KR101793446B1 - Pumping device of seat for vehicle - Google Patents

Abstract

A clutch unit for transmitting a rotational force input from the handle lever to the link means; A brake unit for interrupting a rotational force reversely inputted from the link means to the clutch unit; A front housing fixed to one side of the seat and having a space therein for accommodating the clutch portion and the brake portion; A lever bracket disposed outside the front housing, the lever bracket connecting the handle lever and the clutch portion; And a rear cover coupled to a rear surface of the front housing and fixed to a side surface of the seat together with the front housing. The brake unit includes a brake shaft connected to the link unit, And a guide plate having a brake drum to be transmitted to the brake shaft, a locking pin to be seated on the brake drum, and a guide hole extending through the locking pin and receiving a rotational force from the clutch to adjust a position of the locking pin And the clutch unit includes a clutch drum that rotates the brake drum and the guide plate by a rotational force inputted from the handle lever, and the locking pin is movable to the first position and the second position by rotation of the guide plate .
The pumping device for a vehicle seat according to the present invention has the effect of preventing a decrease in operating efficiency and providing reliable operating performance by originally blocking the phenomenon of reverse input of torque from the link means to the brake portion.

Description

Technical Field [0001] The present invention relates to a seat pumping device for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat pumping device, and more particularly, to a pumping device for operating a separate link mechanism installed in a seat with an operation force provided by a user to adjust a height of a seat and maintain a regulated height .

Generally, a driver's seat, an assistant seat and a seat for a passenger seat, which are installed in front and rear of a vehicle interior, are equipped with various convenience devices for the comfort of the passengers.

As the above-mentioned convenience device, there is provided a sliding function that can be adjusted by pushing and pulling back and forth according to the body shape of the passenger, and a reclining function for adjusting the inclination of the seat with respect to the backrest.

In addition, there is also provided a pumping device which is capable of raising and lowering the seat so as to adjust the height of the seat to the passenger, as shown in Fig.

The pumping device includes a lever unit, a clutch unit, and a brake unit. The lever unit receives a user's operating force and transmits the input to the clutch unit. And transmits the input operation force of the user to the link means of the seat. The brake unit acts to block the reverse input torque to fix the operated link means.

The brake unit generally prevents the reverse input torque from being transmitted through the wedge or frictional engagement between the brake unit and a fixing member such as a housing that houses the brake unit and the clutch unit with respect to the torque input from the link means.

However, in spite of the wedge engagement or the frictional engagement as described above, the wedge engagement force or the frictional engagement force is repeatedly lowered by the load and vibration applied to the seat, and thereby the power from the brake unit to the clutch unit is reversed As shown in FIG.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a pumping device for a seat which can prevent a reduction in operating efficiency and can reliably operate by blocking the phenomenon that the torque is reversely input to the brake portion from the link means The purpose is to provide.

In order to solve the above problems, a pumping device for a vehicle seat according to the present invention comprises: a clutch part for transmitting a rotational force input from a handle lever to a link means; A brake unit for interrupting a rotational force reversely inputted from the link means to the clutch unit; A front housing fixed to one side of the seat and having a space therein for accommodating the clutch portion and the brake portion; A lever bracket disposed outside the front housing, the lever bracket connecting the handle lever and the clutch portion; And a rear cover coupled to a rear surface of the front housing and fixed to a side surface of the seat together with the front housing. The brake unit includes a brake shaft connected to the link unit, And a guide plate having a brake drum to be transmitted to the brake shaft, a locking pin to be seated on the brake drum, and a guide hole extending through the locking pin and receiving a rotational force from the clutch to adjust a position of the locking pin And the clutch unit includes a clutch drum that rotates the brake drum and the guide plate by a rotational force inputted from the handle lever, and the locking pin is movable to the first position and the second position by rotation of the guide plate Do.

The rear cover may have a locking hole through which the locking pin can pass,

One end of the locking pin overlaps with the brake drum in a direction perpendicular to the longitudinal direction of the locking pin at the first position and the other end overlaps with the locking hole so that rotation of the brake drum is restricted by the rear cover do.

The rear cover may have a locking hole through which the locking pin can pass,

One end of the locking pin overlaps with the brake drum in a direction perpendicular to the longitudinal direction of the locking pin of the locking pin at the second position and the other end of the locking pin is not overlapped with the locking hole, And is relatively rotatable with respect to the cover.

Wherein the brake drum has a seating groove on which the locking pin is seated,

The locking pin includes a first body portion inserted into the seating groove, a second body portion extending from the first body portion and moving inside the guide hole, a locking portion projecting from the second body portion toward the locking hole, And a pressing spring disposed between the first body part and the seating groove, wherein the pressing spring is disposed in the seating groove with a preload applied thereto.

In addition, the biasing spring is further compressed in the second position than the first position.

Further, the guide hole has an arc shape, and a direction in which the guide hole passes through the guide plate at both ends of the arc is different from a direction in which the locking pin moves from the first position to the second position.

In addition, a curved surface having a predetermined curvature is formed in the end surface of the second body portion of the locking pin in the longitudinal direction of the locking pin.

In addition, when the guide plate is rotated by receiving the rotational force from the clutch unit, the curved surface of the second body part is in contact with both end faces of the guide hole, so that the locking pin is rotated in the direction perpendicular to the rotational direction of the guide plate. And is moved from the first position to the second position.

The pumping device for a vehicle seat according to the present invention has the effect of preventing a decrease in operating efficiency and providing reliable operating performance by originally blocking the phenomenon of reverse input of torque from the link means to the brake portion.

1 is a view showing a vehicle seat having a height adjustment function.
2 is an exploded perspective view of a pumping device including a wedge-shaped brake portion.
3 is an exploded perspective view of a pumping device including a brake portion according to the present invention.
4 is a perspective view for explaining a clutch drum according to the present invention.
5 is a perspective view for explaining a brake drum according to the present invention.
6 is a perspective view for explaining a guide plate according to the present invention.
7 is a front view of the guide plate of Fig.
8 is a cross-sectional view of a locking pin according to the present invention.
9 is a front view of a rear cover according to the present invention.
10 is an assembled perspective view and a side view of a pumping device according to the present invention.
Fig. 11 is a cross-sectional view of the pumping device of Fig. 10 cut in the BB direction, and is a view for explaining a state in which the brake is locked. Fig.
FIG. 12 is a cross-sectional view of the pumping device of FIG. 10 cut in the BB direction, and is a view for explaining a state in which the brake portion is unlocked.

Hereinafter, a pumping device for a vehicle seat according to the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, the terms first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms are only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The term " and / or " may include any combination of a plurality of related listed items or any of a plurality of related listed items.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between Can be understood. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used interchangeably to designate one or more of the features, numbers, steps, operations, elements, components, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are, unless expressly defined in the present application, interpreted in an ideal or overly formal sense .

In addition, the following embodiments are provided to explain more fully to the average person skilled in the art. The shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Figure 2 shows a pumping device including a wedge-shaped brake portion.

Referring to FIG. 2, a clutch unit 230 for transmitting the rotational force input from the handle lever 100 shown in FIG. 1 to the link means, a brake unit for interrupting the power input from the link means to the clutch unit A front housing 220 fixed to one side of the seat and having a space for receiving the clutch unit 230 and the brake unit 240 therein, A lever bracket 210 connecting the handle lever 100 and the clutch unit 230 and a rear cover 250 coupled to a rear surface of the front housing and fixed to one side of the seat together with the front housing, .

The front housing 220 includes a cylindrical body 221 and a side flange 223 which are coupled to the rear cover 250 to form an internal space. The body portion 221 is provided with a shaft hole 222, And a guide slot 225. The side flange 223 has a fastening hole 224 formed therein.

That is, the front housing 220 has a shaft hole 222 at a front center position, a side flange 223 is formed on both sides, a plurality of fastening holes 224 are formed on the side flange 223, And a guide slot 225, which is generally concentric with the shaft hole 222, is formed on the front surface.

Here, the guide slot 225 is a stop slot of the lever bracket 210 that converts the up / down operation of the handle lever 100 into a rotary motion to transfer the operation force to the clutch shaft 231, The rotation angle of the stop leg connected to the handle lever 100 by the guide slot 225 is limited.

The rear cover 250 is coupled to an open rear surface of the front housing 220. A shaft hole 251 is formed at a front center position and side flanges 252 are formed on both sides of the rear cover 250, A plurality of fastening pins 253 inserted into the fastening holes 224 of the front housing 220 are formed.

The front housing 220 and the rear cover 250 are formed with through holes on the side flanges 223 and 252, respectively, so that the front housing 220 and the rear cover 250 are fastened together by fastening means through the fastening holes.

The front housing 220 and the rear cover 250 may be formed by drilling the shaft holes 222 and 251 to substantially coincide with the center axis AA of the pumping device 200 so that the clutch portion 230 and the brake portion 240 Is aligned with the central axis AA.

Meanwhile, the clutch unit 230 has the following structure.

The clutch unit 230 includes a clutch shaft 231 that is inserted into the front housing 220 and has one end fixedly connected to the lever bracket 210 and a plurality of clutches 231 that are disposed at a predetermined interval along the outer circumferential surface of the clutch shaft 231 And a clutch drum 232 that rotates in conjunction with the rotation of the clutch shaft 231 through frictional contact with the connector 233.

The lever bracket 210 is connected to a handle lever 100 whose front surface is connected to adjust the height of the seat 300. A shaft hole for coupling to the clutch shaft 231 is formed at the center of the lever bracket 210, A stop leg (not shown) passing through the guide slot 225 of the front housing 220 is formed.

The front end of the clutch shaft 231 penetrates the shaft hole 222 of the front housing 220 and is inserted and fixed in the shaft hole 212 of the lever bracket 210. The rear end of the clutch shaft 231 is positioned in the inner space of the front housing 220 And an insertion hole into which a tip end of a later-described brake shaft 242 is inserted is formed in the center portion. At this time, a large number of concave curved or planar cam surfaces are radially formed on the outer peripheral surface of the rear end of the clutch shaft 231. Preferably, the cam surfaces are formed on the outer circumferential surface of the clutch shaft 231 at regular intervals.

In addition, the cam followers 233 are disposed on the respective cam surfaces, and each cam surface and the constituent elements 233 are preferably arranged to correspond to each other on a one-to-one basis. The coupling member 233 is restrained between the cam surface and the pressing surface 232a of the clutch drum 232 so that it can move along with the cam surface during rotation of the clutch shaft 231. [ Such a connector 233 may be formed in the form of a ball or a roller, or any other shape.

Meanwhile, a clutch spring (not shown) may be provided to provide an elastic restoring force for returning the connector 233 to the initial position. When the user rotates the lever bracket 210 using the handle lever 100, the connector 233 is rotated in the same direction, and the clutch spring is compressed in the rotating direction. Thereafter, when the rotational force applied to the lever bracket 210 is released, the connector 233 and the clutch shaft 231 are returned to their initial positions by the resilient restoring force of the compressed clutch spring 220.

A rear end of the clutch shaft 231 on which the cam surface is formed is located at the center of the clutch drum 232 and a pressing surface 232a is formed on the inner peripheral surface of the center of the clutch drum 232, do. A coupling member 233 is inserted between each of the cam surfaces formed on the outer circumferential surface of the clutch shaft 231 and the pressing surface 232a of the clutch drum 232. The coupling member 233 is engaged with the clutch shaft 231 And the pressing surface 232a of the clutch drum 232, respectively.

The engaging member 233 is brought into frictional contact with the cam surface of the clutch shaft 231 and the pressing surface 232a of the clutch drum 232 in the rotation process of the clutch shaft 231, So that the rotational torque of the clutch drum 232 can be transmitted to the clutch drum 232 through the engagement member 233. [

A plurality of protruding legs 262b extending in the direction of the center axis AA are formed on the outer circumferential surface of the clutch drum 232. The protruding legs 262b are formed on the brake drum 241, the rotational force of the clutch drum 232 can be transmitted to the brake drum 241. [0145]

Next, the configuration of the brake unit 240 will be described. The brake unit 240 includes a brake drum 241 having a wedge boss 241a protruding from the outer circumference of the brake drum 241 and a shaft hole 251 of the rear cover 250 coupled to the brake drum 241, A brake shaft 242 having an output gear 242a that is engaged with a link side sector gear and a brake roller 242 which is located on the side of the brake drum 241 and generates a braking force by a frictional force with respect to the front housing 220. [ (243).

The brake drum 241 is formed with a spline boss at a central portion for spline engagement with the brake shaft 242. The brake shaft 242 is formed with a key groove 242b engaging with the boss, And the brake shaft 242 may have an integral structure by forced indentation. The brake shaft 242 is formed with an extension shaft 242c which passes through the central through hole 241d of the brake drum 241 and is inserted into the insertion hole of the clutch shaft 231. [

A plurality of wedge bosses 241a are formed on the outer circumferential surface of the brake drum 241 at predetermined intervals in the radial direction and the protruding legs 232b of the clutch drum 232 are inserted between the wedge bosses 241a do.

A roller position surface 241b through which the first and second roller shafts 243a and 243b of the roller member 243 are inserted is formed on the outer peripheral surface of the brake drum 241 with each wedge boss 241a interposed therebetween . And between the roller position surface 241b and the restricting section surface 241c protruding from the outer circumferential surface of the brake drum 241. [ The restricting section surface 241c reduces the interval between the front housing 220 and the brake drum 241 and realizes a wedge action with respect to the roller member 243 so that the brake drum 241 is restrained with a strong braking force, The rotation of the shaft 242 can be prevented.

The brake shaft 242 meshes with the link side sector gear to raise or lower the link side when the brake force is released, and acts to restrain the link side motion when the brake force is generated.

The roller member 243 is disposed between the first and second roller shafts 243a and 243b and the first roller shaft 243a and the second roller shaft 243b located between the first and second roller shafts 243a and 243b, And an insert spring 243c for pushing the shaft 243b, respectively. The insert spring 243c has a structure that wraps the wedge boss 241a of the brake drum 241 and pushes the first and second roller shafts 243a and 243b positioned on both sides of the wedge boss 241a. .

As shown in the drawing, the first and second roller shafts 243a and 243b, which are assembled to the roller position surface 241b of the wedge boss side of the brake drum 241 and receive a pushing force from the insert spring 243c, The rotation of the brake drum 241 can be restrained by restricting the movement through the restricting section surface 241c protruding while continuing the surface 241b.

However, as described above, the system including such a wedge-type brake unit 240 repeatedly and periodically lowers the wedge engaging force or frictional engagement force due to the load and vibration applied to the seat and the like, A phenomenon occurs in which the power is transmitted from the brake portion to the clutch portion in the reverse direction.

3 is an exploded perspective view of a pumping device including a brake portion according to the present invention.

3, a pumping device 300 for a vehicle seat according to the present invention includes a clutch unit for transmitting a rotational force input from a handle lever to a link means, A front housing (320) fixed to one side of the seat and having a space for receiving the clutch and the brake unit therein, and a front housing (320) disposed outside the front housing (320) And a rear cover 350 coupled to a rear surface of the front housing 320 and fixed to one side of the seat together with the front housing.

The brake unit includes a brake shaft 342 connected to the link unit, a brake drum 341 transmitting the rotational force transmitted from the clutch unit to the brake shaft 342, And a guide hole (345b in Figs. 6 and 7) extending through the pin 344 and the locking pin 344 and receiving a rotational force from the clutch portion to adjust the position of the locking pin 344 Plate 345 as shown in FIG.

The clutch unit includes a clutch drum 331 that rotates the brake drum 341 and the guide plate 345 with a rotational force inputted from the handle lever and the locking pin 344 is engaged with the guide plate 345 To the first position and the second position. The first position corresponds to the position where the brake drum 341 is locked to the rear cover 350 by the locking pin 344 and the second position corresponds to the position where the brake drum 341 is locked to the rear cover 350 by the locking pin 344. [ Corresponds to a state in which the locking state of the lock lever 341 is released.

The present invention can prevent the torque from being reversely input to the brake unit from the above-described structure through the above-described structure, particularly the structure including the locking pin 344 and the guide plate 345. [

That is, the locking pin 344 forcibly locks the brake drum 341 and the rear cover 350, and the guide plate 345 receives the rotational force from the clutch drum 331, And moves the pin 344 from the first position in the locked state to the second position in the unlocking state.

3, the brake drum 341 and the roller member 343 are illustrated as being capable of further implementing the wedge-type breaking function, but a configuration other than the wedge type breaking function can be included in the present invention .

On the other hand, in Fig. 3, the clutch shaft 231 and the joining member 233 are omitted in the configuration overlapping with the pumping device 200 of Fig.

The individual components of the pumping device 300 according to the present invention will be described below with reference to FIGS.

4 shows a clutch drum 331 according to the present invention.

4, the clutch drum 331 according to the present invention is formed with a pressing surface 331a which is frictionally contacted to a contractor (not shown) on the inner circumferential surface of the clutch drum 232 in the same manner as the clutch drum 232 of FIG. 2, A protruding leg (not shown) extending between the wedge bosses 341a of the brake drum 341 shown in FIG. 5 and connected to the connecting leg 345c of the guide plate 345 to transmit rotational force to the guide plate 345 331b. 4, a total of four pairs of protruding legs, each having a pair of protruding legs 331b, are shown, but the present invention is not limited thereto. The rotational force input from the lever bracket 310 may be transmitted to the brake drum 341 and the guide plate 341, (345).

5, a brake drum 341 according to the present invention is shown

5, the wedge boss 341a, the roller position surface 341b, and the restraint surface 341c may be constructed as a structure capable of implementing the wedge type breaking function of Fig. 2, There is provided a seating groove 341e on which the above-described locking pin 344 is seated. The seating groove 341e serves to seat the locking pin 344 and to keep the moving direction of the locking pin 344 constant. That is, the seating groove 341e serves to guide the locking pin 344 to be moved between the first position and the second position in a direction substantially parallel to the central axis A-A shown in FIG. 5, a total of four seating grooves 341e are formed. However, the present invention is not limited thereto, and the number of seating grooves 341e may be adjusted according to the number of the locking pins 344. FIG.

The configuration of the locking pin 344 will be described later with reference to Fig.

6 and 7 show a guide plate 345 according to the present invention.

6 and 7, the guide plate 345 according to the present invention includes a disk-shaped body portion 345a having a through hole 345d through which the brake shaft 342 passes, a through hole 345d And a connecting leg 345c which is connected to the protruding leg 331b of the clutch drum 331 and receives a rotational force from the clutch drum 331. The guide leg 345b has a circular arc shape whose center coincides with the center of the clutch drum 331 do.

The direction in which the guide hole 345b passes through the guide plate at both ends of the arc is set to be different from the direction in which the locking pin 344 moves from the first position to the second position. 7, both ends of the arc-shaped guide hole 345b according to the present invention are formed as inclined surfaces 345b-1 having a certain angle with respect to the central axis A-A of FIG.

The inclined surface 345b-1 is in contact with the second body portion 344b of the locking pin 344 when the guide plate 345 receives the rotational force from the clutch drum 331 as described later And moves the locking pin 344 from the first position to the second position in a direction perpendicular to the rotation direction of the guide plate 345. [ That is, the rotational motion of the guide plate 345 is converted into a linear reciprocating motion of the locking pin 344 by the inclined surface 345b-1.

The number of the guide legs 345b can be adjusted in accordance with the number of the locking pins 344 and the number of the connecting legs 345c can be adjusted by the number of the pairs of protruding legs 331b of the corresponding clutch drum 331 .

8 is a cross-sectional view of a locking pin 344 according to the present invention.

8, the locking pin 344 according to the present invention includes a first body portion 344a to be inserted into the seating groove 341e of the brake drum 341, a second body portion 344b to be inserted into the first body portion 344a, A second body portion 344b extended from the second body portion 344b to move inside the guide hole 345b of the guide plate 345 and a locking hole 354 of the rear cover 350 described later And a pressing spring 344d disposed between the first body portion 344a and the seating groove 341e. The pressing spring 344d is pressurized by the pressing spring 344d, And is disposed in the seating groove.

The first body portion 344a has an outer shape that coincides with the shape of the seating groove 341e of the brake drum 341 described above. That is, the first body portion 344a is moved by the seating groove 341e of the brake drum 341 in a direction substantially parallel to the central axis AA shown in FIG. 2, 2 position.

The second body portion 344b cooperates with the inclined surface 345b-1 of the guide plate 345 so that when the guide plate 345 is rotated, . In order to facilitate such motion conversion, a portion of the second body 344b, which is in contact with the inclined surface 345b-1, is formed so as to have a curved surface having a predetermined curvature in a section cut in the longitudinal direction of the locking pin 344 do.

The interaction between the second body portion 344b of the locking pin 344 and the inclined surface 345b-1 of the guide plate 345 will be described later with reference to Figs. 11 and 12. Fig.

The locking portion 344c protrudes from the second body portion 344b toward the locking hole 354 of the rear cover 350 so that the locking pin 344 contacts the locking pin 344 in the first position, And the rotation of the brake drum 341 may be limited by the rear cover 350. The locking pin 344 may be formed of a synthetic resin, There is no portion overlapping with the locking hole 354 in the second position, that is, in the direction perpendicular to the longitudinal direction of the locking pin 344 in the unlocking state, so that the brake drum 341 is positioned on the rear cover 350 ) Relative to each other.

The pressing spring 344d may be a coiled compression spring and is disposed between the first body portion 344a and the seating groove 341e to guide the locking pin 344 to the guide plate 345. [ And the rear cover 350, respectively. The pressing spring is further compressed in the second position in the unlocking state than the first position in the locked state.

Meanwhile, the pressing spring 344d is disposed between the first body portion 344a and the seating groove 341e with a preload applied thereto. 8, the first body portion 344a is provided with a predetermined depression (a portion indicated by a dotted line) for receiving the pressing spring 344d. However, the present invention is not limited thereto, 344d may be applicable.

9 shows a rear cover 350 according to the present invention.

Referring to FIG. 9, the rear cover 350 according to the present invention further includes a plurality of locking holes 351 through which the locking portions 344c of the locking pins 344 can pass.

The illustrated locking hole 351 is disposed at a position corresponding to the position of the locking portion 344c of the locking pin 344. The locking holes 351 are formed in the shaft hole 351 at regular intervals, As shown in Fig.

Otherwise, other configurations may include all the configurations of the rear cover 250 shown in FIG. That is, the description of the shaft hole 351, the side flange 352, and the fastening pin 353 can be applied in the same manner as that of the rear cover 250 of FIG. Duplicate content should be omitted.

10 is an exploded perspective view and a side view of the pumping device 300 according to the present invention, and FIG. 11 is a cross-sectional view taken along the BB direction of the pumping device 300 of FIG. 10, .

And the direction B-B corresponds to a direction passing through the center axis of the locking pin 344. [

11 shows a state in which the brake drum 341 is locked to the rear cover 350 by the locking pin 344 according to the present invention, that is, the first position of the locking pin 344 is present. The locking portion 344c of the locking pin 344 overlaps with the locking hole 354 of the rear cover 350 in a direction perpendicular to the longitudinal direction of the locking pin 344. [

Therefore, even if the reverse input torque is transmitted to the brake drum from the link means of the seat and the reverse input torque is transmitted to the brake drum 341, that is, even if the brake drum 341 receives a rotational force in the direction of the arrow, The locking portion 344c of the brake drum 344 collides with the inner peripheral surface of the locking hole 354 and the rotation of the brake drum 341 is forcibly interrupted because the rear cover 350 is fixed to the seat.

With this configuration, the phenomenon that torque is reversely inputted from the link means to the brake portion can be originally blocked.

FIG. 12 is a cross-sectional view of the pumping device 300 of FIG. 10 taken along the line B-B, illustrating a state in which the brake unit is unlocked by the guide plate 345. FIG.

Referring to FIG. 12, when the rotational force is transmitted to the clutch unit through the lever bracket 310 through the handle lever, the guide plate 345 connected to the clutch unit receives a rotational force in a direction indicated by a solid line.

After the rotation of the guide plate 345 starts, the inclined surface 345b-1 of the guide hole 345b of the guide plate 345 is first contacted with the second body portion 344b of the locking pin 344 .

When the amount of rotation of the guide plate 345 is increased after the initial contact is started, a portion where the second body portion 344b comes into contact with the inclined face 345b-1 is a cross section cut in the longitudinal direction of the locking pin 344 The second body portion 344b of the locking pin 344 is urged in the direction indicated by the dotted line by the inclined surface 345b-1 of the guide hole 345b.

In other words, the rotation of the guide plate 345 is caused by the linear motion of the locking pin 344 due to the shape of the inclined surface 345b-1 of the guide hole 345b and the shape of the second body portion 344b of the locking pin 344 .

In this way, the locking pin 344 is finally moved to the second position, the locking portion 344c of the locking pin 344 is disengaged from the locking hole 354, and the locking state of the brake drum 341 is released.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

It should be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, And all changes or modifications derived from equivalents thereof should be construed as being included within the scope of the present invention.

Claims (8)

A clutch unit for transmitting a rotational force input from the handle lever to the link means;
A brake unit for interrupting a rotational force reversely inputted from the link means to the clutch unit;
A front housing fixed to one side of the seat and having a space therein for accommodating the clutch portion and the brake portion;
A lever bracket disposed outside the front housing, the lever bracket connecting the handle lever and the clutch portion; And
A rear cover coupled to a rear surface of the front housing and fixed to one side of the seat together with the front housing;
Lt; / RTI >
Wherein the brake portion includes a brake shaft connected to the link means, a brake drum transmitting rotational force transmitted from the clutch portion to the brake shaft, a locking pin seated on the brake drum, and a locking pin extending from the clutch portion And a guide plate having a guide hole for receiving a rotational force to adjust a position of the locking pin,
Wherein the clutch unit includes a clutch drum for rotating the brake drum and the guide plate by a rotational force inputted from the handle lever,
Wherein the locking pin is movable to a first position and a second position by rotation of the guide plate,
Wherein the rear cover has a locking hole through which the locking pin can pass,
Wherein the locking pin extends in the first position through the locking hole so that rotation of the brake drum is restricted by the locking pin and the rear cover,
And the locking pin is not extended through the locking hole at the second position so that the brake drum is rotatable relative to the rear cover. The method according to claim 1,
One end of the locking pin overlaps with the brake drum in a direction perpendicular to the longitudinal direction of the locking pin at the first position and the other end overlaps with the locking hole so that rotation of the brake drum is restricted by the rear cover Wherein the pumping device is a pumping device for a vehicle. The method according to claim 1,
One end of the locking pin overlaps with the brake drum in a direction perpendicular to the longitudinal direction of the locking pin of the locking pin at the second position and the other end of the locking pin is not overlapped with the locking hole, And is rotatable relatively with respect to the cover. The method according to claim 2 or 3,
Wherein the brake drum has a seating groove on which the locking pin is seated,
Wherein the locking pin has a first body part inserted into the seating groove,
A second body part extending from the first body part and moving inside the guide hole,
A locking portion protruding from the second body portion toward the locking hole, and a pressing spring disposed between the first body portion and the seating groove,
Wherein the pressure spring is disposed in the seating groove with a preload applied thereto. 5. The method of claim 4,
Wherein the pressure spring is further compressed in the second position than the first position. 5. The method of claim 4,
Wherein the guide hole has an arcuate shape and a direction in which the guide hole passes through the guide plate at both ends of the arc is different from a direction in which the locking pin moves from the first position to the second position. Lt; / RTI > The method according to claim 6,
Wherein a curved surface having a predetermined curvature is formed in the end surface of the second body portion of the locking pin in the longitudinal direction of the locking pin. 8. The method of claim 7,
The curved surface of the second body portion is brought into contact with both end surfaces of the guide hole when the guide plate is rotated by receiving the rotational force from the clutch portion so that the locking pin is rotated in the first direction To the second position. ≪ RTI ID = 0.0 > 11. < / RTI >

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