Moving device for seat slide rail of automobile

Abstract

The invention provides a moving device for a seat slide rail of an automobile, and the moving device comprises a housing; the guide nut is mounted in the shell, is screwed on a guide screw penetrating through the shell, and can move along the guide screw; a worm wheel coupled to an outer diameter portion of the guide nut; the locking component is arranged between the outer diameter part of the guide nut and the inner diameter part of the worm wheel; and a clutch drum coupled to an outer diameter portion of one side of the guide nut so as to face the worm wheel, the clutch drum releasing the lock state of the lock member by a coupling operation so as to block power of the worm wheel from being transmitted to the guide nut.

Description

Technical Field

[0001] This invention relates to a moving device for a seat rail in an automobile. Background Technology

[0002] Typically, seats can be installed in vehicles. Car seats may include a backrest for supporting the upper body of the passenger, a seat cushion for supporting the lower body of the passenger, and a headrest for supporting the head.

[0003] Seat rails used in the second or third row of SUVs (Sport Utility Vehicles) or MPVs (Multi Purpose Vehicles) are longer than those used in ordinary sedans.

[0004] Vehicle seats can be divided into power seats or manual seats. Power seats move to the desired position by simply operating a switch to drive a motor, while manual seats can be moved manually.

[0005] Existing seat rails for automobiles can include a lower slide rail fixed to the floor panel and an upper slide rail connected to the lower slide rail, which can move back and forth along the lower slide rail and is connected to the vehicle seat. In electric seats, the movement of the upper slide rail is driven by a motor, and multiple gears (pinion gears, racks, etc.) for moving the upper slide rail can be installed inside the lower slide rail.

[0006] However, because existing electric drive systems for car seats do not have independent control devices, it is difficult to move or stop the seat quickly.

[0007] Existing technical documents

[0008] Patent documents

[0009] (Patent Document 1) Korean Patent Publication No. 10-2023-0161765 (Published on 2023.11.28) Summary of the Invention

[0010] To address the aforementioned problems, the present invention provides a moving device for a car seat slide rail, wherein the moving device can, through the engagement of a clutch drum, block the transmission of power from the power source to the guide nut via a worm gear.

[0011] To achieve the aforementioned objective, the present invention provides a moving device for a seat slide rail in an automobile, wherein the moving device comprises: a housing; a guide nut, which is installed inside the housing and screwed onto a guide screw passing through the housing, and is movable along the guide screw; a worm gear, which is coupled to the outer diameter portion of the guide nut; a locking member, which is disposed between the outer diameter portion of the guide nut and the inner diameter portion of the worm gear; and a clutch drum, which is coupled to one side of the outer diameter portion of the guide nut opposite to the worm gear, thereby releasing the locking state of the locking member through engagement to block the power transmission of the worm gear to the guide nut.

[0012] Furthermore, the locking components may include: a pair of first locking components and a second locking component disposed on one side of the inner diameter portion of the worm gear; and a pair of third locking components and a fourth locking component disposed on the other side of the inner diameter portion of the worm gear. The clutch drum may include: a pair of first engagement protrusions and a second engagement protrusion disposed on one side of the clutch drum facing the worm gear; and a key, at least one key being provided in the inner diameter portion of the clutch drum, the key engaging in a keyway provided in the guide nut along its outer length direction and being slidably movable.

[0013] Furthermore, a support member may be provided between the worm gear and the clutch drum. The support member has a first support protrusion and a second support protrusion on one side that are inserted into the inner diameter of the worm gear, and a first support surface, a second support surface, a third support surface and a fourth support surface around one side of the guide nut.

[0014] Furthermore, the first locking component may include: a first elastic body located on one side of the inner diameter portion of the worm wheel, with one end of the first elastic body supported by the first support protrusion; and a first roller, which is pressed by the elastic force of the first elastic body and engaged between the inner diameter portion of the worm wheel and one end of the first support surface, thereby enabling the worm wheel and the guide nut to rotate integrally. The second locking component may include: a second elastic body located on one side of the inner diameter portion of the worm wheel, the second elastic body opposite to the first elastic body, with one end of the second elastic body supported by the second support protrusion; and a second roller, which is opposite to the first roller, pressed by the elastic force of the second elastic body, and engaged between the inner diameter portion of the worm wheel and one end of the second support surface, thereby enabling the worm wheel and the guide nut to rotate integrally. The third locking component may include: a third elastic body located on the other side of the inner diameter portion of the worm gear, with one end of the third elastic body supported by the first support protrusion; and a third roller, which is pressed by the elastic force of the third elastic body and engaged between the inner diameter portion of the worm gear and one end of the third support surface, thereby enabling the worm gear and the guide nut to rotate integrally. The fourth locking component may include: a fourth elastic body located on the other side of the inner diameter portion of the worm gear, opposite to the third elastic body, with one end of the fourth elastic body supported by the second support protrusion; and a fourth roller, which is opposite to the third roller, pressed by the elastic force of the fourth elastic body, and engaged between the inner diameter portion of the worm gear and one end of the fourth support surface, thereby enabling the worm gear and the guide nut to rotate integrally.

[0015] Furthermore, the width between the inner diameter of the worm gear and the first and second support surfaces can be configured to gradually widen from one end of the first and second support surfaces toward the other end, and the width between the inner diameter of the worm gear and the third and fourth support surfaces can be configured to gradually widen from one end of the third and fourth support surfaces toward the other end.

[0016] Moreover, the first roller and the second roller can be released from engagement when the first engaging protrusion inserted between the first roller and the second roller is pushed toward the other end of the first support surface and the second support surface.

[0017] Moreover, the third roller and the fourth roller can be released from engagement at the same time as the second engaging protrusion inserted between the third roller and the fourth roller is pushed toward the other end of the third support surface and the fourth support surface.

[0018] Furthermore, the support member and the clutch drum can be elastically supported by an elastic member disposed between the support member and the clutch drum.

[0019] Furthermore, a shift ring is attached to the outer diameter portion of the clutch drum. The shift ring may include: a body, which has an annular structure and is composed of an inner ring portion and an outer ring portion, wherein the inner ring portion is inserted into a engagement groove formed on the outer diameter portion of the clutch drum; and a cut portion formed between one end and the other end of the body.

[0020] Furthermore, the connecting pin can be configured to pass through one end of the body, one end of the lever, and the other end of the body while one end of the lever is inserted into the cutout of the body.

[0021] Furthermore, due to the force acting on the lever, when the clutch drum moves in the engagement direction, the elastic member is compressed. When the external force acting on the lever disappears, the clutch drum can move in the disengagement direction by the restoring force of the elastic member.

[0022] Furthermore, the worm gear can be connected to a power source via a power transmission component.

[0023] Furthermore, the power transmission component may be composed of a belt, and the gear portion disposed in the inner diameter portion of the power transmission component and the gear portion disposed in the outer diameter portion of the worm gear may mesh with each other.

[0024] Furthermore, by processing the first to fourth support surfaces, steps corresponding to the first to fourth support surfaces can be formed on the outer diameter portion of the guide nut. The first locking member can be fitted and supported on the step of the first support surface, the second locking member can be fitted and supported on the step of the second support surface, the third locking member can be fitted and supported on the step of the third support surface, and the fourth locking member can be fitted and supported on the step of the fourth support surface.

[0025] Invention Effects

[0026] This invention can achieve multiple driving modes by controlling the power transmission and disconnection between the worm gear and the guide nut.

[0027] Furthermore, the present invention can enhance passenger satisfaction through a variety of seat sliding options.

[0028] Furthermore, this invention can apply the Walk-in function to long guide rail systems. Attached Figure Description

[0029] Figure 1This is a perspective view of a moving device for a car seat slide rail according to a preferred embodiment of the present invention, in conjunction with a guide screw.

[0030] Figure 2 This is a side view of a moving device for a car seat slide rail according to a preferred embodiment of the present invention, in conjunction with a lead screw.

[0031] Figure 3 This is a perspective view of a moving device for a car seat slide rail according to a preferred embodiment of the present invention.

[0032] Figure 4 This is an exploded perspective view of a moving device for a car seat slide rail according to a preferred embodiment of the present invention.

[0033] Figure 5 This is a diagram showing a clutch drum according to a preferred embodiment of the present invention.

[0034] Figure 6 This is a diagram illustrating the shift ring and lever according to a preferred embodiment of the present invention.

[0035] Figure 7 This is a side view showing the engagement operation of the clutch drum according to a preferred embodiment of the present invention.

[0036] Figure 8 This is a perspective view showing the engagement action of the clutch drum according to a preferred embodiment of the present invention.

[0037] Figure 9 yes Figure 7 The AA-line cross-sectional view shows the action of the locking component when the clutch drum engages.

[0038] In the picture:

[0039] 10: Housing, 12: Locking part, 20: Lead screw, 30: Lead nut, 31: First support surface, 32: Second support surface, 33: Third support surface, 34: Fourth support surface, 35: Keyway, 36: Step, 40: Worm gear, 42: Gear part, 50: Clutch drum, 51: Key, 52: First engagement protrusion, 521: End, 53: Second engagement protrusion, 531: End, 54: Engagement groove, 60: Shift ring, 61: Body, 611: Inner ring part, 612: Outer ring part, 613: One side end, 614: The other side end, 615: Cutout part, 71: First locking component, 711: First roller, 712: First elastic body, 72: Second locking component, 721: Second roller, 722: Second elastic body, 73: Third locking component, 731: Third roller, 732: Third elastic body, 74: Fourth locking component, 741: Fourth roller, 742: Fourth elastic body, 80: Support component, 81: First support protrusion, 82: Second support protrusion, 83: Key, 90: Power transmission component, 91: Gear section, B: Bearing, L: Lever, P: Connecting pin, S: Elastic component, W: Width, W1: Width, W2: Width Detailed Implementation

[0040] The preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. First, it should be noted that when labeling the constituent elements of the drawings, the same reference numerals should be used as much as possible for the same constituent elements, even in different drawings. Furthermore, in describing the present invention, detailed descriptions will be omitted if it is determined that a specific explanation of a known structure or function would obscure the essence of the invention. Moreover, although a preferred embodiment of the present invention will be described below, the technical concept of the present invention is not limited to or restricted thereto, and can be implemented in various ways by those skilled in the art.

[0041] Figure 1 This is a perspective view of a moving device for a car seat slide rail according to a preferred embodiment of the present invention, in conjunction with a guide screw. Figure 2 This is a side view of a moving device for a car seat slide rail according to a preferred embodiment of the present invention, in conjunction with a guide screw. Figure 3 This is a perspective view of a moving device for a car seat slide rail according to a preferred embodiment of the present invention. Figure 4 This is an exploded perspective view of a moving device for a car seat slide rail according to a preferred embodiment of the present invention.

[0042] like Figures 1 to 4As shown, the present invention may include: a housing 10; a guide nut 30, which is coupled inside the housing 10; a worm gear 40, which is coupled inside the housing 10 to the outer diameter portion of the guide nut 30; at least one locking member, which is disposed between the inner diameter portion of the worm gear 40 and the outer diameter portion of the guide nut 30; a clutch drum 50, which is coupled to the guide nut 30 in a manner opposite to the worm gear 40; a support member 80, which is located between the guide nut 30 and the clutch drum 50; and an elastic member S, which is located between the support member 80 and the clutch drum 50.

[0043] The support member 80 and the clutch drum 50 can be elastically supported by an elastic member S disposed between the support member 80 and the clutch drum 50. The elastic member S can be a spring.

[0044] The lead screw 20 can penetrate the housing 10 for connection. The housing 10 can move along the lead screw 20.

[0045] The lead screw 20 can be inserted into and engaged with the lower guide rail (not shown). The lower guide rail (not shown) can be engaged with the floor panel inside the vehicle (not shown). The housing 10 can be connected to the upper guide rail (not shown). The upper guide rail (not shown) can be connected to the vehicle seat (not shown). As the housing 10 moves, the vehicle seat (not shown) connected to the upper guide rail (not shown) can be moved.

[0046] The guide nut 30 is threadedly engaged with the guide screw 20 that penetrates the housing 10 and can move along the guide screw 20.

[0047] The guide nut 30 may include a keyway 35, a first support surface 31, a second support surface 32, a third support surface 33, and a fourth support surface 34. The keyway 35 may be provided along the length direction of the guide nut 30. At least one keyway 35 may be provided. The keyways 35 may be provided opposite to each other on both sides.

[0048] The worm gear 40 may include a gear portion 42. The gear portion 42 may be provided on the outer diameter portion of the worm gear 40. The worm gear 40 may be connected to a power source (not shown) via a power transmission component 90 such as a belt.

[0049] A gear portion 91 may be provided in the inner diameter portion of the power transmission component 90. The gear portion 91 of the power transmission component 90 may mesh with the gear portion 42 of the worm gear 40. The power source (not shown) may be a motor.

[0050] Power from the power source (not shown) can be transmitted to the worm gear 40 via the power transmission component 90. The worm gear 40 can be supported by a bearing B that is coupled inside the housing 10 to limit movement.

[0051] The support member 80 may include a first support protrusion 81 and a second support protrusion 82 located on one side thereon. The first support protrusion 81 and the second support protrusion 82 can be inserted into the inner diameter portion of the worm gear 40. The inner diameter portions of the first support protrusion 81 and the second support protrusion 82 may be provided with a key 83. The key 83 can be inserted into the keyway 35 of the guide nut 30.

[0052] The locking components may include: a first locking component 71, a second locking component 72, a third locking component 73, and a fourth locking component 74. The first locking component 71 and the second locking component 72 may be provided on one side of the inner diameter portion of the worm gear 40. The third locking component 73 and the fourth locking component 74 may be provided on the other side of the inner diameter portion of the worm gear 40.

[0053] The first locking component 71 may include a first elastic body 712 and a first roller 711. The first elastic body 712 may be a spring.

[0054] One end of the first elastic body 712 can be supported by the first support protrusion 81 on one side of the inner diameter of the worm gear 40.

[0055] The first roller 711 can be elastically supported by the first elastic body 712 at the other end. The first roller 711 can be pushed by the elastic force of the first elastic body 712 and inserted between the inner diameter of the worm gear 40 and one end of the first support surface 31. When the first roller 711 is clamped, the worm gear 40 and the guide nut 30 can rotate together.

[0056] The second locking component 72 may include a second elastic body 722 and a second roller 721. The second elastic body 722 may be a spring.

[0057] The second elastic body 722 may be disposed opposite to the first elastic body 712 on one side of the inner diameter portion of the worm gear 40. One end of the second elastic body 722 may be supported by the second support protrusion 82 on one side of the inner diameter portion of the worm gear 40.

[0058] The second roller 721 is disposed opposite to the first roller 711 on one side of the inner diameter portion of the worm gear 40. The second roller 721 is elastically supported by the second elastic body 722 at the other end. The second roller 721 can be pushed by the elastic force of the second elastic body 722 and inserted between the inner diameter portion of the worm gear 40 and one end of the second support surface 32. When the second roller 721 is clamped, the worm gear 40 and the guide nut 30 can rotate together.

[0059] The third locking component 73 may include a third elastic body 732 and a third roller 731. The third elastic body 732 may be a spring.

[0060] One end of the third elastic body 732 can be supported by the first support protrusion 81 on the inner diameter of the other side of the worm gear 40.

[0061] The third roller 731 can be elastically supported by the third elastic body 732 at the other end. The third roller 731 can be pushed by the elastic force of the third elastic body 732 and inserted between the inner diameter of the worm gear 40 and one end of the third support surface 33. When the third roller 731 is clamped, the worm gear 40 and the guide nut 30 can rotate together.

[0062] The fourth locking component 74 may include a fourth elastic body 742 and a fourth roller 741. The fourth elastic body 742 may be a spring.

[0063] The fourth elastic body 742 is disposed opposite to the third roller 731 on the other side of the inner diameter portion of the worm gear 40. The fourth roller 741 is elastically supported by the fourth elastic body 742 at the other end. The fourth roller 741 can be pushed by the elastic force of the fourth elastic body 742 and inserted between the inner diameter portion of the worm gear 40 and one end of the fourth support surface 34. When the fourth roller 741 is clamped, the worm gear 40 and the guide nut 30 can rotate together.

[0064] By processing the first support surface 31, the second support surface 32, the third support surface 33, and the fourth support surface 34, steps 36 corresponding to the first support surface 31, the second support surface 32, the third support surface 33, and the fourth support surface 34 can be formed on the outer diameter of the guide nut 30. The first locking member 71 is attached to the step 36 of the first support surface 31, the second locking member 72 is attached to the step 36 of the second support surface 32, the third locking member 73 is attached to the step 36 of the third support surface 33, and the fourth locking member 74 is attached to the step 36 of the fourth support surface 34.

[0065] The width W between the inner diameter of the worm gear 40 and the first support surface 31 and the second support surface 32 can be configured to gradually increase from one end of the first support surface 31 and the second support surface 32 to the other end. The width W between the inner diameter of the worm gear 40 and the third support surface 33 and the fourth support surface 34 can be configured to gradually increase from one end of the third support surface 33 and the fourth support surface 34 to the other end.

[0066] For example, the width W2 between the inner diameter of the worm gear 40 and one end of the first support surface 31 and the second support surface 32 can be configured to match the width of the first roller 711 and the second roller 721, so that the first roller 711 and the second roller 721 can be engaged. The width W2 between the inner diameter of the worm gear 40 and one end of the third support surface 33 and the fourth support surface 34 can be configured to match the width of the third roller 731 and the fourth roller 741, so that the third roller 731 and the fourth roller 741 can be engaged.

[0067] For example, the width W1 between the inner diameter of the worm gear 40 and the other end of the first support surface 31 and the second support surface 32 can be configured to be larger than the outer diameter of the first roller 711 and the second roller 721, so that the first roller 711 and the second roller 721 can be released from engagement. The width W1 between the inner diameter of the worm gear 40 and the other end of the third support surface 33 and the fourth support surface 34 can be configured to be larger than the outer diameter of the third roller 731 and the fourth roller 741, so that the third roller 731 and the fourth roller 741 can be released from engagement.

[0068] Figure 5 This is a diagram showing a clutch drum according to a preferred embodiment of the present invention.

[0069] like Figures 3 to 5 As shown, the engagement of the clutch drum 50 releases the locking states of the first locking component 71, the second locking component 72, the third locking component 73, and the fourth locking component 74. This prevents the power from the power source (not shown) from being transmitted to the guide nut 30 via the worm gear 40.

[0070] The clutch drum 50 may include a first engagement protrusion 52, a second engagement protrusion 53, and a key 51. The first engagement protrusion 52 and the second engagement protrusion 53 may be arranged in pairs on one side of the clutch drum 50. The first engagement protrusion 52 and the second engagement protrusion 53 may protrude toward the worm gear 40.

[0071] The first connecting protrusion 52 and the second connecting protrusion 53 may be formed in a direction that intersects with the first supporting protrusion 81 and the second supporting protrusion 82 to avoid interference with each other.

[0072] For example, if the first support protrusion 81 and the second support protrusion 82 are formed longitudinally, then the first connecting protrusion 52 and the second connecting protrusion 53 can be formed transversely.

[0073] For example, the first engaging protrusion 52 and the second engaging protrusion 53 can be configured such that their widths gradually narrow towards their ends 521 and 531. The width of the end 521 of the first engaging protrusion 52 can match the width between the first roller 711 and the second roller 721. The width of the end 531 of the second engaging protrusion 53 can match the width between the third roller 731 and the fourth roller 741. The deeper the first engaging protrusion 52 is inserted between the first roller 711 and the second roller 721, the greater the width between the first roller 711 and the second roller 721. The deeper the second engaging protrusion 53 is inserted between the third roller 731 and the fourth roller 741, the greater the width between the third roller 731 and the fourth roller 741.

[0074] The first roller 711 and the second roller 721 can be pushed in the unlocking direction by a first engaging protrusion 52 inserted between the first roller 711 and the second roller 721.

[0075] The third roller 731 and the fourth roller 741 can be pushed in the unlocking direction by the second engaging protrusion 53 inserted between the third roller 731 and the fourth roller 741.

[0076] The clutch drum 50 may have at least one key 51 in its inner diameter portion. The key 51 of the clutch drum 50 can be inserted into the keyway 35 of the guide nut 30 and slide stably along the keyway 35.

[0077] Figure 6 This is a diagram illustrating the shift ring and lever according to a preferred embodiment of the present invention.

[0078] like Figure 6 As shown, a shift ring 60 can be attached to the outer diameter portion of the clutch drum 50. The shift ring 60 can be annular in shape.

[0079] The shift ring 60 may include a body 61 and a cutout 615. The body 61 may be composed of an inner ring portion 611 and an outer ring portion 612. The inner ring portion 611 may be inserted into a engagement groove 54 formed on the outer diameter portion of the clutch drum 50.

[0080] A notch 615 may be formed between one end 613 and the other end 614 of the body 61. One end of the lever L may be inserted into the notch 615.

[0081] The lever L and the shift ring 60 can be assembled together by combining pin P.

[0082] The connecting pin P can penetrate one end of the body 613, one end of the lever L and the other end of the body 614 when one end of the cut 615 is inserted into the cut 615.

[0083] The operation of the locking component during engagement of the clutch drum of the present invention will now be described.

[0084] Figure 7 This is a side view showing the engagement operation of the clutch drum according to a preferred embodiment of the present invention. Figure 8 This is a perspective view showing the engagement action of the clutch drum according to a preferred embodiment of the present invention. Figure 9 yes Figure 7 The AA-line cross-sectional view shows the action of the locking component when the clutch drum engages.

[0085] like Figure 7 and Figure 8 As shown, when lever L is subjected to a force, clutch drum 50 can move in the engagement direction.

[0086] At this time, the elastic member S located between the support member 80 and the clutch drum 50 can be compressed by the clutch drum 50.

[0087] like Figure 9 As shown, as the clutch drum 50 moves toward the engagement direction, the first engagement protrusion 52 of the clutch drum 50 can be inserted between the first roller 711 and the second roller 721, and the second engagement protrusion 53 can be inserted between the third roller 731 and the fourth roller 741.

[0088] The first roller 711 can be released from its locked state when it is pushed by the first engagement protrusion 52 of the clutch drum 50 and moves from one end of the first support surface 31 to the other end.

[0089] The second roller 721 can be released from its locked state when it is pushed by the first engagement protrusion 52 of the clutch drum 50 and moves from one end of the second support surface 32 to the other end.

[0090] The third roller 731 can be released from its locked state when it is pushed by the second engagement protrusion 53 of the clutch drum 50 and moves from one end of the third support surface 33 to the other end.

[0091] The fourth roller 741 can be released from the locked state when it is pushed by the second engagement protrusion 53 of the clutch drum 50 and moves from one end of the fourth support surface 34 to the other end.

[0092] Since the worm gear 40 and the guide nut 30 cannot rotate together when the first roller 711, the second roller 721, the third roller 731, and the fourth roller 741 are in the unlocked state, the power from the power source (not shown) cannot be transmitted to the guide nut 30 via the worm gear 40. When the power is transmitted to the guide nut 30 and causes it to rotate, the guide nut 30 can move along the guide screw 20.

[0093] Conversely, when the force applied to lever L disappears, the compressed elastic component S returns to its original state, thereby pushing clutch drum 50 to move in the disengagement direction.

[0094] As the clutch drum 50 is pushed toward the disengagement direction, the first engagement protrusion 52 will disengage from between the first roller 711 and the second roller 721, and the second engagement protrusion 53 will disengage from between the third roller 731 and the fourth roller 741.

[0095] When the first engaging protrusion 52 disengages from between the first roller 711 and the second roller 721, the first roller 711 can be pushed toward one end of the first support surface 31 under the elastic force of the first elastic body 712, and the second roller 721 can be pushed toward one end of the second support surface 32 under the elastic force of the second elastic body 722, thereby achieving a locked state.

[0096] When the second engaging protrusion 53 disengages from between the third roller 731 and the fourth roller 741, the third roller 731 can be pushed towards one end of the third support surface 33 under the elastic force of the third elastic body 732, and the fourth roller 741 can be pushed towards one end of the second support surface 32 under the elastic force of the fourth elastic body 742, thereby achieving a locked state.

[0097] When the first roller 711, the second roller 721, the third roller 731 and the fourth roller 741 are locked, the worm gear 40 and the guide nut 30 can rotate together.

[0098] When the first roller 711, the second roller 721, the third roller 731, and the fourth roller 741 are locked, and the power from the power source (not shown) is transmitted to the power transmission member 90, the power from the power source (not shown) can be transmitted to the guide nut 30 via the power transmission member 90 and the worm gear 40 because the gear part 91 of the power transmission member 90 meshes with the gear part 42 of the worm gear 40, thereby enabling the guide nut 30 to rotate.

[0099] While rotating, the guide nut 30 can move along the guide screw 20 together with the housing 10.

[0100] For example, when lever L is operated manually, after applying force to lever L to move clutch drum 50 in the engagement direction, if lever L is rotated axially in the locking direction, lever L can lock into locking portion 12 provided on housing 10. When lever L is locked into locking portion 12, the movement of clutch drum 50 in the disengagement direction is restricted. If lever L is rotated axially in the disengagement direction, lever L disengages from locking portion 12, realizing the disengagement state of lever L. When lever L is in the disengagement state, the clutch drum 50 can be pushed in the disengagement direction by the elastic force of elastic member S.

[0101] The above description is merely illustrative of the technical spirit of the present invention, and those skilled in the art can make various modifications, alterations, and substitutions without departing from the essential characteristics of the invention. Therefore, the embodiments and drawings disclosed in this invention are not intended to limit but rather to illustrate the technical spirit of the invention, and the scope of the technical spirit of the invention should not be limited by the above embodiments and drawings. The scope of protection of this invention should be interpreted by the scope of the appended claims, and it should be interpreted that all technical ideas within the same scope should be included within the scope of the claims of this invention.

Claims

1. A moving device for a seat slide rail of an automobile, characterized by, The mobile device includes: a housing; a lead nut mounted inside the housing and screwed on a lead screw passing through the housing and movable along the lead screw; a worm wheel combined on an outer diameter portion of the lead nut; a locking member provided between the outer diameter portion of the lead nut and an inner diameter portion of the worm wheel; and a clutch drum combined on a side outer diameter portion of the lead nut opposite to the worm wheel, and releasing a locking state of the locking member by a combined action to block power transmission of the worm wheel to the lead nut.

2. The moving device for a seat slide rail of an automobile according to claim 1, characterized by, The locking member includes: a pair of first and second locking members provided on a side inner diameter portion of the worm wheel; and a pair of third and fourth locking members provided on the other side inner diameter portion of the worm wheel, The clutch drum includes: a pair of first and second combined protrusions provided on a side surface of the clutch drum facing the worm wheel; and a key having at least one key provided on an inner diameter portion of the clutch drum, the key being combined in and slidably moved in a key groove provided in a length direction of the outer side of the lead nut.

3. The moving device for a seat slide rail of an automobile according to claim 2, characterized by, A support member is provided between the worm wheel and the clutch drum, the support member having first and second support protrusions inserted into the inner diameter portion of the worm wheel on one side, a first support surface, a second support surface, a third support surface, and a fourth support surface are provided around one side of the lead nut.

4. The moving device for a seat slide rail of an automobile according to claim 3, characterized by, The first locking member includes: a first elastic body on the side inner diameter portion of the worm wheel, a side end portion of the first elastic body being supported by the first support protrusion; and a first roller being pushed by an elastic force of the first elastic body and being engaged between the inner diameter portion of the worm wheel and a side end portion of the first support surface, thereby allowing the worm wheel and the lead nut to be integrally rotatable, The second locking member includes: a second elastic body on the side inner diameter portion of the worm wheel, the second elastic body being opposite to the first elastic body, and a side end portion of the second elastic body being supported by the second support protrusion; and a second roller being opposite to the first roller, being pushed by an elastic force of the second elastic body, and being engaged between the inner diameter portion of the worm wheel and a side end portion of the second support surface, thereby allowing the worm wheel and the lead nut to be integrally rotatable, The third locking member includes: a third elastic body on the other side inner diameter portion of the worm wheel, a side end portion of the third elastic body being supported by the first support protrusion; and a third roller being pushed by an elastic force of the third elastic body and being engaged between the inner diameter portion of the worm wheel and a side end portion of the third support surface, thereby allowing the worm wheel and the lead nut to be integrally rotatable, The fourth locking member includes: a fourth elastic body on the other side inner diameter portion of the worm wheel, the fourth elastic body being opposite to the third elastic body, and a side end portion of the fourth elastic body being supported by the second support protrusion; and a fourth roller being opposite to the third roller, being pushed by an elastic force of the fourth elastic body, and being engaged between the inner diameter portion of the worm wheel and a side end portion of the fourth support surface, thereby allowing the worm wheel and the lead nut to be integrally rotatable.

5. The moving device for a seat slide rail of an automobile according to claim 4, characterized by, The width between the inner diameter portion of the worm gear and the first and second support surfaces is configured to gradually widen from one side end portion toward the other side end portion of the first and second support surfaces. The width between the inner diameter portion of the worm gear and the third and fourth support surfaces is configured to gradually widen from one side end portion toward the other side end portion of the third and fourth support surfaces.

6. The moving device for a seat slide rail of an automobile according to claim 4, characterized by, The first and second rollers are pushed by the first coupling protrusion interposed between the first and second rollers toward the other side end portions of the first and second support surfaces, thereby releasing the engaged state.

7. The moving device for a seat slide rail of an automobile according to claim 4, characterized by, The third and fourth rollers are pushed by the second coupling protrusion interposed between the third and fourth rollers toward the other side end portions of the third and fourth support surfaces, thereby releasing the engaged state.

8. The moving device for a seat slide rail of an automobile according to claim 3, characterized by, The support member and the clutch drum are elastically supported by an elastic member provided between the support member and the clutch drum.

9. The moving device for a seat slide rail of an automobile according to claim 8, characterized by, A shift ring is coupled to the outer diameter portion of the clutch drum. The shift ring includes: a body in a ring structure composed of an inner ring portion and an outer ring portion, the inner ring portion being coupled and inserted into a coupling groove formed on the outer diameter portion of the clutch drum; and a cutout portion formed between one side end portion and the other side end portion of the body.

10. The moving device for a seat slide rail of an automobile according to claim 9, characterized by, A coupling pin is coupled to pass through one side end portion of the body, one side end portion of a lever, and the other side end portion of the body in a state where one side end portion of the lever is inserted into the cutout portion of the body.

11. The moving device for a seat slide rail of an automobile according to claim 10, characterized by, The elastic member is compressed when the clutch drum moves toward the coupling direction due to a force acting on the lever, and the clutch drum moves toward the decoupling direction by the restoring force of the elastic member when the external force acting on the lever disappears.

12. The moving device for a seat slide rail of an automobile according to claim 1, characterized by, The worm gear is connected to a power source by a power transmission member.

13. The moving device for a seat slide rail of an automobile according to claim 12, characterized by, The power transmission member is composed of a belt, and a gear portion provided to the inner diameter portion of the power transmission member is engaged with a gear portion provided to the outer diameter portion of the worm gear.

14. The moving device for a seat slide rail of an automobile according to claim 4, characterized by, A step corresponding to each of the first to fourth support surfaces is formed on the outer diameter portion of the guide nut by machining the first to fourth support surfaces, the first locking member is supported on the step of the first support surface, the second locking member is supported on the step of the second support surface, the third locking member is supported on the step of the third support surface, and the fourth locking member is supported on the step of the fourth support surface.

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