JP4094925B2 - Lifter for vehicle seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lifter for adjusting the height of a vehicle seat.
[0002]
[Prior art]
5 and 6 are configuration diagrams of a conventional lifter (see Patent Document 1). The lifter supports a front connection shaft 2 and a rear connection shaft 3 so that the front connection shaft 2 and the rear connection shaft 3 are rotatably supported by a pair of left and right rails 1 and 1 fixed on the floor surface. A lever 4 is fixed to both ends of the front connecting shaft 2, the lever 4 is pivotally attached to a bracket 6 suspended from the front lower surface of the seat 5, and a lever 7 is fixed to both ends of the rear connecting shaft 3. An L-shaped lever 9 is pivotally supported on a bracket 8 provided on the rear upper surface of the rail 1, one end of the L-shaped lever 9 and the lever 7 are connected by a link bar 10, and the L-shaped lever 9 is further connected. The other end is pivotally attached to a bracket 11 that hangs down from the rear lower surface of the seat 5.
[0003]
Further, a drive mechanism 12 for rotating the rear connection shaft 3 is rotatably supported on the front connection shaft 2, and a drive mechanism 13 for rotating the front connection shaft 2 is rotatably supported on the rear connection shaft 3.
[0004]
That is, the drive mechanism 12 that rotates the rear connection shaft 3 has a U-shaped bracket 14 that is rotatably fitted to the front connection shaft 2 and a gear box 15 is fixed to the rear surface of the bracket 14. A motor 16 is attached to the side surface of the box 15, and the screw rod 17 protruding rearward from the gear box 15 is rotated by the motor 16. The screw rod 17 rotates between the brackets 18, 18 of the rear connecting shaft 3. The nut member 19 is screwed to the possible attachment. On the other hand, the drive mechanism 13 for rotating the front connecting shaft 2 has a U-shaped bracket 20 rotatably fitted on the rear connecting shaft 3, and a gear box 21 is fixed to the front surface of the bracket 20. A motor 22 is attached to the side surface of the box 21, and a screw rod 23 protruding forward from the gear box 21 is rotated by the motor 22. The screw rod 23 is interposed between the brackets 24, 24 of the front connecting shaft 2. The nut member 25 is rotatably attached to the nut member 25.
[0005]
When the screw rod 17 is rotated by driving the motor 16, the rear connecting shaft 3 rotates correspondingly by pulling or pushing the bracket 18, and the rotation of the rear connecting shaft 3 is the lever 7 and the link bar 10. Then, it is transmitted to the rear part of the sheet 5 via the lever 9 and the rear part of the sheet 5 is raised or lowered. Further, when the screw rod 23 is rotated by driving the motor 22, the front connection shaft 10 is rotated via the bracket 24, and this rotation is transmitted to the front portion of the seat 5 via the lever 4. Raise or lower part. In these operations, the brackets 14 and 20 are rotatably supported by the connecting shafts 2 and 3, and the nut members 19 and 25 are rotatably supported by the brackets 18 and 24. Absent.
[0006]
[Patent Document 1]
Japanese Examined Patent Publication No. 6-43177 [0007]
[Problems to be solved by the invention]
Since the conventional lifter needs to be commercialized with the front connecting shaft 2 and the rear connecting shaft 3 assembled to the rails 1 and 1, there is a problem that a handled product is easily bulky. In addition, when the rail is handled as a separate product, an assembly in which the drive mechanisms 12 and 13 are simply attached to the front connecting shaft 2 and the rear connecting shaft 3 is handled as a product. There was a problem that the sex became worse.
[0008]
In view of the above circumstances, an object of the present invention is to provide a lifter for a vehicle seat that is not particularly bulky and can be commercialized in a form that is easy to handle.
[0009]
[Means for Solving the Problems]
The invention according to claim 1, each front and rear of the vehicle seat via a lever connected to the front coupling shaft and the rear coupling shaft, by rotating the driving mechanism of the respective connecting shafts, the front portion of the seat And in the lifter of the vehicle seat that adjusts the height of the rear part,
A front connecting shaft, a first bracket rotatably fitted on the front connecting shaft and having a tip rotatably engageable with the rear connecting shaft; and an operating member fixed to the first bracket and having an operating member thereof A first drive mechanism engageable with the front side assembly,
The rear connecting shaft and the first bracket are second brackets provided at positions that are substantially symmetrical with respect to the left and right, and are rotatably fitted to the rear connecting shaft and the front ends thereof are rotatably engaged with the front connecting shaft. A rear side assembly comprising: a second possible bracket; and a second drive mechanism secured to the second bracket and having an actuating member engageable with the front coupling shaft;
The operating member of the first drive mechanism of the front side assembly is used as the rear connection shaft of the rear side assembly while the front end of the first bracket of the front side assembly is engaged with the rear connection shaft of the rear side assembly. It is engaged with the rear side assembly second front-side group the actuating member of the second drive mechanism of the rear-side assembly with the front end of the bracket to engage the front coupling shaft of the front side assembly of A coupling member that integrally couples the front-side assembly and the rear-side assembly by coupling the left and right brackets in a state of being engaged with a three-dimensional front coupling shaft ;
It is characterized by providing .
[0010]
Lifter of the present invention, the front side and respectively the rear side, the connecting shaft and the bracket and the front-side assembly combines a drive mechanism and a rear-side assembly separately prepared, they front and rear of the assembly By simply combining the two, it can be configured easily. This can be realized by keeping the tip of the bracket detachably engaged with the mating coupling shaft and detachably coupling the actuating member of the drive mechanism to the mating coupling shaft. It is to become. However, when the convenience of assembling is thus achieved, there is a possibility that when the front and rear assemblies are simply combined, they are handled as products. Therefore, in the present invention, both brackets are connected by a connecting member. By doing so, both the front side assembly and the rear side assembly are simply combined with each other and are integrally coupled to each other. Therefore, it becomes possible to handle the package as an integrated product while maintaining the assembled state with certainty, thereby improving the handleability. That is, since the front side assembly and the rear side assembly do not fall apart even when they are not assembled to the rail, not only the handleability but also the subsequent assembly of the lifter is improved. Moreover, since it can commercialize in the state which is not assembled | attached to a rail, it can handle in a compact form without being bulky.
[0011]
Further, since the bracket is pivotally attached to the connecting shaft, it is in a state where it is easily rattled. This looseness tends to cause an interference sound when the drive mechanism is operated and the mating connecting shaft is rotated. In this regard, in the present invention, the left and right brackets are connected to each other, thereby restricting the movement of the brackets and preventing the generation of a rattling sound.
[0012]
The invention of claim 2 is characterized in that, in claim 1, the connecting member is bent in a dogleg shape in the front-rear direction at an intermediate portion in the length direction.
[0013]
When the connecting member is bent as in the present invention, for example, the wire harness can be guided to a predetermined position by the bent portion.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a configuration diagram of a lifter according to an embodiment, and is a perspective view showing a state during assembly. FIG. 2 is a configuration diagram of the lifter of the embodiment, and is a perspective view showing a state after assembly.
FIG. 3 is a plan view showing a state after the lifter is assembled, and FIG. 4 is a view taken along the line III-III in FIG.
[0016]
As shown in FIG. 1, the lifter 50 includes a front connecting shaft 51 and a rear connecting shaft 52, and brackets 53 and 54 that are rotatably attached (externally fitted) to the connecting shafts 51 and 52, respectively. The front side assembly 50F is composed of these parts, and includes drive mechanisms 55 and 56 attached to the brackets 53 and 54, and arms 57 and 58 fixed to the connection shafts 51 and 52, respectively. And the rear side assembly 50R are combined with each other and then connected by a connecting rod (connecting member) 100.
[0017]
The front side assembly 50 </ b> F has a first bracket 53 attached (externally fitted ) to one end side (right end side when viewed from the front) of the front connecting shaft 51, and a rear portion attached to the first bracket 53. A first drive mechanism 55 for rotating the connection shaft 52 is attached, and an arm 57 is fixed to the other end side (the left end side when viewed from the front) of the front connection shaft 51, and the rear side assembly 50R. The second bracket 54 is attached (externally fitted ) to the other end side (left end side when viewed from the front) of the rear connection shaft 52, and the front connection shaft 51 is rotated to the second bracket 54. The second drive mechanism 56 is attached to the rear connection shaft 52, and an arm 58 is fixed to one end side (right end side when viewed from the front) of the rear connection shaft 52.
[0018]
A lever 61 for connecting to the front portion of the vehicle seat is provided at both ends of the front connecting shaft 51, and the both ends of the rear connecting shaft 52 are connected to the rear portion of the vehicle seat via a link or the like. A lever 62 is provided.
[0019]
The brackets 53 and 54 are arranged at positions that are separated from each other and are substantially symmetrical, and each is configured as an L-shaped crank lever having long arms 53a and 54a and short arms 53b and 54b, and is connected at a bent portion. The shafts 51 and 52 are rotatably attached. The distal ends of the long arms 53a and 54a are formed in a U shape so as to be detachably engageable with the connecting shafts 52 and 51 on the other side, and drive mechanisms 55 and 56 are disposed at the distal ends of the short arms 53b and 54b. A pin 59 is rotatably attached.
[0020]
The drive mechanisms 55 and 56 include a gear box 71 rotatably supported by the pin 59, a screw rod 72 extending from the gear box 71 in a direction perpendicular to the mating connecting shafts 52 and 51, and a gear box 71. A motor 73 that rotates the screw rod 72 by applying input rotation is provided, and a nut member 74 that is screwed to the tip of the screw rod 72. On both side portions of the nut member 74, engagement pins 75 are provided so as to fit into the engagement grooves 57a and 58a of the arms 57 and 58 fixed to the connection shafts 51 and 52.
[0021]
When assembling the lifter 50, first, the front side assembly 50F and the rear side assembly 50R are individually assembled as shown in FIG. Since the front side assembly 50F and the rear side assembly 50R have almost the same structure, they can be easily assembled. Front side assembly 50F includes a first bracket 53 pivotally attached to the front connection shaft 51, by attaching the gearbox 71 of the first drive mechanism 55 to the first bracket 53 that, the assembly Can be completed. Rear assembly 50R is the mounting second bracket 54 pivotally to the rear connection shaft 52, by attaching to the second bracket 54 to the gear box 71 of the second drive mechanism 56 to complete the assembly be able to.
[0022]
Next, as shown in FIG. 2, the front side assembly 50F and the rear side assembly 50R are combined with each other. That is, the front end of the long arm 53a of the first bracket 53 attached to the front connection shaft 51 is detachably engaged with the rear connection shaft 52, and in this state, the first bracket attached to the first bracket 53 is attached. The engagement pin 75 of the nut member 74 of the drive mechanism 55 is fitted into the engagement groove 58 a of the arm 58 fixed to the rear connection shaft 52. At the same time, the tip of the long arm 54a of the second bracket 54 attached to the rear connection shaft 52 is detachably engaged with the front connection shaft 51, and in this state, the second bracket 54 attached to the second bracket 54 is attached . The engaging pin 75 of the nut member 74 of the driving mechanism 56 is fitted into the engaging groove 57 a of the arm 57 fixed to the front connecting shaft 51.
[0023]
Then, the left and right brackets 53 and 54 are connected to each other by fastening both ends of the connecting rod 100 extending in the left and right direction to the screw holes 101 of the brackets 53 and 54 separated from each other with the bolts 102. Thereby, the integral lifter 50 is completed. In this case, the connecting rod 100 is bent in a dogleg shape that is convex toward the front side in the middle in the length direction.
[0024]
As shown in FIG. 3, for example, this is useful for guiding the wire harness 130 that extends vertically between the front and rear connecting shafts 51, 52 as close to the front as possible. The lifter 50 is covered with a seat cushion frame, and the wire harness 130 must be passed through the gap with the seat cushion frame. However, the bending of the connecting rod 100 can adjust the position of the wire harness 130 toward the front side, for example. Therefore, it becomes possible to pass the wire harness at a position with a margin in the gap. Of course, the connecting rod 100 may be straight, but the wire harness 130 can be routed through an unreasonable route without using a special guide means by simply giving the connecting rod 100 a bend. The significance of giving it comes out.
[0025]
When this lifter 50 is used, both ends of the front connecting shaft 51 and both ends of the rear connecting shaft 52 are rotatably connected to the rail 150, and the levers 61 and 62 are connected to the front and rear portions of the vehicle seat. To do. Thereby, by driving the motor 73 of the drive mechanisms 55 and 56, the front connection shaft 51 or the rear connection shaft 52 is rotated, so that the front part or the rear part of the seat can be moved up and down independently. Become.
[0026]
As described above, the lifter 50 can be configured simply by preparing and combining the front side assembly 50F and the rear side assembly 50R separately. In this case, there is a possibility that the front and rear assemblies 50F and 50R are simply combined, but there is a possibility that both the brackets 53 and 54 are connected by the connecting rod 100. Even when the three-dimensional 50F and the rear assembly 50R are not assembled to the rail 150, they do not fall apart, and the handleability and subsequent assembly of the lifter 50 are improved.
[0027]
Further, since the brackets 53 and 54 are rotatably attached to the connecting shafts 51 and 52, the brackets 53 and 54 are in a state where they are somewhat loose. This backlash tends to cause an interference sound when the driving mechanisms 55 and 56 are operated to rotate the connecting shafts 52 and 51 on the other side. However, in the lifter 50 described above, the left and right brackets 53 and 54 Since the movement of both the brackets 53 and 54 is regulated by connecting the two to each other with the connecting rod 100, it is possible to prevent the generation of a rattling sound.
[0028]
【The invention's effect】
As described above, according to the invention of claim 1, since the brackets to which each drive mechanism is attached are connected by the connecting member, it can be easily assembled in a non-bulky form without rails without worrying about falling apart, The handling can be improved. Moreover, since both the brackets are connected, the movement of the brackets can be restricted, and the generation of a rattling sound can be prevented.
[0029]
According to the invention of claim 2, since the connecting member for connecting the brackets is bent in the shape of a dogleg in the front-rear direction at the intermediate portion in the length direction, the wire harness is placed at a predetermined position at the bent portion, for example. I can guide you.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a lifter according to an embodiment of the present invention, and is a perspective view showing a state during assembly.
FIG. 2 is a configuration diagram of a lifter according to an embodiment of the present invention, and is a perspective view showing a state after assembly.
FIG. 3 is a plan view showing a state after the lifter is assembled.
4 is a view taken in the direction of arrows III-III in FIG. 3;
FIG. 5 is a side view of a conventional lifter.
FIG. 6 is a plan view of a conventional lifter.
[Explanation of symbols]
50 Lifter
50F Front side assembly
50R Rear side assembly 51 Front connection shaft 52 Rear connection shaft 53 First bracket 54 Second bracket 55 First drive mechanism 56 Second drive mechanism 61, 62 Lever 100 Connection rod (connection member)

Claims (2)

Respectively connected to the front coupling shaft and rear connecting shaft front and rear of the vehicle seat via a lever, by rotating the respective connecting shafts drive mechanism to adjust the front and rear of the seat height In the lifter for vehicle seats,
A front connecting shaft, a first bracket rotatably fitted on the front connecting shaft and having a tip rotatably engageable with the rear connecting shaft; and an operating member fixed to the first bracket and having an operating member thereof A first drive mechanism engageable with the front side assembly,
The rear connecting shaft and the first bracket are second brackets provided at positions that are substantially symmetrical with respect to the left and right, and are rotatably fitted to the rear connecting shaft and the front ends thereof are rotatably engaged with the front connecting shaft. A rear side assembly comprising: a second possible bracket; and a second drive mechanism secured to the second bracket and having an actuating member engageable with the front coupling shaft;
The operating member of the first drive mechanism of the front side assembly is used as the rear connection shaft of the rear side assembly while the front end of the first bracket of the front side assembly is engaged with the rear connection shaft of the rear side assembly. It is engaged with the rear side assembly second front-side group the actuating member of the second drive mechanism of the rear-side assembly with the front end of the bracket to engage the front coupling shaft of the front side assembly of A coupling member that integrally couples the front-side assembly and the rear-side assembly by coupling the left and right brackets in a state of being engaged with a three-dimensional front coupling shaft ;
Vehicle lifter seat, characterized in that it comprises a.   2. The lifter for a vehicle seat according to claim 1, wherein the connecting member is bent in a dogleg shape in the front-rear direction at an intermediate portion in the length direction thereof.

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