JPH053030U - Weight adjustment mechanism handle stopper - Google Patents

Abstract

(57) [Abstract] [Purpose] To limit the rotation operation range of the operation handle of the weight adjustment mechanism provided in the seat suspension device without reducing workability. [Structure] The handle stopper 10 is formed in a length corresponding to a mounting stroke L2 for mounting a biasing means within a predetermined movement range of the nut 44 with respect to the lead screw 16. And the handle stopper 10
Is fitted to the corresponding position of the lead screw 16 after the attaching process of the biasing means, and restricts the movement of the nut 44 into the attaching stroke L2, thereby limiting the rotation operation range of the operation handle 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  This invention is an operation handle for a weight adjustment mechanism provided in a seat suspension device. The present invention relates to a handle stopper of a weight adjusting mechanism that limits a rotation operation range of a dollar.

[0002]

[Prior art]

  For example, the seat is placed under the upward biasing force (suspension force). The upper frame is elastically supported with respect to the lower frame, and shocks and vibrations transmitted to the floor are damped. The seat suspension system can be used for vehicle seats, such as truck seats. It is installed.

[0003]   In such a seat suspension device, the upper frame is, for example, a front end and a rear end. Attached to the lower frame via a substantially X-shaped expandable link with either end being the movable end The upper frame, that is, the seat, is normally biased upward by the biasing force from the biasing means. It is energized.

[0004]   As the urging means, for example, erection or tension between a predetermined locking piece and the movable end of the link is possible. A tension coil spring can be used to keep the distance between the locking piece and the movable end of the link almost constant. The urging force from the tension coil spring that acts in this way is transmitted to the upper frame via the link. It is possible.

[0005]   Here, for example, by rotating the operation handle or the like, the position of the locking piece is moved forward and backward. Equipped with a weight adjustment mechanism that allows you to adjust the height of the upper frame relative to the lower frame The composition is known.

[0006]   In such a configuration, the weight adjustment mechanism may include, for example, a lead screw and a lever. And a lead screw It is formed with the operation handle at the front end, and the nut can be linked with the locking piece. It is provided. Then, the lead screw of the operation handle is rotated. Rotation moves the nut in the front-back direction of the lead screw, and the locking piece links. It is possible to move in the front-back direction with its movable end.

[0007]   In such a configuration, depending on the load acting on the seat, that is, the weight of the seated person, , By rotating the operation handle to adjust the front and rear position of the movable end of the link. Thus, the height of the seated person's viewpoint (eye point) can be set substantially constant.

[0008]

[Problems to be solved by the device]

  By the way, when assembling the seat suspension device as described above, Normally, the tension coil spring (biasing means) is released after the assembly process of the link, weight adjustment mechanism, etc. It is installed between the movable end of the link and the locking piece.

[0009]   Here, the weight adjustment straw of the nut for the preset lead screw In the chamber, the tension coil spring is pulled so that it is pulled under a predetermined traction force. The movable end and the locking piece are separated from each other by a certain distance or more. So in this case In this case, the worker is required to work while pulling the tension coil spring. The erection work (attachment work) of the tension coil spring becomes complicated, which is not preferable.

[0010]   Therefore, in the known configuration, the weight adjustment sleeve to which the nut is moved during weight adjustment. A mounting stroke is provided further behind the trowel to exceed the weight adjustment stroke. By moving the nut that moves, the gap between the movable end of the link and the locking The work of mounting the coil spring is facilitated.

[0011]   However, in such a configuration, even when adjusting the weight, the operation As the nut rotates, the nut exceeds the weight adjustment stroke and the mounting stroke Easily moved into the lok. The operating handle is usually in a position suitable for your weight. It is formed with a scale that serves as a setting reference so that it can be easily adjusted. However, excessive rotation cannot be prevented.

[0012]   Such excessive rotation of the operating handle beyond the adjustment range is The suspension force from the spring is reduced, and the movable end of the link If it becomes too narrow, the tension of the tension coil spring may cause the locking pieces and links to The tension coil spring may come off from the moving end, which is not preferable.

[0013]   This invention limits the rotation operation range of the operation handle without reducing workability. The purpose is to provide a handle stopper for a weight adjustment mechanism that can be set.

[0014]

[Means for Solving the Problems]

  In order to achieve this object, according to the present invention, after the attaching process of the biasing means, The handle stopper that can be attached to the Within the range of movement of the nut with respect to the Liu, the mounting stroke for mounting the biasing means. It has a length equivalent to that of a rooke. And installation on the lead screw Prevents the nut from moving within the mounting stroke, Limited range of operation.

[0015]

【Example】

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0016]   As shown in FIGS. 1 and 2, the handle stopper 10 of the weight adjusting mechanism according to the present invention. Attached to the lead screw 16 of the weight adjustment mechanism 14 which has the operation handle 12 at the front end. It is molded so that it can be removed.

[0017]   The weight adjusting mechanism 14 includes, for example, a seat suspension device 18 as shown in FIG. The movable end 20 of the link 20 of the seat suspension device with respect to the base end 20a. The front and rear positions of b are adjustable.

[0018]   As can be seen clearly in FIG. 3, the seat suspension device 18 includes, for example, Upper frame (upper frame) 22 on which the seat is placed and lower frame 〓 that is attached to the vehicle floor, etc. Equipped with an expandable link 20 assembled in a substantially X shape between the (lower frame) 24 I am.

[0019]   The links 20, for example, are arranged on the left and right sides between the upper frame 22 and the lower frame 24, Between the left and right sides of the front and rear ends of the link are (front) connecting rods 26,2. 7, and (rear) connecting rods 30 and 31 are connected so that they can be interlocked. Has been.

[0020]   Here, for example, the front end of such a link 20 is connected to the upper frame 22 and the lower frame 24, respectively. It is rotatably mounted and is formed as the base end 20a of the link. And The rear end of the link 20 is formed as the movable end 20b of the link with respect to the base end (front end) 20a. Has been.

[0021]   For example, the roller 34 that can roll in the front-back direction inside the upper frame 22 and the lower frame 24 is The movable ends of the links (rear End) 20b is attached to the inside of the upper and lower frames so as to be movable in the front-back direction. It

[0022]   According to this structure, the connecting rods 26 and 30 of the upper frame and the connecting rods of the lower frame are connected. The change in the distance between the cutting rods 27 and 31 causes a change in the movable end 20 relative to the base end 20a of the link. This is guaranteed by the movement of b, and the expansion and contraction of the link 20 in the vertical direction is secured.

[0023]   Here, for example, the extending end 36 is formed above the movable end of the link 20, and A support rod 38 is installed between the extended ends of the. Then, attach the link 20 in the extension direction. The urging means 40 for urging is composed of the support rod 38 at the movable end of the link and the locking piece of the weight adjusting mechanism 14. It is provided between 42 and.

[0024]   As the urging means 40, for example, a pair of tension coil springs arranged apart from each other on the left and right sides. Ne is available.

[0025]   As can be seen from FIG. 1 and FIG. 3, the weight adjusting mechanism 14 is provided with, for example, a lead screw. Liu 16 and a nut 44 with which the lead screw is screwed together A piece 42 is operably connected to the nut.

[0026]   The lead screw 16 may be, for example, a front bracket that is spaced apart in the front-rear direction. Installed between the racket 46 and the bearing 48 at the rear, rotatably supported and immovably mounted in the axial direction. Has been. The nut 44 is formed, for example, with the extension pin 50 at the upper end. The lead screw 16 is screwed between the bracket 46 and the bearing 48.

[0027]   In addition, for example, a guide hole 52 that allows the extension pin 50 of the nut to slide is provided at one end. The other end of the swinging arm 54 is pivotally attached to a bracket 56 of the upper frame by a pivot pin 58, The locking piece 42 is connected to the swing arm via a rotatable connecting link 60.

[0028]   In such a configuration, as the lead screw 16 rotates, Swinging of the nut 44 in the axial direction (forward movement) and screwing back (backward movement) causes swinging movement. The arm 54 is swung around the pivot pin 58, and the swing angle of the swing arm changes. As the locking piece 42 moves back and forth, the movable end 20b of the link moves in the front-back direction with respect to the base end 20a. Be moved to.

[0029]   In other words, due to the forward / backward movement of the locking piece 42 accompanying the rotation operation of the operation handle 14, The front and rear position of the movable end 20b of the link is adjusted. And before and after the movable end 20b of the link Due to the movement, the upper frame 22 is moved up and down, and the upper and lower frames 22 of the seated person who change up and down according to the increase or decrease of the weight. The height of the fulcrum (eye point) can be set to be almost constant.

[0030]   By the way, in the seat suspension device 18 having such a weight adjusting mechanism 14, Normally, after the assembly process of the weight adjustment mechanism and the link 20, the tension coil spring is (Biasing means) 40 is provided between the support rod 38 at the link movable end and the locking piece 42 of the weight adjusting mechanism. Erected.

[0031]   Therefore, in such a weight adjusting mechanism 14, the work of mounting the tension coil spring 40 In order to facilitate the operation, the lead screw 16 should be In addition to the weight adjustment stroke L1 in which the nut 44 moves, the mounting stroke L2 Is installed at the rear, and the sum of the stroke L1 and L2 total distance and nut width is used to move the nut. It is formed as a range L3.

[0032]   Then, as shown in FIGS. 1 and 2, the handlebar handle of the weight adjusting mechanism according to the present invention. The topper 10 has a length equivalent to the mounting stroke L2 and is compatible with the lead screw 16. It is formed so that it can be attached at any position.

[0033]   As can be seen in FIG. 2, the handle stopper 10 is made of, for example, plastic. Molded from an elastic material such as rubber or the like into a substantially C-shaped cross section that can be fitted into the lead screw 16. Has been. Further, the handle stopper 10 has, for example, a pair of guide pieces 62 at the opening end. Is formed.

[0034]   At such a position that the handle stopper 10 corresponds to the mounting stroke L2, The nut 44 moves with respect to the lead screw once it is fitted to the lead screw 16. The range of movement of the nut is blocked by the handle stopper, and the weight adjustment stroke L1 Limited to within. Then, as the operation handle 14 is rotated, the nut 44 is lifted. When it makes contact with the dollar stopper 10, rotation of the operating handle is blocked at the contact position. Be done.

[0035]   That is, by fitting the handle stopper 10 to the lead screw 16, The range of movement of 44 is limited to within the weight adjustment stroke L1 It is possible to reliably prevent excessive movement of the nut, that is, excessive rotation of the operating handle. Wear.

[0036]   Therefore, the distance between the support rod 38 at the movable end of the link and the locking piece 42 of the weight adjusting mechanism is small. , The distance from the tension coil spring 40 can be maintained without impairing the suspension force, Of suspension force and tension when using the suspension device 18 It is possible to reliably prevent the coil spring from coming off.

[0037]   And, without losing the mounting stroke L2, excessive rotation of the operating handle 14 Since operation can be reliably prevented, workability during installation work of the tension coil spring 40 is improved. It does not decrease.

[0038]   Further, the handle stopper 10 has a substantially C-shaped cross section having a guide piece 62 at the opening end, Since it is molded from an elastic material, it can be easily fitted to the lead screw 16. That Therefore, the work of attaching the handle stopper 10 can be easily performed, and the workability is deteriorated. Nor.

[0039]   Here, in the embodiment, the handle stopper 10 made of plastic or the like is used. However, if it can be molded as an elastic body that can be fitted to the lead screw, Not limited to sufficient material, plastic, etc. The dollar stopper may be molded.

[0040]   The handle stopper 10 is formed, for example, in a substantially C-shaped cross section, Although it is embodied as a structure that can be fitted on the clew 16, it is possible to install a tension coil spring. It suffices if it can be attached after the kick, that is, after the weight adjusting mechanism 12 is assembled. That Therefore, the present invention is not limited to this. For example, winding around the lead screw 16 or screwing Form the handle stopper 10 so as to regulate the movement of the nut 44 by Good.

[0041]   However, as in the embodiment, the handle stopper 10 is attached to the lead screw 16. With the structure that can be fitted, the work of attaching the handle stopper does not become complicated.

[0042]   The handle stopper of the weight adjustment mechanism of this invention is the lead screw and the Since any weight adjustment mechanism configured with a Is not limited to the illustrated configuration.

[0043]   The embodiment described above is for explaining the present invention, and the present invention is not limited to this. It is not fixed, and all things that have been deformed or modified within the technical scope of this invention Needless to say, it is included in this invention.

[0044]

[Effect of device]

  As described above, according to the handle stopper of the weight adjusting mechanism according to the present invention, the handle stopper is simple. Despite the simple structure, mounting on the lead screw after the attaching process of the biasing means By attaching it, it is possible to reliably prevent excessive rotation of the operation handle.

[0045]   Therefore, the distance between the movable end of the link and the locking piece should be adjusted so that Can be maintained at a distance that does not impair the operating force, and It is possible to reliably prevent the suspension force from decreasing and the biasing means from coming off.

[0046]   And, without losing the mounting stroke, excessive rotation of the operating handle Can be reliably prevented, so that workability during attachment work of the biasing means is not deteriorated. .

[0047]   In addition, the handle stopper has a substantially C-shaped cross section that can be fitted to the lead screw. If it is molded from a flexible material, the work of attaching the handle stopper can be done easily and the workability is low. Don't invite the bottom.

[Brief description of drawings]

FIG. 1 is a partially enlarged side view of a weight adjusting mechanism to which a handle stopper according to the present invention is attached.

FIG. 2 is a schematic perspective view of a handle stopper before being attached to a lead screw.

FIG. 3 is a schematic perspective view of a weight adjusting mechanism to which a handle stopper is attached and a seat suspension device.

[Explanation of symbols]

10 Weight adjustment mechanism handle stopper 12 Operation handle 14 Weight adjustment mechanism 16 lead screw 18 seat suspension system 20 links 20a Link end 20b movable end of link 40 Biasing means (tensile coil spring) 42 Locking piece 44 nuts

Claims (2)

[Scope of utility model registration request] 1. A lead screw with an operating handle;
A handle stopper attachable to a weight adjusting mechanism of a seat suspension device, comprising a nut provided so as to be interlocked with a movable end of a link of the seat suspension device via a biasing means, and a nut for a predetermined lead screw. The length of the moving range is equivalent to the mounting stroke for mounting the biasing means, and is formed so that it can be mounted on the lead screw after the mounting process of the biasing means. A handle stopper for the weight adjustment mechanism that blocks the movement of the nut and limits the rotation operation range of the operation handle. 2. A cross section of approximately C which can be fitted to a lead screw.
The handle stopper of the weight adjusting mechanism according to claim 1, wherein the handle stopper is formed of an elastic material.