Manual height adjusting pump for automobile seat
By using a handle bracket, elastic locking member, clutch connecting shell and operating mechanism in the manual height-regulating pump of the car seat, the problem of insufficient locking reliability and rotation consistency in traditional designs is solved, and a more stable and reliable seat height-regulating effect is achieved.
Patent Information
- Application Number
- CN202422614474.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The manual-loading pump of traditional car seats has poor lock reliability during long-term use and vibration, and the consistency of the handle rotation clearance and reduction amount for each operation is poor.
The design includes a handle bracket, elastic locking member, clutch connecting shell and operating mechanism is adopted, and locking reliability and rotation consistency are improved by the cooperation of unlocking support arms, elastic locking members and operating mechanism.
It effectively improves the product lock reliability and the consistency of the rotation clearance and reduction of the handle each time, and improves the stability and reliability of seat height adjustment.
Smart Images
Figure CN222977283U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of height adjustment pumps for vehicle seats, and particularly to a manual height adjustment pump for vehicle seats. Background Art
[0002] A height adjustment pump is a component installed on a vehicle seat for realizing seat height adjustment, which has a relatively crucial impact on the comfort of the vehicle seat. The working principle of the height adjustment pump is to change the angle of the seat pan four-link mechanism to change the height of the seat pan, so that the seat cushion can be raised or lowered according to the needs of the passengers. The height adjustment pump mainly consists of a locking mechanism, an operating mechanism (ratchet), and an output mechanism, and the locking principle and ratchet principle designed by each manufacturer are different.
[0003] Currently, a conventional manual height adjustment pump includes a mounting shell, a handle bracket, a bottom cover, and a power output shaft. An operating mechanism is arranged inside the mounting shell. Usually, the operating mechanism includes a rotating cam provided with a mounting shaft and rollers. The rollers are installed between the outer wall of the rotating cam and the mounting shell. When the rotating cam rotates forward or backward, it will drive the rollers to move. At the same time, there is a structure with a continuously decreasing distance between the rotating boss and the outer wall. When the gap between the rollers is small during the movement of the rollers, mutual locking occurs.
[0004] However, the inventor believes that the defects of this traditional design are as follows: 1. The locking reliability is relatively poor after long-term use of the product and during vibrations; 2. During height adjustment, due to the gap between the rollers, the consistency of the handle rotation gap and reduction amount during each operation is poor during the height adjustment rotation work. Summary of the Utility Model
[0005] In order to effectively improve the poor locking reliability and the poor consistency of the handle rotation gap and reduction amount during each operation.
[0006] A manual height adjustment pump for vehicle seats provided by this application adopts the following technical solutions:
[0007] A manual height adjustment pump for an automotive seat, comprising a mounting shell, a handle bracket, a bottom cover, and a power output shaft. A power input end and a power output end are provided on the mounting shell. The handle bracket is rotatably arranged at the power input end of the mounting shell. The bottom cover is mounted at the power output end of the mounting shell. The power output shaft passes through the bottom cover. A clutch connection shell is arranged in the space between the end cover at the power input end and the bottom cover inside the mounting shell. The clutch connection shell includes an annular outer shell body and a chassis. The chassis is arranged on the side of the outer shell body away from the end cover. A first auxiliary cavity is formed between the outer shell body and the inner wall of the mounting shell. An elastic locking member that cooperates with and locks the outer shell body is installed in the first auxiliary cavity. An unlocking arm that passes through the end cover and extends into the first auxiliary cavity is provided on the handle bracket. The unlocking arm cooperates with the elastic locking member to unlock. A second auxiliary cavity is formed among the outer shell body, the chassis, and the end cover. A first operating mechanism is arranged in the second auxiliary cavity. A third auxiliary cavity is arranged between the chassis and the bottom cover. A second operating mechanism connected to the power output shaft is arranged in the third auxiliary cavity.
[0008] In some embodiments, an outer ring is provided at the edge of the end cover. An inner ring is provided on the end cover. At least one spring installation area is arranged between the inner ring and the outer ring. Two partition blocks are arranged at intervals on the outer wall of the inner ring of the spring installation area. There is a gap between the partition blocks and the inner wall of the outer ring. An elastic member is installed in the spring installation area between the two partition blocks. On the handle bracket, a number of toggle arms corresponding in number and position to the partition blocks are arranged towards the spring installation area. The toggle arms are respectively arranged at the gaps between the partition blocks and the inner wall of the outer ring. An arc-shaped groove is provided at the position corresponding to the unlocking arm on the end cover. The arc-shaped groove is located in the area between the inner ring and the outer ring. The unlocking arm is installed on the toggle arm at the position of the arc-shaped groove and passes through the arc-shaped groove.
[0009] In some embodiments, the elastic locking member includes a mounting support, two elastic arms, and a locking arm. The mounting support, the two elastic arms, and the locking arm form a structure with an annular projection. One elastic arm is respectively installed at both ends of the mounting support. A locking arm is connected between the other ends of the two elastic arms. The mounting support and the locking arm are opposite in position. Both elastic arms are inclined towards the end cover. A height difference is formed between the locking arm and the mounting support, and the locking arm is close to the end cover side, while the mounting support is close to the bottom cover side.
[0010] In some embodiments, a fixed arm is arranged at the middle of the mounting support towards the end cover direction. The end cover is provided with a fixed slot for the fixed arm to insert into.
[0011] In some embodiments, a U-shaped locking bracket is arranged at the middle of the locking arm. A circle of external teeth is arranged on the outer wall of the outer shell body. Internal teeth meshing with the external teeth are arranged on the locking bracket. When the external teeth and the internal teeth are in a meshing state, the end of the unlocking arm is located inside the locking bracket.
[0012] In some embodiments, the first operating mechanism includes a rotating cam, a first roller, and a first cage. At least one set of first locking areas is provided between the outer wall of the rotating cam and the inner wall of the housing. A first abutting section is provided on the outer wall of the rotating cam within the first locking area. First abutting surfaces that contact the corresponding first rollers are respectively provided on both sides of the first abutting section, and a second abutting surface that contacts the first cage is provided in the middle. The first cage is located between the second abutting surface and the inner wall of the housing at the corresponding position, and first rollers are respectively provided on both sides of the first cage; the distances between the two first abutting surfaces within the same first abutting section and the inner wall of the housing gradually decrease in a direction away from the second abutting surface.
[0013] In some embodiments, positioning bosses are respectively provided on both sides of the end cover at the positions corresponding to the first locking areas; shafts that penetrate through the end cover and the chassis are respectively provided on both end faces of the rotating table. The handle bracket is fixedly connected to the shaft of the rotating table that penetrates through the end cover, and the power output shaft is rotatably connected to the shaft of the rotating table that penetrates through the chassis.
[0014] In some embodiments, an outer ring and a rotating seat are provided in the area of the installation shell below the bottom cover. The outer ring is fixedly arranged in the installation shell, and the rotating seat is arranged on the side close to the bottom cover. The rotating seat is fixedly assembled with the power output shaft.
[0015] In some embodiments, the second operating mechanism includes a rotating disk for fixedly assembling the power output shaft, a second roller, and a second cage; at least one set of second locking areas is provided between the outer wall of the rotating disk and the inner wall of the outer ring. A second abutting section is provided on the outer wall of the rotating disk within the second locking area. Third abutting surfaces that contact the corresponding second rollers are respectively provided on both sides of the second abutting section, and a fourth abutting surface that contacts the second cage is provided in the middle. The second cage is located between the fourth abutting surface and the inner wall of the outer ring at the corresponding position, and second rollers are respectively provided on both sides of the second cage; the distances between the two third abutting surfaces within the same second abutting section and the inner wall of the outer ring gradually decrease in a direction away from the fourth abutting surface.
[0016] In some embodiments, rotation clearance elimination components are respectively provided on both sides of the second locking area of the chassis. The rotation clearance elimination components include a rubber wedge block and a positioning block. The positioning block is arranged on the side of the chassis facing the bottom cover, the rubber wedge block is arranged between the positioning block and the rotating disk, and installation grooves for inserting the rubber wedge block are respectively provided on the positioning block and the rotating disk.
[0017] In summary, the present application includes at least one of the following beneficial technical effects: With the combined use of the handle bracket, the elastic locking member, the clutch connection housing, the first operating mechanism, and the second operating mechanism, the poor locking reliability of the product and the poor consistency of the rotation clearance and reduction amount each time the handle is operated are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic cross-sectional structure diagram of a manual height adjustment pump for an automobile seat according to an embodiment of the present application.
[0019] Figure 2 It is an exploded structure diagram of a manual height adjustment pump for an automobile seat according to an embodiment of the present application.
[0020] Figure 3 It is a schematic structure diagram of an elastic locking member in a manual height adjustment pump for an automobile seat according to an embodiment of the present application.
[0021] Figure 4 It is a schematic structure diagram of an installation shell in a manual height adjustment pump for an automobile seat according to an embodiment of the present application.
[0022] Figure 5 It is a schematic structure diagram of a manual height adjustment pump for an automobile seat according to an embodiment of the present application, used to show the cooperation structure of the first operating mechanism, the elastic locking member and the clutch connection shell.
[0023] Figure 6 It is a schematic structure diagram of a manual height adjustment pump for an automobile seat according to an embodiment of the present application without including a handle bracket.
[0024] Figure 7 It is a schematic structure diagram of a rotating table in a manual height adjustment pump for an automobile seat according to an embodiment of the present application.
[0025] Figure 8 It is a schematic cross-sectional structure diagram of a manual height adjustment pump for an automobile seat according to an embodiment of the present application, used to show the first operating mechanism.
[0026] Figure 9 It is a schematic structure diagram of a manual height adjustment pump for an automobile seat according to an embodiment of the present application, used to show the second operating mechanism.
[0027] Figure 10 It is a schematic cross-sectional structure diagram of a manual height adjustment pump for an automobile seat according to an embodiment of the present application, used to show the second operating mechanism.
[0028] Figure 11 It is a schematic structure diagram of a rotating disk in a manual height adjustment pump for an automobile seat according to an embodiment of the present application.
[0029] Explanation of reference numerals: 1, mounting shell; 2, handle bracket; 3, bottom cover; 4, end cover; 5, outer shell; 6, chassis; 7, mounting support; 8, elastic support arm; 9, locking support arm; 10, fixed support arm; 11, fixed groove; 12, locking bracket; 13, outer teeth; 14, inner teeth; 15, unlocking support arm; 16, outer ring; 17, inner ring; 18, spacer block; 19, elastic member; 20, toggle arm; 21, arc groove; 22, rotation Cam; 23, first roller; 24, first retaining frame; 25, first contact section; 26, first contact surface; 27, second contact surface; 28, positioning boss; 29, outer ring; 30, rotating seat; 31, rotating disk; 32, second roller; 33, second retaining frame; 34, second contact section; 35, third contact surface; 36, fourth contact surface; 37, rubber wedge; 38, positioning block; 39, mounting groove; 40, power output shaft. DETAILED DESCRIPTION
[0030] The following is combined with Figures 1 to 11 This application is described in further detail.
[0031] The present application embodiment discloses a manual height adjustment pump for a car seat, referring to Figure 1 , 2 A power input end and a power output end are arranged on the mounting shell 1, the handle bracket 2 is rotatably arranged on the power input end of the mounting shell 1, the bottom cover 3 is installed on the power output end of the mounting shell 1, the power output shaft 40 is passed through the bottom cover 3, and a clutch connection shell is arranged in the space between the end cover 4 at the power input end and the bottom cover 3 in the mounting shell 1, the clutch connection shell includes an annular outer shell 5 and a chassis 6, and the chassis 6 is arranged on the side of the outer shell 5 away from the end cover 4.
[0032] In this embodiment, a first auxiliary cavity is formed between the outer shell 5 and the inner wall of the mounting shell 1, and an elastic locking member that cooperates with the outer shell 5 to lock is installed in the first auxiliary cavity. Figure 3 The elastic locking member includes a mounting support 7, two elastic arms 8, and a locking arm 9. The mounting support 7, the two elastic arms 8, and the locking arm 9 form a structure whose projection is annular. An elastic arm 8 is respectively installed at both ends of the mounting support 7. The two elastic arms 8 are inclined toward the end cover 4, and a locking arm 9 is connected between the other ends of the two elastic arms 8. The mounting support 7 and the locking arm 9 are relative to each other, and a height difference is formed between the locking arm 9 and the mounting support 7, and the locking arm 9 is close to the end cover 4 side, and the mounting support 7 is close to the bottom cover 3 side.
[0033] In order to prevent the elastic locking member from rotating with the mounting bracket 7, a fixed arm 10 is provided in the middle of the mounting bracket 7 toward the end cover 4. Figure 4, the end cover 4 is provided with a fixing groove 11 for inserting the fixing arm 10. In order to realize the relative locking of the elastic locking member to the clutch connecting shell, refer to Figure 5 , a U-shaped locking bracket 12 is provided in the middle of the locking arm 9, an outer tooth 13 is provided in a circle on the outer wall of the outer housing 5, and an inner tooth 14 meshing with the outer tooth 13 is provided on the locking bracket 12; in order to realize that when the handle bracket 2 rotates, it can act on the elastic locking member to disengage the relative locking state between the inner tooth 14 of the locking bracket 12 and the outer tooth 13 of the outer housing 5, an unlocking arm 15 is provided on the handle bracket 2, which penetrates through the end cover 4 and extends into the first auxiliary cavity. When the outer tooth 13 and the inner tooth 14 are in a meshing state, the end of the unlocking arm 15 is located inside the locking bracket 12, and when the unlocking arm 15 cooperates with the elastic locking member to unlock, the handle bracket 2 is rotated, and then the unlocking arm 15 is driven to rotate accordingly. When the unlocking arm 15 disengages from the locking bracket 12 during the rotation process, it will press the locking bracket 12 in a direction away from the handle bracket 2, thereby causing the inner tooth 14 and the outer tooth 13 to disengage.
[0034] During the entire movement of the rotation of the handle bracket 2, an elastic reset structure and a corresponding cooperation structure for driving the unlocking arm 15 to rotate can be designed. Refer to Figure 6 , an outer ring 16 is provided at the edge of the end cover 4, an inner ring 17 is provided on the end cover 4, and at least one set of spring installation areas is provided between the inner ring 17 and the outer ring 16. In this embodiment, three sets of spring installation areas are taken as an example for illustration. Two partition blocks 18 are arranged at intervals on the outer wall of the inner ring 17 of the spring installation area. There is a gap between the partition block 18 and the inner wall of the outer ring 16. Usually, in order to save space layout, the partition blocks 18 of adjacent spring installation areas can be shared; among them, an elastic member 19 is installed in the spring installation area between the two partition blocks 18. In this embodiment, the elastic member 19 is a spring; on the handle bracket 2, there are toggle arms 20 with the same quantity and position corresponding to the partition blocks 18. The toggle arms 20 are arranged at intervals between the partition blocks 18 and the inner wall of the outer ring 16. When the toggle arms 20 rotate with the handle bracket 2, they will compress the spring. At the same time, the spring can also assist the handle bracket 2 to reset; in addition, since the unlocking arm 15 is designed to penetrate through the end cover 4, and the unlocking arm 15 needs a certain rotation space during the rotation process, an arc-shaped groove 21 can be provided at the position corresponding to the unlocking arm 15 on the end cover 4. The arc-shaped groove 21 is located in the area between the inner ring 17 and the outer ring 16. The unlocking arm 15 is installed on the toggle arm 20 at the position of the arc-shaped groove 21 and penetrates through the arc-shaped groove 21.
[0035] In this embodiment, a second auxiliary cavity is formed among the outer housing 5, the chassis 6 and the end cover 4, and a first operating mechanism is arranged in the second auxiliary cavity; the first operating mechanism includes a rotating cam 22, a first roller 23 and a first cage 24. At least one set of first locking areas is arranged between the outer wall of the rotating cam 22 and the inner wall of the outer housing 5. In this embodiment, three sets of first locking areas are taken as an example for illustration. Refer to Figure 7 , 8 , on the outer wall of the rotating cam 22 in the first locking area, a first abutting section 25 is arranged. On both sides of the first abutting section 25, first abutting surfaces 26 that contact the first roller 23 at corresponding positions are arranged, and in the middle, a second abutting surface 27 that contacts the first cage 24 is arranged. The first abutting surfaces 26 of adjacent first abutting sections 25 are adjacent to each other and form a V-shaped shape therebetween. The first cage 24 is located between the second abutting surface 27 and the inner wall of the outer housing 5 at the corresponding position, and first rollers 23 are arranged on both sides of the first cage 24; in order to ensure the locking function during the rotation process, the distance between the two first abutting surfaces 26 in the same first abutting section 25 and the inner wall of the outer housing 5 gradually decreases in the direction away from the second abutting surface 27.
[0036] Among them, positioning bosses 28 are respectively arranged on both sides of the first locking area on the end cover 4. Usually, the positioning bosses 28 of adjacent first locking areas can be shared; on both end faces of the rotating table, shafts passing through the end cover 4 and the chassis 6 are arranged. The handle bracket 2 is fixedly connected to the shaft of the rotating table passing through the end cover 4, and the power output shaft 40 is rotatably connected to the shaft of the rotating table passing through the chassis 6.
[0037] In this embodiment, an outer ring 29 and a rotating seat 30 are arranged in the area below the bottom cover 3 in the mounting shell 1. The outer ring 29 is fixedly arranged in the mounting shell 1, and the rotating seat 30 is arranged on the side close to the bottom cover 3. The rotating seat 30 is fixedly assembled with the power output shaft 40. The rotating seat 30 and the power output shaft 40 can be fixedly installed by means of key connection. A third auxiliary cavity is arranged between the chassis 6 and the bottom cover 3, and a second operating mechanism connected to the power output shaft 40 is arranged in the third auxiliary cavity; refer to Figure 9 , 10 , the second operating mechanism includes a rotating disk 31 for fixedly assembling the power output shaft 40, a second roller 32, and a second cage 33. Generally, a hole for the power output shaft 40 to pass through is arranged in the middle of the rotating seat 30. After the power output shaft 40 passes through the hole of the rotating seat 30, it is assembled with the rotating disk 31 by key connection; at least one set of second locking areas is arranged between the outer wall of the rotating disk 31 and the inner wall of the outer ring 29. In this embodiment, three sets are taken as an example for illustration. Refer to Figure 11, on the outer wall of the rotating disk 31 in the second locking area, a second abutting section 34 is provided. On both sides of the second abutting section 34, third abutting surfaces 35 in contact with the second rollers 32 at corresponding positions are provided, and in the middle, a fourth abutting surface 36 in contact with the second cage 33 is provided. The second cage 33 is located between the fourth abutting surface 36 and the inner wall of the outer ring 29 at the corresponding position. Second rollers 32 are provided on both sides of the second cage 33; the distance between the two third abutting surfaces 35 in the same second abutting section 34 and the inner wall of the outer ring 29 gradually decreases in the direction away from the fourth abutting surface 36.
[0038] On both sides of the second locking area of the chassis 6, rotation clearance elimination components are respectively provided. Usually, the rotation clearance elimination components between adjacent second locking areas can be shared. The rotation clearance elimination components include rubber wedges 37 and positioning blocks 38. The positioning blocks 38 are provided on the side of the chassis 6 facing the bottom cover 3. The rubber wedges 37 are provided between the positioning blocks 38 and the rotating disk 31, and mounting grooves 39 for inserting the rubber wedges 37 are respectively provided on the positioning blocks 38 and the rotating disk 31. Under the design of the rotation clearance elimination components, the rotation clearances in each second locking area are relatively consistent, which also makes the rotation clearance and reduction amount of each operation handle relatively consistent.
[0039] When the manual height adjustment pump for an automobile seat disclosed in the embodiment of the present application is working, the handle bracket 2 rotates under the action of an external force. During the rotation of the handle bracket 2, the compression spring is compressed, and at the same time, the unlocking arm 15 rotates accordingly, pressing the locking bracket 12 to unlock it relative to the outer shell 5 of the clutch connection housing. After unlocking, since the handle bracket 2 and the rotating cam 22 are fixedly connected by the shaft passing through the end cover 4, the rotating cam 22 will rotate synchronously. During the rotation process, the first abutting surface 26 of the rotating cam 22 also rotates accordingly, so that the distance between the first abutting surface 26 and the inner wall of the outer shell 5 is reduced, and the first roller 23 at the corresponding position no longer follows the rotation, forming a lock. After locking, the clutch connection housing rotates synchronously. During the rotation of the outer shell 5 of the clutch connection housing, the positioning block 38 rotates synchronously, and then the positioning block 38 presses the roller 32 in front of its rotation direction, so that the roller 32 moves to the side with a larger distance between the corresponding second abutting surface 27 and the outer ring 29. Due to the relationship of the rotation direction, the roller 32 on the other side of the same second cage 33 as the roller also moves to the side with a larger distance between the corresponding second abutting surface 27 and the outer ring 29, so that the locking relationship is no longer formed here, and the rotating disk 31 can rotate synchronously, and finally the power output shaft 40 also follows the rotation; among them, all the rollers in this embodiment can be rollers or balls, etc.
[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A manual height adjustment pump for a car seat, comprising a mounting shell (1), a handle bracket (2), a bottom cover (3), and a power output shaft (40), wherein the mounting shell (1) is provided with a power input end and a power output end, the handle bracket (2) is rotatably arranged on the power input end of the mounting shell (1), the bottom cover (3) is installed on the power output end of the mounting shell (1), and the power output shaft (40) is penetrated through the bottom cover (3), characterized in that: A clutch connection shell is arranged in a space between an end cover (4) and a bottom cover (3) at a power input end in the mounting shell (1), and the clutch connection shell comprises an annular outer shell (5) and a chassis (6), wherein the chassis (6) is arranged on a side of the outer shell (5) away from the end cover (4); a first auxiliary cavity is formed between the outer shell (5) and the inner wall of the mounting shell (1), and an elastic locking piece that cooperates with the outer shell (5) for locking is installed in the first auxiliary cavity; an unlocking arm (15) that penetrates the end cover (4) and extends into the first auxiliary cavity is arranged on the handle bracket (2), and the unlocking arm (15) cooperates with the elastic locking piece for unlocking; a second auxiliary cavity is formed between the outer shell (5), the chassis (6) and the end cover (4), and a first operating mechanism is arranged in the second auxiliary cavity; a third auxiliary cavity is arranged between the chassis (6) and the bottom cover (3), and a second operating mechanism that is connected to the power output shaft (40) is arranged in the third auxiliary cavity.
2. A manual height adjustment pump for a car seat according to claim 1, characterized in that: An outer ring (16) is provided at the edge of the end cover (4); an inner ring (17) is provided on the end cover (4); at least one set of spring installation areas is provided between the inner ring (17) and the outer ring (16); two spacer blocks (18) are provided at intervals on the outer wall of the inner ring (17) in the spring installation area; a space is provided between the spacer blocks (18) and the inner wall of the outer ring (16); an elastic member (19) is installed in the spring installation area between the two spacer blocks (18); and a spring member (19) is provided on the handle bracket (2) toward the spring installation area. The number and position of the toggle arms (20) correspond to the spacer blocks (18), and the toggle arms (20) are arranged one by one at the interval between the spacer blocks (18) and the inner wall of the outer ring (16); an arc groove (21) is arranged at a position on the end cover (4) corresponding to the unlocking support arm (15), and the arc groove (21) is located in the area between the inner ring (17) and the outer ring (16); the unlocking support arm (15) is installed on the toggle arm (20) at the position of the arc groove (21) and penetrates the arc groove (21).
3. A manual height adjustment pump for a car seat according to claim 1, characterized in that: The elastic locking member comprises a mounting support (7), two elastic arms (8), and a locking arm (9); the mounting support (7), the two elastic arms (8), and the locking arm (9) form a structure projected in a ring shape; one elastic arm (8) is mounted on each of the two ends of the mounting support (7); the other ends of the two elastic arms (8) are connected to the locking arm (9); the mounting support (7) and the locking arm (9) are positioned relative to each other; the two elastic arms (8) are inclined toward the end cover (4); a height difference is formed between the locking arm (9) and the mounting support (7); the locking arm (9) is close to one side of the end cover (4), and the mounting support (7) is close to one side of the bottom cover (3).
4. A manual height adjustment pump for a car seat according to claim 3, characterized in that: A fixed support arm (10) is arranged in the middle of the mounting support (7) towards the end cover (4), and the end cover (4) is provided with a fixed groove (11) for the fixed support arm (10) to be inserted into.
5. A manual height adjustment pump for a car seat according to claim 3, characterized in that: A U-shaped locking bracket (12) is provided in the middle of the locking arm (9); a circle of external teeth (13) is provided on the outer wall of the outer shell (5); internal teeth (14) meshing with the external teeth (13) are provided on the locking bracket (12); when the external teeth (13) and the internal teeth (14) are in a mutually meshing state, the end of the unlocking arm (15) is located inside the locking bracket (12).
6. A manual height adjustment pump for a car seat according to claim 1, characterized in that: The first operating mechanism comprises a rotating cam (22), a first roller (23) and a first retaining frame (24); at least one group of first locking areas is arranged between the outer wall of the rotating cam (22) and the inner wall of the outer shell (5); a first contact section (25) is arranged on the outer wall of the rotating cam (22) in the first locking area; first contact surfaces (26) in contact with the first roller (23) at a corresponding position are arranged on both sides of the first contact section (25); a second contact surface (27) in contact with the first retaining frame (24) is arranged in the middle; the first retaining frame (24) is located between the second contact surface (27) and the inner wall of the outer shell (5) at a corresponding position; and first rollers (23) are arranged on both sides of the first retaining frame (24); the distance between the two first contact surfaces (26) in the same first contact section (25) and the inner wall of the outer shell (5) gradually decreases in a direction away from the second contact surface (27).
7. A manual height adjustment pump for a car seat according to claim 6, characterized in that: Positioning bosses (28) are respectively provided on both sides of the first locking area on the end cover (4); shafts penetrating the end cover (4) and the chassis (6) are respectively provided on both end surfaces of the rotating platform; the handle bracket (2) is fixedly connected to the shaft of the rotating platform penetrating the end cover (4); and the power output shaft (40) is rotatably connected to the shaft of the rotating platform penetrating the chassis (6).
8. A manual height adjustment pump for a car seat according to claim 1, characterized in that: An outer ring (29) and a rotating seat (30) are arranged in an area located below the bottom cover (3) in the mounting shell (1); the outer ring (29) is fixedly arranged in the mounting shell (1); the rotating seat (30) is arranged on a side close to the bottom cover (3); and the rotating seat (30) is fixedly assembled with the power output shaft (40).
9. A manual height adjustment pump for a car seat according to claim 8, characterized in that: The second operating mechanism comprises a rotating disk (31), a second roller (32), and a second retaining frame (33) for fixing the power output shaft (40); at least one set of second locking areas is arranged between the outer wall of the rotating disk (31) and the inner wall of the outer ring (29); a second contact section (34) is arranged on the outer wall of the rotating disk (31) in the second locking area; third contact surfaces (35) in contact with the second roller (32) at a corresponding position are arranged on both sides of the second contact section (34); a fourth contact surface (36) in contact with the second retaining frame (33) is arranged in the middle; the second retaining frame (33) is located between the fourth contact surface (36) and the inner wall of the outer ring (29) at a corresponding position; and second rollers (32) are arranged on both sides of the second retaining frame (33); the spacing between the two third contact surfaces (35) and the inner wall of the outer ring (29) in the same second contact section (34) gradually decreases in a direction away from the fourth contact surface (36).
10. A manual height adjustment pump for a car seat according to claim 9, characterized in that: The chassis (6) is provided with a rotational clearance elimination component on both sides of the second locking area, the rotational clearance elimination component comprising a rubber wedge (37) and a positioning block (38), the positioning block (38) being provided on a side of the chassis (6) facing the bottom cover (3), the rubber wedge (37) being provided between the positioning block (38) and the rotating disk (31), and the positioning block (38) and the rotating disk (31) being provided with mounting grooves (39) for inserting the rubber wedge (37) respectively.