Anti-eccentric device for a pumping device

Abstract

The present invention relates to an anti-eccentricity device for a pumping device, which reduces the free movement of the pumping rod while reducing the eccentric movement of the internal components due to external forces. An anti-eccentricity device for a pumping device is disclosed, which comprises a rod support coupled to the pumping rod, a housing in which a clutch device is disposed and coupled to a position facing the rod support by the clutch device, and an elastic member providing an elastic restoring force in the direction of counteracting the eccentric movement of the clutch device bending around the rotation axis, and elastically supported on the rod support.

Description

TECHNICAL FIELD

[0001] The present application relates to an anti-eccentric device for a pumping device that reduces eccentric movement of internal components due to external force while reducing free movement of a pumping lever. BACKGROUND

[0002] The pumping device refers to a device installed on a seat to manually adjust the height of a seat cushion to a height suitable for a person sitting on the seat.

[0003] When the person sitting on the seat manipulates the pumping lever installed on the side of the seat cushion clockwise or counterclockwise, the operation force of the pumping lever is transmitted to a link mechanism through the seat pumping device, and the seat cushion moves up or down according to the direction in which the pumping lever is manipulated, so that the height of the seat cushion is adjusted.

[0004] The configuration of the pumping device will be briefly described. The pumping device includes a lever bracket integrally coupled to a pumping lever and configured to rotate, a housing having a drum shape and installed in a seat cushion, a clutch device accommodated in the housing and configured to rotate by receiving a rotational force provided from the pumping lever from the lever bracket, a brake device configured to block a reverse input torque and maintain an adjusted height of the seat cushion, and a housing cover coupled to one side of the housing and configured to cover the housing.

[0005] In the case of the pumping device, the pumping lever and the lever bracket are integrally coupled. Therefore, when a force is applied to the pumping lever in a lateral direction, the lever bracket also rotates, which makes it difficult to maintain a gap formed between the lever bracket and the housing at a predetermined level.

[0006] That is, a large gap causes a problem of an increased amount of play of the pumping lever. In addition, a small gap causes a problem of friction occurring between components, an increase in operation force, or the occurrence of operation noise and abnormal noise, thereby causing a quality problem.

[0007] In addition, the rotational axes of the clutch device and the brake device, which rotate together with the lever bracket, are eccentrically arranged, which causes a problem in which components provided in the housing are caught by the inner wall surface of the housing and a gap occurs between the internal components.

[0008] As prior art, there is KR 10-1947534B.

[0009] The above-described background explanations are only intended to help understand the background of the present application, and are not intended to indicate that the present application falls within the scope of the prior art known to those skilled in the art. SUMMARY

[0010]

TECHNICAL PROBLEM

[0011] The present invention is made to solve the above problems, and an object of the present invention is to provide an anti-eccentricity device for a pumping device, which reduces the eccentric movement of internal components due to external forces while reducing the free movement of a pumping rod.

[0012]

Technical solution

[0013] To achieve the above-mentioned objectives, the present invention provides an anti-eccentricity device for a pumping device, which anti-eccentricity device includes: a rod bracket connected to a pumping rod; a housing having a clutch device arranged in the housing and connected to a position toward the rod bracket through the clutch device; and an elastic member elastically supported on the rod bracket while providing an elastic restoring force in a direction to offset the eccentric movement of the clutch device bending relative to the rotation axis.

[0014] A through hole may be formed in one surface of the housing facing the rod bracket, and the elastic member may be provided between the inner surface of the housing and the clutch device and supported on the rod bracket while passing through the through hole.

[0015] The elastic member may include a clutch support portion having a wave shape in a circumferential direction and disposed between an inner surface of the housing and the clutch device; and a bracket support portion protruding from the clutch support portion toward the lever bracket and configured to pass through the through hole.

[0016] One surface of the clutch support portion can be supported on the inner surface of a cylindrical drum portion arranged in the center of the housing, the other surface of the clutch support portion can be supported on the edge surface of a clutch drum arranged to surround the clutch device, the edge surface of the clutch drum can face the inner surface of the drum portion, one end of the bracket support portion can be fixed to one surface of the clutch support portion, and the other end of the bracket support portion can be supported on a rod bracket facing the housing.

[0017] One surface of the clutch support portion may contact the inner surface of the drum portion while being disposed on the same plane as the inner surface of the drum portion, and the other surface of the clutch support portion may contact the edge surface of the clutch drum while being disposed on the same plane as the edge surface of the clutch drum.

[0018] The convex portion of one surface of the clutch support portion may be in line contact with the inner surface of the drum portion, and the convex portion of the other surface of the clutch support portion may be in line contact with the edge surface of the clutch drum.

[0019] The bracket support portion may protrude in a “U” shape, and a protruding portion provided at a middle portion of the bracket support portion may contact the rod bracket surface.

[0020]

Beneficial effects

[0021] According to the technical solution of the present application, the elastic member reduces operation noise and abnormal noise caused by friction between the rotating part and the fixed part when the pumping device is operated, thereby improving the quality and operation performance of the product and more stably performing the pumping operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a view showing a configuration in which the elastic member according to the present application is disposed in a pumping device.

[0023] Figure 2 is a view for explaining a coupling relationship of the elastic member according to the present application.

[0024] Figure 3 is a view showing a rod support and an elastic member according to the present application.

[0025] Figure 4 is a perspective view showing an elastic member according to the present application. DETAILED DESCRIPTION

[0026] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0027] The pumping device of the present application includes a housing 30 fixed to a seat cushion (not shown) and a clutch device 40 disposed in the housing 30.

[0028] Further, a rod support 20 is fixed to a clutch cam 41 constituting the clutch device 40, and a pumping rod 10 is coupled to the rod support 20 so that the clutch device 40 is rotated by rotation of the pumping rod 10.

[0029] Further, a brake device 50 is disposed in the housing 30, and a pinion 51 is coupled to the brake device 50 so that the rotational force transmitted to the clutch device 40 is output through the pinion 51 and the seat is moved upward or downward.

[0030] However, since a description of a specific configuration of the clutch device 40 and the brake device 50 and a description of a pumping operation using these components are well-known technologies, specific descriptions thereof will be omitted.

[0031] On the other hand, Figure 1 is a view showing a configuration in which the elastic member 60 according to the present application is disposed in a pumping device, Figure 2 is a view for explaining a coupling relationship of the elastic member 60 according to the present application.

[0032] The distinguished technical configuration of the present application will be described in detail with reference to the accompanying drawings. The pumping device includes a lever bracket 20 coupled to a lever, a housing 30 in which a clutch device 40 is provided and coupled to a position toward the lever bracket 20 through the clutch device 40, and an elastic member 60 elastically supported on the lever bracket 20 while providing an elastic restoring force in a direction to offset eccentric movement of the clutch device 40 with respect to a rotational axis.

[0033] That is, because the pumping lever 10 and the lever bracket 20 are fixed to each other by a bolt connection or the like, the lever bracket 20 rotates when the pumping lever 10 performs a pumping operation. Therefore, even in the case where a force is applied to the pumping lever 10 in a transverse direction, the lever bracket 20 can freely move to the left and right, so that the rotational axis of the lever bracket 20, the clutch device 40, and the brake device 50 is bent and eccentrically arranged.

[0034] Therefore, in the present application, the elastic member 60 is used to provide an elastic restoring force to the clutch device 40 in a direction opposite to the direction in which the clutch device 40 is bent and eccentrically arranged, which prevents the rotational axis of the clutch device 40 from being eccentrically arranged. Therefore, the rotational axes of the clutch device 40, the brake device 50, and the pinion gear 51 are coaxially arranged, which prevents the clutch device 40, the brake device 50, and the pinion gear 51 from being eccentrically arranged.

[0035] In particular, the elastic member 60 supports the lever bracket 20, which freely moves to the left and right, so that the lever bracket 20 performs a pumping operation while directly generating friction with the elastic member 60.

[0036] Therefore, it is possible to reduce operational noise and abnormal noise caused by friction between rotating parts and fixed parts when the pumping device operates, which makes it possible to improve the quality and operational performance of a product and more stably perform a pumping operation.

[0037] Further, as shown in Figure 1 and Figure 2 A through-hole 31 can be formed in one surface of the housing 30 toward the lever bracket 20. The elastic member 60 can be provided between the inner surface of the housing 30 and the clutch device 40 and supported on the lever bracket 20 while passing through the through-hole 31.

[0038] For example, a cylindrical drum portion 32 can be provided in the center of the housing 30, and three through-holes 31 can be formed along the outer periphery of the drum portion 32 and provided at equal angles.

[0039] Further, the elastic member 60 can be provided in the drum portion 32, and the elastic member 60 partially points to the lever bracket 20 through the through-hole 31. Therefore, as the elastic member 60 partially passes through the through-hole 31, the elastic member 60 is supported on the lever bracket 20.

[0040] For reference, the through-hole 31 is provided in the form of a quadrangular hole. The length of the through-hole 31 in the horizontal width direction of the through-hole 31 can correspond to or be longer than the length of the elastic member 60 in the width direction in which the elastic member 60 passes through the through-hole 31.

[0041] Figure 3 is a view showing the rod holder 20 and the elastic member 60 according to the present application, and Figure 4 is a perspective view showing the elastic member 60 according to the present application.

[0042] The elastic member 60 will be described more specifically with reference to the accompanying drawings. The elastic member 60 includes a clutch support portion 60a having a wave shape in a circumferential direction thereof and provided between an inner surface of the housing 30 and the clutch device 40, and a holder support portion 60b protruding from the clutch support portion 60a toward the rod holder 20 and configured to pass through the through-hole 31.

[0043] For example, the clutch support portion 60a is provided in the form of a wave-shaped washer having a ring structure with a wave shape. The clutch support portion 60a is provided between the inner surface of the drum portion 32 and the clutch device 40.

[0044] Further, the holder support portion 60b is provided along the clutch support portion 60a and formed at a position corresponding to the through-hole 31. The holder support portion 60b passes through the through-hole 31 to the outside.

[0045] Accordingly, the clutch support portion 60a provides an elastic restoring force in a direction opposite to a direction in which components such as the clutch device 40 and the brake device 50 in the housing 30 are bent and eccentrically arranged. Further, the holder support portion 60b supports the rod holder 20 such that the rod holder 20 performs a pumping operation while directly generating friction with the elastic member 60.

[0046] Further, referring to Figure 2 , the clutch support portion 60a has a structure in which one surface of the clutch support portion 60a is supported on an inner surface of a cylindrical drum portion 32 provided at the center of the housing 30, and the other surface of the clutch support portion 60a is supported on an edge surface of a clutch drum 42 provided to surround the clutch device 40. The edge surface faces the inner surface of the drum portion 32.

[0047] Further, the holder support portion 60b has a structure in which one end of the holder support portion 60b is fixed to one surface of the clutch support portion 60a, and the other end of the holder support portion 60b is supported on the rod holder 20 facing the housing 30.

[0048] The holder support portion 60b protrudes in a "U" shape, and a protruding portion of a middle portion of the holder support portion 60b is in surface contact with the rod holder 20.

[0049] That is, the clutch support portion 60a is supported between the drum portion 32 and the clutch drum 42, and eccentric movement of the clutch drum 42 is suppressed, thereby preventing the internal components from being arranged eccentrically with respect to the rotational axis of the clutch device 40.

[0050] In addition, the bracket support portion 60b has leg portions 61 formed at both opposite ends, and the leg portions 61 are integrally formed with the clutch support portion 60a. A connecting portion 62 is formed between the leg portions 61 such that the connecting portion 62 is in surface contact with the surface of the rod bracket 20 toward the housing 30.

[0051] Further, as Figure 3 indicated, one surface of the clutch support portion 60a can be in contact with the inner surface of the drum portion 32 while being disposed on the same plane as the inner surface of the drum portion 32. The other surface of the clutch support portion 60a can be in contact with the edge surface of the clutch drum 42 while being disposed on the same plane as the edge surface of the clutch drum 42.

[0052] Accordingly, the two opposite surfaces of the clutch support portion 60a are in uniform contact with the drum portion 32 and the clutch drum 42, which increases the support area. Thus, the components in the housing 30 are more stably supported.

[0053] Accordingly, the convex portion of one surface of the clutch support portion 60a can be in line contact with the inner surface of the drum portion 32, and the convex portion of the other surface of the clutch support portion 60c can be in line contact with the edge surface of the clutch drum 42.

[0054] That is, because the clutch support portion 60a is formed in a wavy shape, the convex portion of one surface of the clutch support portion 60 is supported while being in line contact with the inner surface of the drum portion 32, and the convex portion of the other surface of the clutch support portion 60 is supported while being in line contact with the edge of the clutch drum 42.

[0055] Accordingly, it is possible to prevent stress from being concentrated in specific portions of the drum portion 32 and the clutch drum 42, thereby improving the durability of the components.

[0056] In this configuration, in a case where the rod bracket 20 is bent to one side due to the free leftward and rightward movement of the pumping rod 10, one side of the rod bracket 20 is eccentrically rotated toward the housing 30.

[0057] Then, the eccentric portion of the rod bracket 20 is supported by the bracket support portion 60b existing in the corresponding eccentric position, such that the rod bracket 20 is supported by the bracket support portion 60b, thereby suppressing excessive eccentric rotation of the rod bracket 20.

[0058] Further, due to the free leftward and rightward movement of the pumping rod 10, the clutch drum 42 is also bent toward one side with respect to the rotational axis. In this case, the clutch drum 42 is bent toward the drum portion 32 and pushes a portion of the clutch support portion 60a located at the corresponding portion.

[0059] Then, the pushed portion is elastically recovered by the elastic restoring force of the clutch support portion 60a, and the rotational axis of the clutch drum 42 is also recovered to a state in which the rotational axis of the clutch drum 42 is not bent. Accordingly, the rotational axes of the clutch device 40, the brake device 50, and the pinion gear 51 are coaxially disposed.

[0060] As described above, in the present application, the elastic member 60 is used to provide the elastic restoring force to the clutch device 40 in a direction opposite to the direction in which the clutch device 40 is bent and eccentrically disposed, which prevents the rotational axis of the clutch device 40 from being eccentrically disposed. Accordingly, the rotational axes of the clutch device 40, the brake device 50, and the pinion gear 51 are coaxially disposed, which prevents the clutch device 40, the brake device 50, and the pinion gear 51 from being eccentrically disposed.

[0061] In particular, the elastic member 60 supports the rod holder 20 which moves freely leftward and rightward, such that the rod holder 20 performs the pumping operation while directly generating friction with the elastic member 60.

[0062] Accordingly, the elastic member 60 reduces the operation noise and abnormal noise caused by the friction between the rotating part and the fixed part when the pumping device operates, which makes it possible to improve the quality and operation performance of the product and to more stably perform the pumping operation.

[0063] Although the present application has been described with reference to a specific embodiment, it is apparent to those skilled in the art that various modifications and changes can be made within the scope of the technical idea of the present application, and such modifications and changes belong to the appended claims.

[0064] [Explanation of Reference Numerals]

[0065] 10: Pumping rod

[0066] 20: Rod holder

[0067] 30: Housing

[0068] 31: Through-hole

[0069] 32: Drum portion

[0070] 40: Clutch device

[0071] 41: Clutch cam

[0072] 42: Clutch drum

[0073] 50: brake device

[0074] 51: pinion

[0075] 60: elastic member

[0076] 60a: clutch support portion

[0077] 60b: bracket support portion

[0078] 61: leg portion

[0079] 62: connecting portion

Claims

1. An anti-eccentric device for a pumping device, the anti-eccentric device comprising: a rod support coupled to a pumping rod; a housing in which a clutch device is disposed and one surface of which is disposed toward a position of the rod support and the clutch device, a through-hole being formed in the one surface of the housing; and a resilient member elastically supported on the rod support while providing a resilient restoring force in a direction of canceling eccentric motion of the clutch device bent with respect to a rotational axis, a portion of the resilient member passing through the through-hole of the housing. The resilient member is disposed between an inner surface of the housing and the clutch device, and the portion of the resilient member is supported on the rod support.

2. The anti-eccentricity device of claim 1, wherein, The resilient member comprises:

3. The anti-eccentricity device of claim 2, wherein, a clutch support portion having a wavy shape in a circumferential direction and disposed between the inner surface of the housing and the clutch device; and a support support portion protruding from the clutch support portion toward the rod support and passing through the through-hole. One surface of the clutch support portion is supported on an inner surface of a cylindrical drum portion disposed in the center of the housing, the other surface of the clutch support portion is supported on an edge surface of a clutch drum disposed to surround the clutch device, and the edge surface of the clutch drum faces the inner surface of the drum portion, and 4. The anti-eccentricity device of claim 3, wherein, One end of the support support portion is fixed to one surface of the clutch support portion, and the other end of the support support portion is supported on the rod support toward the housing. One surface of the clutch support portion is in contact with the inner surface of the drum portion while being disposed on the same plane as the inner surface of the drum portion, and the other surface of the clutch support portion is in contact with the edge surface of the clutch drum while being disposed on the same plane as the edge surface of the clutch drum.

5. The anti-eccentricity device of claim 4, wherein, A convex portion of one surface of the clutch support portion is in line contact with the inner surface of the drum portion, and a convex portion of the other surface of the clutch support portion is in line contact with the edge surface of the clutch drum.

6. The anti-eccentricity device of claim 5, wherein, The support support portion protrudes in a "U" shape, and a protruding portion of an intermediate portion of the support support portion is in contact with the rod support surface.

7. The anti-eccentricity device of claim 3, wherein, The support support portion protrudes in a "U" shape, and a protruding portion of an intermediate portion of the support support portion is in contact with the rod support surface.

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