portion 53 is not located on the right side R of the opening 36c (on the side of the opening 36c in the extending direction of the groove 36b), the opening 36c is not closed. . Therefore, in a state where the body 30 is assembled to the bracket 20, the outer pipe 43 can be attached to and detached from the groove 36b. As a result, the degree of freedom in the order of assembling the lock release unit 50 to the back frame 6 can be improved, and the outer pipe 43 and the like can be easily attached and detached at the time of maintenance.

  In the first embodiment, a part of the bracket 20 is used as the restricting portion 23b. However, in the second embodiment, since the bracket 51 and the restricting portion 53 are separate members, the shape of the bracket 51 can be set relatively freely. . Therefore, the restricting portion 53 can be easily provided on the bracket of the conventional lock release unit which does not have the restricting portion 53.

  Next, a third embodiment will be described with reference to FIGS. 5 (a) and 5 (b). In the second embodiment, the case where the restricting portion 53 fixed to the bracket 51 is not located on the right side R of the opening 36c has been described. On the other hand, in the third embodiment, the case where the restricting portion 63 fixed to the bracket 61 is located on the right side R of the opening 36c will be described.

  As shown in FIGS. 5 (a) and 5 (b), the bracket 61 of the unlocking unit 60 has a frame fixing portion 21 fixed to the upper frame 6c (see FIG. 1) and an annular shape to which the body 30 is fixed. The frame fixing portion 21 and the connecting portions 24 and 62 connecting the frame fixing portion 21 and the body fixing portion 22 are provided.

  The connection parts 24 and 62 are metal plates extended in the up-down direction UD. The lower ends of the coupling portions 24 and 62 are integrally formed with the body fixing portion 22, and the upper ends are joined to the outer peripheral surface of the body fixing portion 22 by welding or the like. The connecting portions 24 and 62 are formed in a flat plate shape, and are provided substantially perpendicularly to the frame fixing portion 21. By bending a metal plate of a predetermined shape, connecting portions 24 and 62 erected at the left and right end edges of the frame fixing portion 21 are formed.

  A part of the connecting portion 62 is located on the right side R of the opening 36 c (on the side of the opening 36 c in the extending direction of the groove 36 b). A through hole 62a is formed in the connecting portion 62 through a portion positioned in the extending direction with respect to the groove 36b.

  The restricting portion 63 of the lock release unit 60 is a cylindrical metal member. One end of the restricting portion 63 is fixed to the inside (connecting portion 24 side) of the connecting portion 62 by a bolt 64 inserted into the through hole 62 a. Thus, the regulating portion 63 is disposed between the connecting portion 52 and the plate portion 36 while the other end of the regulating portion 63 is slightly separated from the plate portion 36.

  The restricting portion 63 is disposed near the right side R with respect to the right end edge 36 a of the plate-like portion 36. Thus, as in the first embodiment, movement of the plate-like portion 36 to the right R due to the tensile load of the outer pipe 43 applied upward to the plate-like portion 36 with the rotation operation of the lever 31 upward in the axial direction Are regulated by the regulation unit 63. When the movement of the plate-like portion 36 by the restricting portion 63 is restricted, the upward inclination of the plate-like portion 36 toward the right end edge 36 a due to the tensile load applied to the plate-like portion 36 is also suppressed. As a result, it is possible to prevent the small diameter portion 44a from moving toward the opening 36c in the groove 36b along the inclined plate-like portion 36, so that the outer pipe 43 can be made difficult to fall off from the groove 36b.

  Furthermore, since the restricting portion 63 is disposed in the vicinity of the right side R of the opening 36c, the large diameter portion 44b can be brought into contact with the restricting portion 53 in a state where the small diameter portion 44a is fitted in the groove 36b. 63 is located. That is, since the opening 36c is closed by the restricting portion 63 so that the outer pipe 43 can not fall off, the outer pipe 43 can be prevented from falling out of the groove 36b regardless of the inclination of the plate-like portion 36.

  Since the columnar restricting portion 63 is provided at the necessary place as a minimum, the material cost of the restricting portion 63 can be suppressed. Further, since the restricting portion 63 is fixed to the connecting portion 62 by the bolt 64, the restriction is made in the conventional unlocking unit only by providing the through hole 62a at the predetermined position of the bracket of the conventional unlocking unit without the restricting portion 63. The portion 63 can be easily provided.

  Further, the restricting portion 63 can be easily attached to and detached from the connecting portion 62 by the bolt 64. Therefore, if the restricting portion 63 is removed in a state where the body 30 is assembled to the bracket 61, the outer pipe 43 can be easily attached to and detached from the groove 36b. As a result, the degree of freedom of the order in which the lock release unit 60 is attached to the back frame 6 can be improved, and the outer pipe 43 and the like can be easily attached and detached at the time of maintenance.

  Next, a fourth embodiment will be described with reference to FIGS. 6 (a) and 6 (b). In the first embodiment, the case where a part of the bracket 20 is the restricting portion 23 b has been described. On the other hand, in the fourth embodiment, a case where a part of the body 72 is the restricting portion 76 will be described. The same parts as those in the first and third embodiments are given the same reference numerals and the explanation thereof will be omitted.

  FIG. 6A is a side view of the lock release unit 70 in the fourth embodiment. FIG. 6 (b) is a bottom view of the lock release unit 70 as viewed in the direction of arrow VIb of FIG. 6 (a). The inner cable 40 and the outer pipe 43 are not shown in FIG.

  As shown in FIGS. 6 (a) and 6 (b), the bracket 71 of the lock release unit 70 has the same configuration as the bracket 61 in the third embodiment except that the through hole 62a is not provided. So I will omit the explanation.

  The body 72 of the lock release unit 70 is a member made of synthetic resin. The body 72 includes an exposed portion 32 exposed to the outside of the skin material of the seat back 3 and protrusions 33 and 73 protruding downward from the exposed portion 32. The protruding portion 73 is a box-like member protruding from the right side of the exposed portion 32. The rotary plate 39 of the lever 31 is accommodated in the inside of the projecting portion 73.

  The projecting portion 73 includes a plurality of wall portions 35a, 35b, 35c extending downward from the exposed portion 32 and a plate-like portion 74 whose end edge is connected to the lower ends of the wall portions 35a, 35b, 35c. . The wall portions 35 a, 35 b, 35 c are respectively provided upright at the respective end edges of the plate portion 74 excluding the right end edge 75.

  The plate-like portion 74 is disposed substantially in parallel with the rotation axis 37. A groove 36 b is formed in the plate-like portion 74 by penetrating the plate-like portion 74 in the plate thickness direction. The groove 36 b extends from the opening 36 c provided at the right end edge 75 of the plate-like portion 74 toward the wall 35 b. The small diameter portion 44a of the outer pipe 43 is fitted into the groove 36b.

  The right end edge 75 of the plate-like portion 74 is provided with a pair of restricting portions 76 that respectively project in the right direction R from both sides in the front-rear direction F-B of the opening 36 c. The restricting portion 76 is a part of the plate-like portion 74, and the tip of the restricting portion 76 is a part of the right end edge 75.

  The restricting portion 76 is a member for causing at least a part of the right end edge 75 of the plate-like portion 74 to approach the connecting portion 62 of the bracket 71. The connecting portion 62 is located in the vicinity of the right side R (the opening 36 c side in the extending direction of the groove 36 b) with respect to the tip of the regulating portion 76.

  Thus, similarly to the first embodiment, movement of the plate-like portion 74 to the right R due to the tensile load of the outer pipe 43 applied upward to the plate-like portion 74 with the rotation operation of the lever 31 upward. However, the restricting portion 76 of the plate-like portion 74 restricts the contact with the connecting portion 62. When the movement of the plate-like portion 74 by the restricting portion 76 is restricted, the upward inclination of the plate-like portion 74 toward the right end edge 75 due to the tensile load applied to the plate-like portion 74 is also suppressed. As a result, it is possible to prevent the small diameter portion 44a from moving toward the opening 36c in the groove 36b along the inclined plate-like portion 74, so that the outer pipe 43 can be made difficult to fall off from the groove 36b.

  The restricting portion 76 is disposed in the vicinity of the connecting portion 62, but when the lever 31 is not operated, a predetermined gap is provided between the tip of the restricting portion 76 and the bracket 71. Thus, contact noise or rubbing noise between the regulation portion 76 and the bracket 71 can be suppressed when the lever 31 is operated or when the lock release unit 70 vibrates, and the clearance between the regulation portion 76 and the bracket 71 causes the regulation portion 76 to It is possible to absorb the manufacturing error of the bracket 71 and suppress the deterioration of the assembling property of the body 72 to the bracket 71.

  The distance between the pair of restricting portions 76 located on both sides of the opening 36 c is set larger than the diameter of the large diameter portion 44 b of the outer pipe 43. Thus, in a state where the body 72 is assembled to the bracket 71, the outer pipe 43 removed from the groove 36b can be removed from between the pair of restricting portions 76, and the outer pipe 43 is inserted between the pair of restricting portions 76. Thus, the groove 36b can be fitted. As a result, the degree of freedom of the assembling order of the lock release unit 70 to the back frame 6 (see FIG. 1) can be improved, and the outer pipe 43 etc. can be easily attached and detached at the time of maintenance.

  Since the restricting portion 76 is a part of the plate-like portion 74, the restricting portion 76 can be easily provided by slightly changing the shape of the plate-like portion 74. As described above, since the restricting portion 76 can be provided without diverting a part of the plate-like portion 74 and adding a member, it is possible to suppress an increase in the number of operation steps for providing the restricting portion 76 and the cost.

  In particular, since the body 72 having the plate-like portion 74 is made of synthetic resin, the restriction portion 76 can be easily provided on the plate-like portion 74 simply by adding a portion corresponding to the restriction portion 76 to the molding die of the body 72. . That is, since the restricting portion 76 can be provided without adding a working step at the time of manufacturing the body 72 each time, it is possible to further suppress the increase in the working step for providing the restricting portion 76 and the cost.

  As mentioned above, although the present invention was explained based on an embodiment, the present invention is not limited at all by the above-mentioned each embodiment, and various improvement deformation can be performed within the range which does not deviate from the meaning of the present invention. Is easily guessable. For example, the shapes and materials mentioned in the above embodiments are merely examples, and it is of course possible to adopt other shapes and materials. For example, the bodies 30, 72 can be made of metal, or the brackets 20, 51, 61, 71 and the regulating portions 53, 63 can be made of synthetic resin.

  In the first embodiment, the bracket 20 of the lock release unit 10 is assembled to the upper portion of the upper frame 6c, and the case where the exposed portion 32 and the lever 31 are exposed at the upper end portion of the seatback 3 has been described. It is not something that can be done. The bracket 20 may be assembled to the rear of the upper frame 6c or the side frame 6a or to the side of the side frame 6a, and the exposed portion 32 and the lever 31 may be exposed to the back or side of the seatback 3.

  Although the case where the opening 36c is provided in the right end edges 36a and 75 of the plate-like parts 36 and 74 has been described in the above embodiments, the present invention is not necessarily limited thereto. The opening 36 c may be provided at one end of the plate-like portions 36, 74 other than the right end 36 a, 75. In this case, in order to ensure the assemblability of the inner cable 40 and the outer pipe 43, it is necessary to open a part of the body 30 located in the thickness direction of the plate-like portions 36 and 74 to one end edge side provided with the opening 36c. There is.

  In the above embodiments, when the lever 31 is not operated, the body 30 or the bracket 71 facing the restricting portions 23b, 53, 63, 76 in the extending direction of the groove 36b, and the restricting portions 23b, 53, 63, 76 Although the case where the clearance is provided between and and was described, it is not necessarily limited to this. The restriction portions 23b, 53, 63, 76 may be in contact with the body 30 or the bracket 71 at all times.

  Although the case where the restriction part 76 is a part of the plate-like part 74 has been described in the fourth embodiment, the invention is not necessarily limited to this. As long as the movement of the plate-like portion 74 toward the opening 36c in the extending direction of the groove 36b can be restricted, a part of the body 72 other than the plate-like portion 74 may be used as the restricting portion. In this case, since the lower side (the portion on the side of the plate-like portion 74) of the regulation portion can be deformed, the movement of the plate-like portion 74 is restricted compared to the case where a part of the plate-like portion 74 is used as the regulation portion 76. It becomes difficult to do. That is, by using a part of the plate-like portion 74 as the restricting portion 76, the movement of the plate-like portion 74 can be easily restricted.

  In the fourth embodiment, the case where the distance between the pair of restricting portions 76 located on both sides of the opening 36 c is set larger than the diameter of the large diameter portion 44 b of the outer pipe 43 has been described. It is not limited. The distance between the pair of restricting portions 76 may be smaller than the diameter of the large diameter portion 44 b of the outer pipe 43. In this case, the space between the pair of restricting portions 76 is also part of the groove 36 b.

2 Seat cushion 3 Seat back 6 Back frame (frame)
7 Reclining device 10, 50, 60, 70 Lock release unit 20, 51, 61, 71 Bracket 21 Frame fixing portion 22 Body fixing portion 23, 24, 52, 62 Connecting portion 23b, 53, 63, 76 Regulating portion 30, 72 Body 31 lever 36, 74 plate 36a, 75 right end edge (one end edge)
36b groove 36c opening 37 rotary shaft 40 inner cable 43 outer pipe 44a small diameter portion 44b large diameter portion

Claims (5)

A lock release unit that transmits an unlocking force to a reclining device that allows the seat cushion to support the seat back in an adjustable manner, thereby making it possible to adjust the angle,
A bracket fixed to the seatback frame;
A body fixed to the bracket;
A lever rotatably supported on the body via a rotating shaft;
An inner cable having one end fixed to the lever and the other end connected to the reclining device, and transmitting to the reclining device a release force due to pulling caused by the rotation operation of the lever;
An outer pipe covering the inner cable;
And a regulating unit that regulates the deformation of the body,
The body includes a plate-like portion in which a groove portion extending from an opening provided at one end edge is formed to penetrate in a plate thickness direction,
A part of the body located in the thickness direction of the plate-like portion is opened to the one end edge side,
The outer pipe has a small diameter portion that fits into the groove;
And a large diameter portion provided at both axial ends of the small diameter portion and having an outer diameter larger than the small diameter portion;
The lock release unit, wherein the restricting portion restricts the movement of the plate-like portion toward the opening in the extending direction of the groove.   The restricting portion is positioned on the side of the opening with respect to the plate-like portion in the extending direction of the groove, and at a position where the large diameter portion can contact with the small diameter portion fitted in the groove. The unlocking unit according to claim 1, characterized in that it is arranged.   3. The lock release unit according to claim 2, wherein a gap is provided between the restricting portion and the body when the lever is not operated. The bracket is a frame fixing portion fixed to the frame.
A body fixing portion to which the body is fixed;
A connecting portion connecting the frame fixing portion and the body fixing portion;
The connecting portion is partially located on the opening in the extending direction of the groove with respect to the plate-like portion,
The lock release unit according to claim 2 or 3, wherein the restricting portion is a part of the connecting portion positioned on the opening side of the extending direction of the groove with respect to the plate-like portion. . The bracket is a frame fixing portion fixed to the frame.
A body fixing portion to which the body is fixed;
A connecting portion connecting the frame fixing portion and the body fixing portion;
The connecting portion is partially located on the opening in the extending direction of the groove with respect to the plate-like portion,
The restricting portion is a part of the plate-like portion which protrudes toward a portion of the connecting portion which is located on the side of the opening in the extending direction of the groove with respect to the plate-like portion. The lock release unit according to claim 1.

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