JPH10194028A - Indicator structure for seat suspension device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the constitution of an indicator and to improve a workability in its assembly. SOLUTION: The slider 108 of an indicator 104 is formed to be slidable by interlocking with the rotary operation of an operating handle owing to grasping afforded by an installing segment 122 by means of grasping segments 124 located on the bottom surface of the slider 108. The display board 106 of the indicator is formed by having a pair of projection 126, 127 on its bottom surface. A holding claw 114 for slidably holding the slider 108 based on the engagement and a locking claw 120 engageable with the peripheral edge of the installing window 118 of a garnish 116 are integrally provided to the projections of the display board, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to appropriately adjust and set the suspension force acting on a seat by varying the amount of extension of a buffer spring caused by the rotation of an operating handle, and to reduce the suspension force of the seat back. The present invention relates to an indicator structure of a seat suspension device that can be displayed outside via an indicator provided on a garnish.

[0002]

2. Description of the Related Art For example, a seat suspension device is mounted on a seat of a vehicle or the like to protect an occupant by attenuating vertical shocks, vibrations and the like transmitted to a vehicle floor or the like. Such a seat suspension device is configured such that, for example, the seat is supported on a predetermined base frame so as to be movable up and down, and shocks and vibrations in the vertical direction transmitted to the seat can be reduced by a shock absorber and a buffer spring. Have been.

[0003] As such a seat suspension device, for example, a configuration is known in which a shock absorber and a buffer spring are disposed at a back portion of a seat, that is, at a seat back portion. This type of seat suspension device is widely used for a seat of a construction machine such as a forklift, which often uses a space under the seat for another purpose, for example, a storage space for a battery and other mechanisms.

[0004]

By the way, as this type of seat suspension device, a so-called weight which can secure a buffering force (suspension force) according to the weight of the seated occupant by varying the amount of extension of a buffer spring. One having an adjusting mechanism is known.
And Japanese Patent Application Laid-Open Nos. 08-104161 and 02-234853. In such a configuration, a suspension force suitable for the weight of the occupant can usually be adjusted and set by rotating the operation handle (also simply referred to as a knob), whereby excessive sinking of the seat, or Since the insufficiency of the sinking can be prevented, the comfort and safety of the seated person can be sufficiently secured.

Here, as such a weight adjusting mechanism,
For example, there is known a configuration in which a set suspension force is displayed outside the seat, whereby the suspension force according to the weight of the occupant can be quickly and easily adjusted and set. As such an indicator for displaying the suspension force, for example, a configuration is provided which is incorporated in an operation handle so as to be able to display a set amount of the suspension force according to the rotation direction and the rotation amount of the operation handle.

[0006] However, such an indicator incorporated in the operation handle tends to be complicated in its configuration. In addition, due to an increase in the number of parts due to the complexity of the configuration, an increase in the price of the indicator part cannot be avoided.

An object of the present invention is to provide an indicator structure of a seat suspension device which simplifies the configuration of an indicator and improves workability at the time of assembling the indicator.

[0008]

According to the present invention, an indicator has a predetermined scale on a surface of a portion adjacent to a long side of a substantially elongated hole-shaped exposure window. The display panel is formed including a formed display panel, and a slider arranged on the rear side of the display panel and aligned with the exposure window so that a mark on the front surface can be exposed through the exposure window of the display panel.
In the slider of this indicator, a pair of holding pieces, which can hold a mounting piece having a substantially circular cross section that moves in conjunction with the rotation operation of the operation handle under insertion from the opening side, are integrated with the back surface. It is projected.

[0009] The display plate of this indicator is formed on its back surface with a pair of protrusions separated from each other in the short direction of the exposure window. And it can be locked to the holding claw that slidably holds the slider under the engagement and the periphery of the mounting window of the corresponding shape formed on the garnish with the display plate fitted from the outside And a locking claw are integrally provided on the projections of the display plate.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in a seat suspension device 10 provided with an indicator structure according to the present invention, a seat cushion 12 and a seat back 14 are provided.
The seat frame 16 holding the predetermined base frame
It is supported so that it can move up and down with respect to 18. Then, the vibration, impact, etc. of the seat frame 16 in the vertical direction with respect to the base frame 18 are applied under the combination of the shock absorber 20 and the buffer spring 22 disposed at the back portion of the seat frame, that is, the seat back portion. The seat suspension device 10 is configured to be relievable.

As can be seen from FIG. 3 in addition to FIG.
The base frame 18 includes, for example, a substantially U-shaped back frame 18b between rear ends of a pair of left and right base brackets 18a.
Is erected and fixed in its upright state, so that it is formed in a substantially side shape. In the base frame 18, for example, a rotatable link 24 is erected and pivoted between the left and right base brackets 18a, and a pair of left and right brackets 26 protrude outside the left and right ends of the back frame 18b. (See FIG. 1). And this link 24,
The seat frame 16 is supported on the base frame 18 via a bracket 26 so as to be able to move up and down.

As can be seen from FIGS. 2 and 3, the seat frame 16 includes, for example, a cushion portion 16a extending in the front-rear direction (left-right direction in the drawing) and a back portion extending in the vertical direction.
16b are integrally formed under the connection of the connection plate 28 to form a substantially rectangular shape on the side. And, a front-rear direction laid between predetermined facing ends of the seat frame 16,
Arrangement of the seat pad on the upper surface of the left and right support members 30, 31 or on the front surface of the left and right support members 32, 33, and integral covering of the seat pad and the seat frame with a trim cover made of a skin, etc. Thereby, the seat cushion 12 and the seat back 14 that can elastically support the occupant are formed.

As shown in FIGS. 1 and 3, the seat frame 16 includes a pair of left and right brackets 36 protruding inward facing the brackets 26 of the base frame. Is formed. The bracket 36 is formed, for example, with an elongated hole 38 extending in the vertical direction. The bracket 36 is connected to the bracket 26 by inserting a connecting pin 42 through the elongated hole and the round hole 40 of the bracket 26. , Seat frame 16 against base frame 18
Can be secured.

As shown in FIG. 2, for example, a pair of right and left holders 44 is provided at the front end of the cushion portion 16a of the seat frame, and the seat frame 16 is pivotally supported by the links 24 by the holders. It is supported so that it can move up and down freely.

[0016] The seat frame assembled as described above.
16. The base frame 18 includes, for example, a base bracket to an upper rail 50, a seat slide device 48 having a lower rail 46 fixed to a pedestal 45 of a vehicle such as a forklift.
18a is mounted and connected under fixed condition. That is, the seat formed by the combination of the seat cushion 12 and the seat back 14 is supported by the seat slide device 48 so as to be slidable in the front-rear direction.

Here, as shown in FIG. 1, in such a seat suspension device 10, a shock absorber 20 which functions to attenuate impacts, vibrations and the like in the axial direction is provided at the back portion of the seat, that is, at the back of the seat. For example, a mounting plate 52 that is disposed in the seat back portion and is fixed between the upper end of the back frame 18b of the base frame 18 and the left and right ends of the back portion 16b of the seat frame 16 below the upper portion.
It is erected between each end with a pivot at each end.

The buffer spring 22 is connected to the base frame 18.
It is arranged at the same back position as the shock absorber 20 so that an upward biasing force on the seat frame 16 can be applied to the seat frame 16. As shown in FIGS. 1 and 2, in the seat suspension device 10, the upper end of the buffer spring 22 is locked by a locking piece 54 at the upper end of the back frame 18 b of the base frame 18, and the lower end thereof is It is connected to a free end 56a of a pivot arm 56 pivotally connected to the seat frame 16 at a fulcrum.

As can be seen in FIG. 4 in addition to FIGS. 1 and 2, the pivot arm 56 has a pivot pin 58 at its free end 56a.
The lower end of the buffer spring 22 is connected to the free end of the rotating arm by the support plate 60 rotatably connected by the I have.

The pivot pin 58 is held undetachably by fitting, for example, a speed nut 64 to its extended end.

For example, as shown in FIG. 1, between the left and right sides of the left and right connecting plates 28 of the seat frame 16, support rods 66 are erected and fixed. Then, as can be clearly seen from FIG. 5 (A) in addition to FIG.
56 is provided with a stepped support pin 70 against a hollow bracket 68 having a substantially U-shaped cross section fixed to the support rod 66.
And are rotatably connected and supported via a. That is, the support pin 70 serves as a fulcrum of the turning arm 56, and the turning arm is turned around the fulcrum with respect to the bracket 68.

The support pin 70 is formed with a screw portion 70a at the tip, and is attached to the bracket 68 so as not to be detachable by screwing a nut 72 to the screw portion.

Here, as shown in FIGS. 4 and 5 (A), in this seat suspension device 10, the rotating arm
56 is formed with an elongated guide hole 74 at an extended end 56b located on the side opposite to the free end 56a with the fulcrum (support pin) 70 interposed therebetween. As can be seen from FIG. 5A, the guide hole 74 has a fulcrum 70 and a free end 56 formed by a pivot pin 58.
a, it is provided on a straight line 78 inclined by a predetermined angle with respect to a straight line 76 connecting a pivot point (support pin) between the support plates 60.

As shown in FIGS. 4 and 5A, a movable nut 82 integrally having a sliding pin 80 slidable inside the guide hole 74 is provided with a pair of hollow brackets 68 facing each other. A lead screw 86 that is disposed and supported linearly movable along a guide hole 84 provided in the wall and that can be screwed to the movable nut aligns its axis in the moving direction of the movable nut, for example, , Which are rotatable with respect to the connection plate 28 of the seat frame and are not detachable.

The movable nut 82 is formed integrally with, for example, a coaxial extending end 82a on the side opposite to the extending side of the sliding pin 80, and the sliding pin and the sliding pin are inserted into the guide hole 84 of the bracket. It is arranged movably along the guide hole by loose insertion of the extension end. The sliding pin 80 has, for example, a stepped shape having a threaded portion 80a at the tip, and by screwing a nut 88 onto the threaded portion, the sliding pin, that is, the movable nut 82, And the bracket 68 is slidably and undetachably mounted inside the guide holes 74 and 84, respectively.

The bracket 68 is formed to have a large-diameter insertion hole 90 connected to the guide hole 84. Through this insertion hole, the movable nut 82 is inserted and interposed between a pair of opposed walls of the bracket. It is possible.

The lead screw 86 is formed integrally with an operation handle 92 at one end thereof. The operation handle 92 is provided to protrude from a lower end of the seat back 14 (see FIGS. 1 and 2).

In such a configuration, the operation handle
Under the rotation operation of 92, the lead screw 86 rotates, and due to the screw advance and screw back with the rotation of this lead screw,
The movable nut 82 moves linearly along the guide hole 84 of the bracket. For example, assume that the state shown in FIG. 5A is an initial state of weight adjustment in the seat suspension device 10. In this state, the movable nut 82 and the sliding pin 80 are located to the left of the guide hole 84 of the bracket and the guide hole 74 of the rotating arm in the drawing.

From such an initial state, the operation handle 92
When the lead screw 86 is rotated in the corresponding direction under the above rotation operation, the movable nut 82 moves to the right along the guide hole 84 of the bracket under the lead screw, for example, by screwing. Here, in the seat suspension device 10, the guide hole 74 of the pivot arm is provided on a straight line 78 inclined by a predetermined angle from a straight line 76 connecting the fulcrum 70 of the pivot arm and the pivot point 56 of the free end. Therefore, when the movable nut 82 moves rightward in the figure from the initial position shown in FIG. 5A, the sliding pin 80 slides in the guide hole of the rotating arm, and the rotating arm 56 is moved. It is rotated counterclockwise, and its free end 56a, that is, the support plate 60 is lowered, as shown in FIG.

As can be seen from FIG. 1 in addition to FIG. 6 (A), when the support plate 60 is lowered under the rotation of the rotation arm 56, the back frame 18b on which the buffer spring 22 is stretched is moved. Since the distance between the upper end and the support plate fluctuates in a direction to increase, the amount of extension of the buffer spring 22 at the lower position of the support plate decreases. That is, when the weight of the seated person is heavy, the support plate 60 is lowered in this way to
By reducing the amount of extension of 22, excessive sinking of the seat is suppressed, and a cushioning force (suspension force) suitable for a heavy occupant is ensured.

Conversely, when the weight of the occupant is light, the height of the support plate 60 is maintained at an upper position as shown in FIG.
Under the smooth sinking of the seat, a suspension force suitable for a lightweight occupant can be easily secured.

Here, the seat suspension device 10
Is configured so that the amount of extension of the buffer spring 22, which is adjusted and set under the rotation of the operation handle 92, that is, the suspension force, can be taken out of the seat.

As shown in FIGS. 4 and 5 (A), in this configuration, a link member, for example, a movable nut 82 which is movable under the rotation of the operation handle 92, is provided with a link arm.
One end of 94 is pivotally mounted, and the base end of a support arm 98 pivotally mounted on a bracket 96 of the seat frame 16.
At 98a, the other end of the link arm is pivotally connected by a pivot pin 100. One end of the link arm 94 is pivotally connected to the movable nut using, for example, a step portion 80b of a slide pin 80 provided integrally with the movable nut 82.

The support arm 98 has a pivot pin 102
Pivotally mounted to the bracket 96 by That is, the pivot pin 102 serves as a fulcrum of the support arm 98, and the support arm is rotated about this fulcrum.

In such a configuration, when the movable nut 82 moves along the axis of the lead screw 86, that is, along the guide hole 84, the link arm 94 swings with this movement, and the base end 98a of the support arm moves up and down. The support arm 98 moves in the direction shown in FIG.
Is moved in a direction opposite to the vertical position of the base end (FIG. 5).
(A) and FIG. 6 (A)).

That is, in this configuration, both the elevation of the support plate 60 and the vertical movement of the free end 98b of the support arm are obtained in conjunction with the movement of the movable nut 82 accompanying the rotation operation of the operation handle 92. A change in the amount of extension (suspension force) of the buffer spring 22 and the amount of change in the amount of change of the suspension spring 22 when the support plate is moved up and down can be taken out via the support arm 98.

Here, as shown in FIGS. 5A and 5B, in the present invention, the amount of extension of the buffer spring 22 taken out by the support arm 98, that is, the set amount of the suspension force changes the indicator 104. It can be displayed outside of the sheet via the.

FIGS. 7 and 8 (A) to 8 (A) to 8 (B) in addition to FIGS. 5 (A) and 5 (B).
As can be seen from (C), in the indicator structure of the present invention, the indicator 104 has, for example, a display plate 106 having a substantially elongated hole-shaped exposure window 110 and a surface of the display plate through the exposure window of the display plate. And a slider 108 arranged on the back side of the display panel so as to be able to expose the mark 108a in alignment with the exposure window. The display panel 106 has an exposure window 110
The surface of the portion adjacent to the long side is formed with a predetermined scale 105, and the direction of the scale of the operation handle is determined by the indication of the scale through the exposure window by the slider mark 108a.
The indicator 104 is configured to be able to display the suspension force according to the rotation amount.

As shown in FIG. 5B, in this embodiment, the scale 105 of the display panel exemplifies a numerical value representing the weight of the occupant. And here, the weight is displayed every 10 kg between 50 and 110 kg. Also, as shown in FIGS. 8A and 8B, the slider mark 108a
Are formed on the surface of the slider 108 in advance, for example, as linear concave portions.

Here, as shown in FIGS. 4 and 5A, in the present invention, the mounting piece 122 having a substantially circular cross section is
For example, the support arm 98 is bent and formed into a substantially L-shape, and is fixedly protruded from a free end 98b of a support arm 98 which is turned in conjunction with a rotation operation of the operation handle 92 by fixing one end thereof. As shown in FIGS. 5 (A), 7 and 8 (B), in the present invention, a pair of holding pieces which enable the holding piece 122 of the support arm to be held in the vertical direction in the drawing.
Reference numeral 124 protrudes integrally from the back surface of the slider 108 of the indicator.

As can be seen from FIG. 8B, the pair of holding pieces 124 have an opening on the opposite side (left side in the figure) to the slider 108. , And is configured to hold the mounting piece 122 of the support arm. That is, in this configuration, the support arm 98 and the slider 108 are operably connected by the holding of the mounting piece 122 by the pair of holding pieces 124, and the slider causes the support arm to rotate, Is vertically slidable with the free end 98b of the support arm under the movement of the movable nut 82 in conjunction with the rotation of the operation handle 92.

Since the mounting piece 122 moves up and down under the rotation of the support arm 98 about the fulcrum 102, the holding piece 124 of the slider moves along the circular movement locus of the mounting piece. The slider 108 is formed to have such a length that a deviation from the linear movement locus of the slider 108 with respect to the display plate 106 can be guaranteed.

As can be seen from FIGS. 7 and 8 (A) to 8 (C), in the indicator structure of the present invention, the display plate 10
A pair of protrusions 126, 127 separated from each other in the short direction of the exposure window 110 are provided on the back surface of the exposure window 110, for example, at two locations separated in the longitudinal direction of the exposure window. A holding claw that slidably holds the slider 108 under the engagement.
An engaging claw 120 engageable with a peripheral surface of a mounting window 118 of a garnish (resin plate) 116 that integrally covers the back and side surfaces of the seat back 14 are integrally formed with the projections 126 and 127, respectively. Is provided.

As shown in FIGS. 7, 8A and 8C, the holding claws
The projection 114 is provided so as to protrude from the opposing surfaces of the pair of projections 126 and 127 and is formed in a length and shape that allows the slider 108 to be fitted from the back side of the display panel 106. Also,
The locking claws 120 are, for example, projecting outward in the vertical direction in the figure so as to be engageable with the peripheral edge thereof while the display plate 106 is fitted to the mounting window 118 of the garnish.

The indicator 104 is assembled before fitting the garnish into the mounting window 118. The slider 108 is pushed into the holding claw 114 from the rear surface side of the display plate 106 to engage with the holding claw, and the
As shown in (B) and (C), for example, it is held slidably with respect to the display plate between the holding claw and the protrusion 112 provided on the periphery of the back surface of the exposure window 110.

Here, the slider 108 is, for example, exposed at any position within the sliding range of the display panel.
It is formed in a long shape having a length covering 110. Then, the length of the slider holding piece 124 that can be engaged with the holding claw is set so that the sliding range of the slider 108 with respect to the display plate 106 can be defined under the engagement with the holding claw 114. Is formed. That is, in this configuration, the holding claws 114 provided on the projections 126 and 127 also serve as stoppers that define the sliding range of the slider 108.

In such an indicator 104,
Since the overall length of the slider 108 in the longitudinal direction is longer than the display plate 106, for example, the mounting piece 122 of the support arm is set to the lowermost position as shown in FIG. After that, the slider is shifted to the corresponding position, that is, downward, and the display plate 106 is inserted into the garnish mounting window 118 from below together with the slider.

Then, the display panel 106 is mounted on the garnish mounting window 11 with the holding piece 124 aligned with the mounting piece 122.
8, the support arm 98 and the slider 108 are connected with the insertion of the mounting piece between the pair of holding pieces, and the locking claw 120 is engaged with the peripheral edge of the mounting window. Thus, the display plate, that is, the indicator 104 is attached to the garnish 116.

As described above, in the indicator structure of the seat suspension device of the present invention, the support arm 98 which can rotate in conjunction with the rotation of the operation handle 92 is provided.
The mounting piece 122 and the slider 106 are operably connected to each other, and the slider 104 is slid along with the rotation of the support arm so that the suspension force according to the rotation operation of the operation handle can be displayed on the indicator 104. Can be easily obtained.

The indicator 104 can be unitized in advance by assembling the slider 108 to the display panel 106, and the support arm 98 can be connected to the support arm 98 by inserting the mounting piece 122 between the pair of holding pieces 124. Since the slider and the slider can be operatively connected to each other, it is sufficient to mount the indicator 104 on the garnish mounting window 118 by fitting the indicator into the mounting window in a unitized state. Therefore, workability in mounting the indicator 104 is improved.

A holding claw 114 for slidably holding the slider 108 on the display plate 106 and a locking claw 120 for locking the display plate to the garnish 116 are provided with common projections 126 and 127 of the display plate. Since it is provided integrally, the shape of the display plate can be simplified.

Here, in the embodiment of the present invention, the slider 108 is embodied as a long shape that covers the exposure window 110 of the display panel at any sliding position. It is sufficient if it is slidable with respect to the plate and formed with a mark 108a indicating the scale of the display plate on the surface, and is not limited to this longitudinal shape. The slider may be formed in a suppressed side surface substantially T shape.

However, if the slider 108 is formed to have a long shape that covers the exposure window 110 of the display panel at any sliding position, the exposure of the inside through the exposure window is surely prevented, so that the sheet is prevented from being exposed. The appearance quality is improved.

In this embodiment, the exposure window
As a configuration provided at two locations separated from each other in the longitudinal direction of 110,
A pair of projections 126, 127 of the display panel are embodied. However, the projections 126 and 127 need only have the holding claw 114 and the locking claw 120 integrally, and the holding claw is
108 is slidably held, and it is sufficient if the pawl can be engaged with the peripheral surface of the garnish mounting window 118.
A configuration in which the projections are formed in a longitudinal shape extending along the longitudinal direction of the exposure window, and holding claws and locking claws are integrally provided on the corresponding surfaces, that is, a pair of projections are formed in the central portion of the rear surface of the display panel. It is good also as composition provided in three places.

However, the slider 108 is located at two places where the pair of projections 126, 127 are separated from each other in the longitudinal direction of the exposure window 110.
By providing the protrusion at the position corresponding to the slide range, the holding claw 114 of the projection can also be used as a stopper that defines the slide range of the slider. The shape can be further simplified.

In the embodiment of the present invention, the indicator for the garnish mounting window 118 in a state where the slider 108 is shifted to the lowermost position with respect to the display plate 106 is provided.
Although the attachment of the 104 is illustrated, the invention is not limited to this. That is, the mounting piece 122 of the support arm is
When set to the top position as shown in (A),
The slider 108 is set at a position above the display plate 106, and the indicator 104 is set to the garnish mounting window 118.
May be inserted from above.

Further, in this embodiment, the display of the weight of the indicator display plate 106 is exemplified as a display between 50 and 110 kg. However, the weight display may be a numerical value according to the adjustment of the amount of extension of the buffer spring 22 and the setting range, and it is needless to say that the weight display is not limited to the range of this embodiment. Further, the interval between the scales 105 is not limited to every 10 kg, but may be, for example, an interval of 5 kg, an interval of 20 kg, or the like.

In this embodiment, the scale 105 on the display plate of the indicator 104 is shown as an example of the weight display corresponding to the obtained suspension force.
This scale is sufficient as a guide for adjusting and setting the suspension force, so it is not limited to the display of weight.For example, the strength of the suspension force is expressed by a number from 1 to 10 or an appropriate alphabetical display. It may be configured.

Further, in this embodiment, the movable nut 82 is exemplified as the movable member to which the link arm 94 is connected. However, any movable member that moves under the rotation operation of the operation handle 92 is sufficient. Therefore, the present invention is not limited to the movable nut, but may be configured to pivotally connect one end of the link arm to another member, for example, the rotating arm 56 or the like. However, since the movable nut 82 moves clearly in the corresponding direction under the rotation operation of the operation handle 92, if one end of the link arm 94 is pivotally connected to this movable nut and connected, the buffer spring 22 The amount of extension and its variation can be clearly displayed.

As shown in FIG. 1, in this embodiment, the operation handle 92 and the indicator 104 are disposed on the right side when viewed from the front of the seat back 14, but on the contrary, The operation handle and the indicator may be arranged and exposed on the left side as viewed from the front of the seat back. In this case, the rotating arm 56, the bracket 68, the lead screw 86, the movable nut 82, and the like are arranged and configured symmetrically with respect to the drawing.

Further, in this embodiment, a seat suspension device is illustrated as a configuration in which an operation handle is disposed at a lower end of a seat back. However, the present invention can be applied to any seat suspension device that can adjust and set the amount of extension of the buffer spring by rotating the operation handle regardless of the position of the operation handle.

In the embodiment of the present invention,
Although the present invention is specifically described as a seat suspension device suitable for a seat of a construction machine such as a forklift, the invention is not limited to the construction machine, and may be applied to, for example, agricultural machines such as tractors and other vehicles. .

The embodiments of the present invention described above are for explaining the present invention, and do not limit the present invention in any way. Modifications, alterations, and the like made within the technical scope of the present invention are also possible. It goes without saying that all are included in the present invention.

[0064]

As described above, in the indicator structure of the seat suspension device according to the present invention, the movable member and the slider that are interlocked with the rotation operation of the operation handle are operatively connected to each other so that the movable member is moved. Since the suspension force corresponding to the rotation operation of the operation handle can be displayed on the indicator by sliding the slider, it is easy to simplify the configuration in displaying the suspension force.

The indicator can be unitized in advance under the condition that the slider is attached to the display plate.
Under the insertion of the mounting piece between the pair of holding pieces, the predetermined movable member and the slider can be connected in an interlockable manner, so that the indicator is attached to the mounting window of the garnish, and the indicator is unitized. It suffices to fit the mounting window in this state. Therefore, workability in mounting the indicator is improved.

In addition, the holding claw for slidably holding the slider on the display plate and the locking claw for locking the display plate to the garnish are integrally provided on the common projection of the display plate, so that the display is provided. The shape of the plate can be simplified.

If the slider has a long shape that covers the exposure window of the display panel at any sliding position, the inside of the sheet through the exposure window is reliably prevented, so that the appearance quality of the sheet is improved. Is improved.

Furthermore, if the holding claws of the projections provided at two places separated from each other in the longitudinal direction of the exposure window can be used as stoppers for defining the sliding range of the slider, the structure of the display plate can be simplified by simplifying the structure. Is further simplified.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a seat suspension device according to the present invention.

FIG. 2 is a schematic longitudinal sectional view of the seat suspension device.

FIG. 3 is an exploded perspective view of a seat frame and a base frame in the seat suspension device.

FIG. 4 is a partial schematic exploded perspective view of a seat suspension device mainly including a member interlocked with a rotation operation of an operation handle.

FIG. 5 is a partial front view of the seat suspension device and an operation diagram of an indicator in an initial state.

FIG. 6 is a partial front view of the seat suspension device and an operation diagram of an indicator during weight adjustment.

FIG. 7 is a schematic exploded perspective view of a display plate and a slider of the indicator as viewed from the back surface.

FIG. 8 is a rear view of the indicator in an assembled state of the display plate and the slider, and lines AA and B- in the rear view.
It is each sectional drawing along B.

[Explanation of symbols]

 10 Seat suspension device 14 Seat cushion 16 Seat frame 18 Base frame 22 Buffer spring 56 Rotating arm 60 Support plate 80 Sliding pin 82 Movable nut 86 Lead screw 92 Operating handle 94 Link arm 98 Support arm 98a Base end of support arm 98b Support Free end of arm 102 Pivot pin (fulcrum) 104 Indicator 106 Display panel 108 Slider 122 Mounting piece 124 Nipping piece 126, 127 Projection

Claims (3)

[Claims] 1. A suspension force acting on a seat can be appropriately adjusted and set by a variation in the amount of expansion of a buffer spring caused by a rotation operation of an operation handle, and the suspension force is indicated by an indicator provided on a garnish of a seat back. A display plate formed with a predetermined scale on the surface of a portion adjacent to the long side of the substantially elongated exposure window; The mark on the surface can be exposed through the exposure window of the board,
A slider arranged in alignment with the exposure window on the back side of the display panel; and a mounting piece having a substantially circular cross section that moves in conjunction with the rotation of the operation handle. A pair of holding pieces that can be held by insertion are integrally provided on the back surface of the slider, and the display plate has a pair of holding members separated on the back surface in the short direction of the exposure window. A holding claw formed to have a projection and slidably holding the slider under the engagement thereof; and fitting a display plate from the outside to a periphery of a correspondingly shaped mounting window formed in the garnish. Locking pawls engaged under clothing;
Are provided integrally with the projections, respectively. 2. The indicator structure for a seat suspension device according to claim 1, wherein the slider is formed in a longitudinal shape having a length that covers an exposure window of the display plate at any position within a sliding range with respect to the display plate. 3. A slider holding member is formed at a position substantially at the center in the longitudinal direction of the slider and having a length capable of engaging with the holding claw of the display plate in the short direction of the slider. 3. The sheet according to claim 2, wherein a pair of projections are provided at predetermined two locations separated from each other in the longitudinal direction of the exposure window, so that the holding claw of the display plate can also be used as a stopper for defining a sliding range of the slider. Indicator structure of suspension device.