JP2007137291A - Seat track device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking device capable of certainly preventing backlash between a lock lever bracket and a lock lever and a seat track device furnished with it. <P>SOLUTION: This lock lever bracket is constituted so that a first bearing hole part is formed on one of a pair of supporting parts facing against each other and a first hollow shaft part is formed on the other to be projected outward coaxially, the lock lever is constituted so that a second hollow shaft part is formed on one of a pair of supported parts facing against each other to be projected outward and a second bearing hole part is formed on the other coaxially, it is supported free to revolve against the lock lever bracket by fitting the second hollow shaft part in the first bearing hole part and fitting the first hollow shaft part in the second bearing hole part, and a projected part from the second bearing hole part or the first bearing hole part is applied with caulking work concerning one of the first hollow shaft part and the second hollow shaft part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a lock structure for an upper rail and a lower rail of a vehicle seat track apparatus.

As a lock structure of a conventional seat track device, for example, a lever bracket having a pair of support portions fixed to the upper rail and having bearing holes formed therein, and a pair of shaft portions fitted into the bearing holes of the respective support portions, the lever There has been a lock lever that is rotatably supported by a bracket (Patent Document 1).

In this lock structure, a fitting groove that guides the shaft portion from the outside to the bearing hole is formed in the support portion, and a retaining member that restricts the shaft portion from being detached from the bearing hole is provided. With such a configuration, the workability of assembling the lock lever to the lever bracket can be improved.
JP 2004-155305 A JP 2004-122826 A

However, in the above-described lock structure, the extension piece for providing the support portion of the lever bracket and the shaft portion of the lock lever is formed by bending, and it is not easy to increase the processing accuracy. A backlash occurred between the bracket and the lock lever, and the slidability of the lock lever varied. Furthermore, since it is necessary to provide a member for preventing the lock lever from coming off, the number of parts is increased. Further, since the fitting groove has to be formed in the support portion, the machining process has to be complicated.

In order to solve the above problems, a seat track device according to the present invention includes a lower rail fixed to a vehicle floor, an upper rail fixed to a vehicle seat and movable along the lower rail, and one of the lower rail and the upper rail. A lock lever bracket having a first bearing hole portion formed on one of a pair of support portions facing each other and a first hollow shaft portion formed coaxially so as to protrude outwardly on the other, A second hollow shaft portion is formed on one of a pair of supported portions facing each other so as to protrude outward, and a second bearing hole portion is formed coaxially on the other side. By fitting the hollow shaft portion and fitting the first hollow shaft portion to the second bearing hole portion, it is supported rotatably with respect to the lock lever bracket and locked to the other of the lower rail and the upper rail. By doing the upper A locking lever that can lock the rod so that it cannot move, and caulking the second bearing hole portion or the protruding portion from the first bearing hole portion with respect to one of the first hollow shaft portion and the second hollow shaft portion. It is characterized by being.

The seat track device of the present invention is fixed to one of the lower rail and the upper rail fixed to the vehicle floor, the upper rail fixed to the vehicle seat and movable along the lower rail, and facing each other. A seat track device including a lock lever bracket having a pair of supporting portions and a lock lever having a pair of supported portions facing each other, wherein one of the pair of supporting portions and the pair of supported portions Includes a first hollow shaft portion and a second hollow shaft portion formed so as to protrude coaxially in the same direction, and on the other side, the first bearing hole portion and the second bearing hole portion are coaxial. The lock lever can be rotated with respect to the lock lever bracket by fitting the second hollow shaft portion into the first bearing hole portion and fitting the first hollow shaft portion into the second bearing hole portion. Supported by The upper rail can be locked so as not to move by being locked to the other of the lower rail and the upper rail, and the second bearing hole portion or the first bearing is provided for one of the first hollow shaft portion and the second hollow shaft portion. The protruding portion from the hole is caulked and processed.

In the seat track device, a support portion or a supported portion provided with the other of the first hollow shaft portion and the second hollow shaft portion that are not caulked, and the other of the first hollow shaft portion and the second hollow shaft portion. It is preferable that the second bearing hole portion or the support portion or the supported portion in which the first bearing hole portion is fitted is disposed with a gap therebetween.

The first hollow shaft portion and the second hollow shaft portion can be formed by burring.

A movement restricting portion that regulates the amount of movement of the upper rail with respect to the lower rail by forming a stopper portion formed by cutting and raising from the floor portion to the upper rail side at the approximate center of the lower rail and abutting the stopper portion on the upper rail. It can also be provided.

A stopper that regulates the amount of movement of the upper rail relative to the lower rail is formed by forming a movement restricting portion that is cut and raised in the vicinity of the front end portion and the rear end portion of the upper rail, and abutting the movement restricting portion on the lower rail. It may be provided.

According to the present invention, between one of the first hollow shaft portion and the second hollow shaft portion, the projecting portion from the second bearing hole portion or the first bearing hole portion is caulked, so that it is between the lever bracket and the lock lever. The rattling can be surely prevented and the number of parts can be reduced by eliminating the need for a retaining member. Further, since only one of the first hollow shaft portion and the second hollow shaft portion is caulked, the slidability of the lock lever with respect to the lever bracket has a plate thickness with less dimensional variation compared to bending. After adjustment, it can be stabilized easily. Further, a plate of the lock lever or the lever bracket is provided by providing a predetermined gap between the lock lever and the lever bracket on the non-caulking side of the first hollow shaft portion and the second hollow shaft portion. The influence of thickness and distortion can be suppressed, and the slidability of the lock lever with respect to the lever bracket can be further stabilized. Moreover, since the structure for introducing the lock lever into the support portion is unnecessary, the number of processing steps can be reduced.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.
A seat track device 10 (see FIG. 4) according to the present embodiment is fixed to a pair of left and right lower rails 20 (FIG. 1) fixed on a vehicle floor (not shown) and a lower portion of a seat (not shown). A pair of left and right upper rails 40 (FIG. 2) and a lock structure 60 (FIG. 3) for prohibiting relative movement of the upper rail with respect to the lower rail are provided. Since the seat track device is substantially symmetrical when mounted on the vehicle, only the configuration of the seat track device mounted on the left side of the vehicle will be described here, and the configuration of the device mounted on the right side will be described. Is omitted.

As shown in FIG. 1, the lower rail 20 has a central portion of a hollow substantially rectangular parallelepiped upper surface 21 that is open in the longitudinal direction and both longitudinal end surfaces are open, and extends in the front-rear direction of the vehicle. Placed in. A plurality of lock holes 30 are formed in the side surface 22 at regular intervals along the longitudinal direction. A cut-and-raised portion (stopper portion) 35 composed of two plate-like portions that are cut and raised toward the upper surface 21 and are opposed to each other in the width direction, at a position substantially in the center in the width direction of the bottom surface 23. 36 is provided at a predetermined position in the longitudinal direction.

As shown in FIG. 2, the upper rail 40 is a plate-like member disposed so as to extend in the front-rear direction of the vehicle, and lower end portions 41 and 42 that are folded upward in the longitudinal direction by bending are provided. Are inserted into the lower rail 20. Accordingly, the upper rail 40 is supported so that the lower end portions 41 and 42 can move relative to the lower rail 20 in the front-rear direction while sliding through the inner surface of the lower rail and the balls. Two movement restricting plates (movement restricting portions) 45 and 46 are fixed at predetermined positions in the longitudinal direction of the lower end portions 41 and 42 of the upper rail 40 so as to extend in the width direction (left and right direction), respectively. A plurality of engagement holes 50 are formed in the lower end portion 42 at the same pitch as the lock holes 30 of the lower rail 20.

In the seat track device 10, the upper rail 40 supported by the lower rail 20 is relatively movable in the vehicle front-rear direction, and the movement restriction plate 45 is cut and raised, or the movement restriction plate 46 is cut and raised. The movement range is regulated by abutting on 36. Here, the positions of the cut-and-raised portions 35 and 36 and the movement restricting plates 45 and 46 can be arbitrarily determined based on the specification of the vehicle on which the seat track device 10 is provided, particularly the seat movable range.

As shown in FIG. 3, the lock structure 60 includes a lock lever bracket 70, a lock lever 80, and a spring member 90.

The lock lever bracket 70 is formed by bending a single metal plate, and is provided at a substantially central position 43a (see FIG. 5) of the upper rail 43 of the upper rail 40 by rivets inserted into a pair of mounting holes 71a and 71b provided on the upper surface 71 thereof. 2). The lock lever bracket 70 is bent in two stages from the upper surface 71 to the intermediate surface 72 and the lower surface 73 so as to follow the outer surface shape of the upper surface 21 and the side surface 22 of the lower rail 20. A plurality of through holes 73 a are formed at the same pitch as the lock holes 30 of the lower rail 20. A pair of support portions 75 and 76 for supporting the lock lever 80 are provided at the left and right ends of the intermediate surface 72 connecting the upper surface 71 and the lower surface 73 so as to be parallel to each other. Of these support portions 75 and 76, the support portion 75 disposed on the front side is provided with a first hollow shaft portion 75a that protrudes outward (toward the front side) by burring. On the other hand, the support portion 76 disposed on the rear side is provided with a first bearing hole portion 76a penetrating therethrough so as to be coaxial with the first hollow shaft portion 75a.

The lock lever 80 is formed by bending a single metal plate, and a pair of supported portions 85 and 86 that are bent so as to be parallel to each other are provided at both ends of the body surface 81 extending in the front-rear direction. Yes. The lower surface bent so as to extend in the left-right direction has four lock claws 82 arranged at the same pitch as the through holes 73 a and the lock holes 30. Of the supported portions 85 and 86, the supported portion 86 disposed on the rear side is provided with a second hollow shaft portion 86a formed so as to protrude outward (to the rear side) by burring. . On the other hand, in the supported portion 85 disposed on the front side, a second bearing hole portion 85a penetrating so as to be coaxial with the second hollow shaft portion 86a is formed. The second hollow shaft portion 86a has an outer diameter that can be slidably inserted into the first bearing hole portion 76a. The second bearing hole portion 85a has an inner diameter that allows the first hollow shaft portion 75a to slide and rotate. It has an inner diameter that can be inserted. The interval between the supported portions 85 and 86 is such that when the supported portion 85 and the support portion 75 are brought into contact with each other so that the first hollow shaft portion 75a protrudes from the second bearing hole portion 85a, the support portion 86 and the support portion 86 are supported. When the support portion 76 and the supported portion 86 are brought into contact with each other so that the portion 76 is separated from the first 76 or so that the second hollow shaft portion 86a protrudes from the first bearing hole portion 76a, It is preferable to set so that the support part 85 is separated. Further, the supported portion 85 is provided with a plate-like lock release piece 83 protruding to the front side and a plate-like spring holding piece 84 protruding to the rear side. The spring holding piece 84 is inserted into the main body 91 wound in a hollow cylindrical shape among the spring members 90 made of a metal wire, and holds the spring member 90. Arm portions 92 and 93 extend from both ends of the main body portion 91. The first hollow shaft portion may be provided in the rear support portion 76, and the first bearing hole portion may be provided in the front support portion 75. In this case, the second bearing hole portion is provided in the rear supported portion 86 and the second hollow shaft portion is provided in the front supported portion 85 so as to protrude forward (outward).

The assembly of the lock lever bracket 70, the lock lever 80, and the spring member 90 to the lower rail 20 and the upper rail 40 will be described with reference to FIGS. First, the lock lever bracket 70 is fixed to the upper rail 40 by a pair of rivets. Subsequently, the first hollow shaft portion 75a is inserted into the second bearing hole portion 85a, and the second hollow shaft portion 86a is inserted into the first bearing hole portion 76a. At this time, the interval between the supported portions 85 and 86 is such that the supported portion 86 and the support portion 76 are separated from each other when the supported portion 85 and the support portion 75 are brought into contact with each other. When the supported portion 86 is brought into contact, the support portion 75 and the supported portion 85 are separated from each other, and the support portion 75 and the support portion 76 or the supported portion 85 and the supported portion 86 are elastic. This is preferable because it can be inserted without being deformed. Next, caulking is performed on the first hollow shaft portion 75a protruding from the second bearing hole portion 85a so that the support portion 75 and the supported portion 85 are in contact with each other (FIG. 3C). On the other hand, the second hollow shaft portion 86a is left protruding from the first bearing hole portion 76a without being caulked. As described above, by caulking the protruding portion from the second bearing hole 85a or the first bearing hole 76a with respect to one of the first hollow shaft portion 75a and the second hollow shaft portion 86a, the lock lever 80 is moved to the lock lever. In addition to preventing the bracket 70 from coming off, it is possible to reliably prevent rattling between the lock lever bracket 70 and the lock lever 80 while allowing the lock lever 80 to rotate relative to the lock lever bracket 70. it can. The first hollow shaft portion 75a is not caulked, and the support portion 76 and the supported portion 86 are in contact with the second hollow shaft portion 86a protruding from the first bearing hole portion 76a. Caulking may be performed.

Subsequently, the body portion 91 of the spring member 90 is extrapolated to the spring holding piece 84 so that the arm portion 92 is brought into contact with the upper surface 71 of the lock lever bracket 70 and the arm portion 93 is brought into contact with the body surface 81 of the lock lever 80. . The lock lever 80 is urged in the direction in which the lock claw 82 is inserted into the through hole 73 a by the elasticity of the spring member 90, and the lock lever 80 is prevented from being detached from the lock lever bracket 70. At this time, the lock claw 82 is further inserted into the lock hole 30 of the lower rail 20, and the tip is inserted into the engagement hole 50 of the upper rail 40. As a result, the lower rail 20 is locked with respect to the upper rail 40 (FIG. 5A). In FIG. 5A, the supported portion 85 is omitted.

A handle lever (not shown) that is rotatable about a support shaft provided in front of the lock structure 60 is attached to the upper rail 40. The rear end of the handle lever is biased downward so as to come into contact with the unlocking piece 83. When the rear end is further moved downward, the rear end presses the unlocking piece 83 downward. . Thereby, the lock lever 80 rotates, the engagement between the lock claw 82 and the lock hole 30 is released, and the locked state between the lower rail 20 and the upper rail 40 is released (FIG. 5B). In the unlocked state, the upper rail 40 supported by the lower rail 20 can be relatively moved in the longitudinal direction of the vehicle, but the movement restricting plate 45 is cut and raised, or the movement restricting plate 46 is cut and raised. (See FIG. 5C), the movement range of the upper rail 40 relative to the lower rail 20 is regulated. Since the handle lever and its support structure are well known, illustration is omitted.

As described above, according to the present embodiment, a protruding portion from the second bearing hole 85a or the first bearing hole 76a is caulked with respect to one of the first hollow shaft portion 75a and the second hollow shaft portion 86a. Because of the processing, rattling between the lock lever bracket 70 and the lock lever 80 can be reliably prevented. Furthermore, since it is not necessary to separately provide a retaining member for preventing the lock lever 80 from coming off the lock lever bracket 70, the number of parts can be reduced. Further, since only one of the first hollow shaft portion 75a and the second hollow shaft portion 86a is caulked, the slidability of the lock lever 80 with respect to the lock lever bracket 70 is dimensional variation as compared to bending. It is only necessary to adjust the plate thickness with a small thickness and can be easily stabilized. Furthermore, a predetermined gap is provided between the lock lever 80 and the lock lever bracket 70 on the non-caulking side of the first hollow shaft portion 75a and the second hollow shaft portion 86a, whereby the lock lever 80 or the influence of the plate thickness or distortion of the lock lever bracket 70 can be suppressed, and the slidability of the lock lever 80 with respect to the lock lever bracket 70 can be further stabilized. Moreover, since it is not necessary to provide the support portions 75 and 76 with a configuration for introducing the lock lever 80 between them, the number of processing steps can be reduced.

In the above-described embodiment, the cut-and-raised portions 35 and 36 are provided on the lower rail 20, and the movement restricting plates 45 and 46 are provided on the upper rail 40, but instead of these, a contact plate portion (stopper portion) is provided on the lower rail 20. ) 25c and 26c may be provided, and the upper rail 40 may be provided with cut-and-raised parts (movement restricting parts) 47a, 47b, 48a and 48b. The contact plate portions 25c and 26c are formed by notching the notch portions 25a and 25b and the notch portions 26a and 26b by notching the both ends in the front-rear direction of the upper rail pressing surfaces 25 and 26 formed by folding the upper surface 21 inward. By forming, each is formed (FIG. 6). The contact plate portions 25c and 26c are preferably formed in the corresponding positions in the front-rear direction by the corresponding length. On the other hand, the cut-and-raised portions 47a, 47b, 48a, and 48b cut and raise the side surfaces 47 and 48 so as to protrude outward (in the left-right direction) at predetermined positions in the front-rear direction of the side surfaces 47 and 48 extending in the vertical direction. To form. Here, it is preferable that the cut and raised portion 47a and the cut and raised portion 48a, and the cut and raised portion 47b and the cut and raised portion 48b are respectively formed at corresponding positions in the front-rear direction (FIG. 7). In this configuration, when the unlocked state is established, the cut-and-raised portion 47a and the cut-and-raised portion 48a come into contact with the front end portions of the contact plate portions 25c and 26c, respectively, or the cut-and-raised portion 47b and the cut and raised portion. Since the part 48b abuts on the rear end portions of the abutting plate parts 25c and 26c, the range of movement of the upper rail 40 relative to the lower rail 20 can be restricted.

Further, as shown in FIG. 8A, instead of the first bearing hole portion 76a, a hollow shaft portion 176a that projects forward coaxially with the first hollow shaft portion 75a is provided, and a second hollow shaft portion 86a is provided. Instead, a bearing hole portion 186a penetrating so as to be coaxial with the second bearing hole portion 85a may be provided. In this case, the first hollow shaft portion 75a is inserted into the second bearing hole portion 85a, and the hollow shaft portion 176a is inserted into the bearing hole portion 186a. Both the first hollow shaft portion 75a and the hollow shaft portion 176a can be protruded in the rearward direction.

Further, as shown in FIG. 8B, instead of the first hollow shaft portion 75a, a bearing hole portion 175a penetrating so as to be coaxial with the first bearing hole portion 76a is provided, and a second bearing hole portion 85a is provided. Instead, a hollow shaft portion 185a that protrudes backward coaxially with the second hollow shaft portion 86a may be provided. In this case, the hollow shaft portion 185a is inserted into the bearing hole portion 175a, and the second hollow shaft portion 86a is inserted into the first bearing hole portion 76a. Both the hollow shaft portion 185a and the second hollow shaft portion 86a can be protruded in the forward direction.

In the above description, the lock lever bracket 70 is attached to the upper rail 40, and the lock claw 82 of the lock lever 80 is engaged with the engagement hole 50 of the upper rail 40 through the lock hole 30 of the lower rail 20. Alternatively, the lock lever bracket 70 may be attached to the lower rail 20 (for example, the bottom surface), and the lock claw 82 may be engaged with the engagement hole 50 of the upper rail 40 via the lock hole 30 of the lower rail 20.

Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and can be improved or changed within the scope of the purpose of the improvement or the idea of the present invention.

It is a perspective view which shows the structure of the lower rail which concerns on embodiment of this invention. It is a perspective view which shows the structure of the upper rail which concerns on embodiment of this invention. (A) is a disassembled perspective view which shows the structure of the lock structure concerning embodiment of this invention, (b) is a perspective view which shows the state after an assembly, (c) is a lock lever with respect to a lock lever bracket. It is an enlarged longitudinal cross-sectional view which shows the state of the process part after crimping. (A) is a top view which shows the structure of the seat track apparatus which concerns on embodiment of this invention, (b) is the side view. (A) is sectional drawing along the VA-VA line of FIG.4 (b), and is a figure which shows a locked state, (b) is sectional drawing along the VB-VB line | wire of FIG.4 (b). It is a figure which shows an unlocking state, (c) is sectional drawing along the VC-VC line of FIG.4 (b). It is a perspective view which shows the structure of the lower rail which concerns on the modification of embodiment of this invention. It is a perspective view which shows the structure of the upper rail which concerns on the modification of embodiment of this invention. It is a disassembled perspective view which shows the structure of the lock structure which concerns on the modification of embodiment of this invention.

Explanation of symbols

10 Seat Track Device 20 Lower Rail 25c Contact Plate (Stopper)
26c Contact plate (stopper)
35 Cut and raised part (stopper part)
36 Cut and raised part (stopper part)
40 Upper rail 45 Movement restriction plate (movement restriction part)
46 Movement restriction plate (movement restriction part)
47a Cut and raised part (movement restriction part)
47b Cut and raised part (movement restriction part)
48a Cut and raised part (movement restriction part)
48b Cut and raised part (movement restriction part)
60 lock structure 70 lock lever bracket 75 support portion 75a first hollow shaft portion 76 support portion 76a first bearing hole portion 80 lock lever 85 supported portion 85a second bearing hole portion 86 supported portion 86a second hollow shaft portion 90 spring Element

Claims (6)

A lower rail fixed to the vehicle floor;
An upper rail fixed to the vehicle seat and movable along the lower rail;
One of the pair of support portions fixed to one of the lower rail and the upper rail and facing each other has a first bearing hole portion, and the other has a first hollow shaft portion coaxially projecting outward. A formed lock lever bracket;
A second hollow shaft portion is formed on one of a pair of supported portions facing each other so as to protrude outward, and a second bearing hole portion is formed coaxially on the other side, and the first bearing hole portion includes the second hollow shaft portion. By fitting the second hollow shaft portion and fitting the first hollow shaft portion to the second bearing hole portion, the lower rail and the upper rail are supported rotatably with respect to the lock lever bracket. A lock lever capable of locking the upper rail so that it cannot move by being locked to the other of the two,
A seat track device comprising:
The seat track device according to any one of the first hollow shaft portion and the second hollow shaft portion, wherein a protruding portion from the second bearing hole portion or the first bearing hole portion is caulked. A lower rail fixed to the vehicle floor;
An upper rail fixed to the vehicle seat and movable along the lower rail;
A lock lever bracket having a pair of support portions fixed to one of the lower rail and the upper rail and facing each other;
A lock lever having a pair of supported portions facing each other;
A seat track device comprising:
One of the pair of support portions and the pair of supported portions is provided with a first hollow shaft portion and a second hollow shaft portion formed so as to protrude coaxially in the same direction, and the other includes 1 bearing hole part and 2nd bearing hole part are provided coaxially,
The lock lever is configured to fit the second hollow shaft portion into the first bearing hole portion, and to fit the first hollow shaft portion into the second bearing hole portion, thereby It is supported so that it can rotate, and the upper rail can be locked so as not to move by being engaged with the other of the lower rail and the upper rail.
The seat track device according to any one of the first hollow shaft portion and the second hollow shaft portion, wherein a protruding portion from the second bearing hole portion or the first bearing hole portion is caulked. The support part or the supported part provided with the other of the first hollow shaft part and the second hollow shaft part not caulked; and
The support part or the supported part provided with the second bearing hole part or the first bearing hole part into which the other of the first hollow shaft part and the second hollow shaft part is fitted is spaced from the support part. The seat track device according to claim 1 or 2, wherein the seat track device is disposed. The seat track device according to any one of claims 1 to 3, wherein the first hollow shaft portion and the second hollow shaft portion are formed by burring. A stopper portion that is cut and raised from the floor portion to the upper rail side is formed at substantially the center of the lower rail,
The seat according to any one of claims 1 to 4, wherein the upper rail is provided with a movement restricting portion that restricts a movement amount of the upper rail with respect to the lower rail by contacting the stopper portion. Truck equipment. Near the front end portion and the rear end portion of the upper rail, a movement restricting portion that is cut and raised is formed, and the lower rail moves to the lower rail by contacting the movement restricting portion. The seat track device according to any one of claims 1 to 4, further comprising a stopper portion that regulates the movement.

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