Adjusting handle for seat

Abstract

The utility model relates to an adjusting handle for a seat, which is characterized in that a safe rotating structure is arranged between a first sleeve rod and a handle part, so that when a user rotates the handle part to adjust the seat, the first sleeve rod can be driven to rotate through the handle part. Meanwhile, the transmission rod is fixedly installed at the lower end of the first sleeve rod and rotates along with the first sleeve rod. According to the structure of the scheme, the handle part can still be rotated under the condition that a user continues to apply force, but under the action of the safe rotating structure, the transmission rod does not receive force applied by the user any more; the inner structure of the adjusting handle is effectively protected, slipping caused by abrasion of the connecting position of the transmission rod of the adjusting handle and the seat base is effectively prevented, and the handle part is effectively prevented from being broken due to excessive rotation. The adjusting handle of the structure is long in service life, convenient to adjust, simple in structure and good in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of seat accessories, in particular to an adjustment handle for a seat. Background Art

[0002] A general seat includes a base, on which a handle structure for implementing an adjustment function is provided. The handle structure is used to adjust the overall tilt and recline strength of the seat to provide the user with a more ergonomic and comfortable sitting posture.

[0003] When the user uses the existing adjustment handle to adjust the overall reclining force of the seat, the user generally rotates the adjustment handle while leaning back on the seat to adjust the seat. For example, the Chinese utility model patent with publication number CN216166385U and patent name: base handle quick installation structure realizes a base handle quick installation structure with scientific and simple structure, split design, quick installation, simple and fast assembly, small required packaging volume, reduced packaging materials, reduced packaging costs and transportation and storage costs, convenient maintenance and replacement, and effective extension of product service life.

[0004] This type of adjustment handle is easy to assemble and repair. However, when the user uses the handle for adjustment, because the handle can be rotated continuously to drive the transmission rod to rotate, when the seat reclining force is adjusted to the maximum or minimum, the adjustment handle cannot determine whether it is finally adjusted to the correct position. Therefore, when the user leans back on the seat, after the user adjusts the seat back to the maximum tilt, the user can still rotate the adjustment handle while continuing to apply force. In this way, under the interaction of the user's back reclining force on the seat and the user's continuous rotation force of the adjustment handle, the internal adjustment structure of the handle is easily damaged by friction, and the handle is easily broken by the user's rotation. At the same time, the connection between the transmission rod of the handle and the base is easily damaged and slips off. The adjustment handle of this structure has a short service life and is prone to failure in adjusting the overall reclining force of the seat.

[0005] Therefore, how to overcome the above-mentioned defects has become an important issue to be solved urgently by those skilled in the art. Utility Model Content

[0006] The utility model overcomes the shortcomings of the above-mentioned technology and provides an adjustment handle for a seat.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A seat adjustment handle comprises a handle portion with a hollow interior and a transmission rod installed in the lower end of the handle portion, wherein a first set of hollow interior rods is installed in the handle portion, and the transmission rod is fixedly installed in the lower end of the first set of rods so as to rotate with the first set of rods, and a safety rotation structure is provided between the first set of rods and the handle portion so as to drive the first set of rods to rotate when the user rotates the handle portion, and under the action of the safety rotation structure, the handle portion rotates relative to the first set of rods after the transmission rod is rotated into place.

[0009] Furthermore, a second hollow rod is installed inside the handle portion, and the second rod is fixedly mounted outside the first rod to facilitate the rotation of the first rod. The handle portion is fixedly mounted outside the second rod to facilitate the rotation of the second rod. The safety rotation structure includes a plurality of racks circumferentially arranged on the outer side wall of the upper end of the first rod, and a plurality of tooth grooves circumferentially arranged on the inner side wall of the second rod and meshing with the racks.

[0010] Furthermore, the second rod comprises an internally hollow second rod portion and an upper cover clamped on the upper end of the second rod portion, a first clamping groove is provided on the outer wall of the upper cover, a clamping strip for clamping into the first clamping groove is provided on the inner wall of the second rod portion, and the tooth groove is arranged on the inner wall of the second rod portion.

[0011] Furthermore, a plurality of latching teeth are circumferentially arranged on the outer side wall of the lower end of the rod portion of the second sleeve rod, and a plurality of second latching grooves for the latching teeth to be latched into are circumferentially arranged on the inner side wall of the handle portion.

[0012] Furthermore, the safety rotation structure includes a plurality of racks circumferentially arranged on the outer side wall of the upper end of the first sleeve rod, and a plurality of tooth grooves circumferentially arranged on the inner side wall of the handle portion and meshing with the racks.

[0013] Furthermore, a hexagonal groove is formed at the lower end of the first sleeve rod, the cross section of the transmission rod is hexagonal, and the upper end of the transmission rod is inserted into the hexagonal groove.

[0014] Furthermore, an anti-slip ring and an anti-slip groove are provided on the outer side wall of the handle portion, and the anti-slip ring is provided with anti-slip stripes.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In this case, a safety rotation structure is arranged between the first set of rods and the handle part, so that when the user rotates the handle part to adjust the seat, the first set of rods can be driven to rotate by the handle part. At the same time, the transmission rod is fixedly installed at the lower end of the first set of rods and rotates with the first set of rods. In this way, under the action of the safety rotation structure, when the user rotates the handle part to drive the first set of rods to rotate, the first set of rods drives the transmission rod to rotate, thereby adjusting the seat back. When the transmission rod is rotated to the right position, under the action of the safety rotation structure, the handle part rotates relative to the first set of rods. Since the transmission rod is fixedly installed at the lower end of the first set of rods, the transmission rod will no longer rotate as the user rotates the handle part. In this case, the user can still rotate the handle part while continuing to apply force, but under the action of the safety rotation structure, the transmission rod will no longer receive the force applied by the user, which effectively protects the internal structure of the adjustment handle, effectively prevents the wear of the connection between the transmission rod of the adjustment handle and the seat base and causes slippage, and effectively prevents the handle part from breaking due to excessive rotation. The adjustment handle of this case has a long service life, is easy to adjust, has a simple structure, and is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an exploded view of the overall structure of this case.

[0018] Figure 2 This is a three-dimensional diagram of this case.

[0019] Figure 3 It is a schematic diagram of the structure of the first set of rods and the second set of rods in this case.

[0020] Figure 4 It is a schematic diagram of the handle and the second set of rods in this case.

[0021] Figure 5 It is a schematic diagram of the first set of rods and transmission rod structure in this case. DETAILED DESCRIPTION

[0022] The following embodiments further describe the features of the present invention and other related features in detail to facilitate understanding by technicians in the same industry:

[0023] like Figures 1 to 5As shown, the present case discloses an adjustment handle for a seat, which is mainly used to adjust the tilting force of the seat as a whole, so as to provide the user with a more ergonomic and comfortable sitting posture. It specifically includes an internally hollow handle portion 1 and a transmission rod 2 installed in the lower end of the handle portion. The handle portion 1 is set as an internal hollow structure, so that other parts can be installed better inside it. An internally hollow first set of rods 3 is installed in the handle portion 1. The first set of rods 3 is set as an internal hollow structure, which is convenient for connecting the transmission rod 2 with the handle portion 1, and is also convenient for installing other parts inside it. The transmission rod 2 is fixedly installed at the lower end of the first set of rods 3 so as to rotate with the first set of rods 3. In specific implementation, the upper end of the transmission rod 2 is fixedly installed at the lower end of the first set of rods 3, so as to achieve connection with the handle portion 1. A safety rotation structure is provided between the first set of rods 3 and the handle portion 1 so that the first set of rods 3 can be driven to rotate when the user rotates the handle portion 1. Under the action of the safety rotation structure, when the transmission rod 2 rotates to the right position, the handle portion 1 rotates relative to the first set of rods 3.

[0024] As described above, in the specific implementation, the present invention sets a safety rotation structure between the first set of rods 3 and the handle part 1, so that when the user rotates the handle part 1 to adjust the seat, the first set of rods 3 can be driven to rotate by the handle part 1. At the same time, the transmission rod 2 is fixedly mounted at the lower end of the first set of rods 3 and rotates with the first set of rods 3. In this way, under the action of the safety rotation structure, when the user rotates the handle part 1 to drive the first set of rods 3 to rotate, the first set of rods 3 drives the transmission rod 2 to rotate, thereby achieving the adjustment of the seat back. When the transmission rod 2 rotates to the right position, under the action of the safety rotation structure, the handle part 1 rotates relative to the first set of rods 3. Since the transmission rod 2 is fixedly mounted at the lower end of the first set of rods 3, the transmission rod 2 will no longer rotate as the user rotates the handle part 1. In this structure of the present invention, the user can still rotate the handle part 1 when continuing to apply force, but under the action of the safety rotation structure, the transmission rod 2 will no longer receive the force applied by the user, which effectively protects the internal structure of the adjustment handle, effectively prevents the connection between the transmission rod 2 of the adjustment handle and the seat base from being worn and slipping, and effectively prevents the handle part 1 from breaking due to excessive rotation. The adjustment handle of this structure in the present case has long service life, is easy to adjust, has a simple structure and is good in practicality.

[0025] like Figure 1-Figure 4As shown, it is the first embodiment of the present invention. Furthermore, a second set of rods 4 with a hollow interior is installed inside the handle portion 1 of the present invention. The second set of rods 4 is sleeved outside the first set of rods 3 to facilitate the rotation of the first set of rods 3. The second set of rods 4 is set as an internal hollow structure to facilitate the installation of other components inside it and to facilitate its better sleeve outside the first set of rods 3. The handle portion 1 is fixedly sleeved outside the second set of rods 4 so that when the user rotates the handle portion 1, the second set of rods 4 is driven to rotate, thereby driving the first set of rods 3 to rotate, and then the transmission rod 2 is driven to rotate through the first set of rods 3, thereby achieving the adjustment of the seat back. In this embodiment, the safety rotation structure of the present invention includes a plurality of racks 31 circumferentially arranged on the outer side wall of the upper end of the first set of rods 3, and a plurality of tooth grooves 41 circumferentially arranged on the inner side wall of the second set of rods 4 that mesh with the racks 31. In specific implementation, the first set of rods 3, the second set of rods 4, and the handle portion 1 of the present invention are all truncated cones with a larger diameter at the top and a smaller diameter at the bottom. The rack 31 described in this case is equidistantly arranged along the circumferential direction of the outer side wall of the upper end of the first set of rods 3, similar to the rack of a gear. The tooth grooves 41 described in this case are equidistantly arranged along the circumferential direction of the inner side wall of the upper end of the second set of rods 4, and the tooth grooves 41 are all arranged in a shape that matches the rack 31, so as to mesh with the rack 31.

[0026] As described above, in this embodiment, when the user rotates the handle 1 to adjust the seat, the handle 1 can drive the second set of rods 4 to rotate, and then the second set of rods 4 drives the first set of rods 3 to rotate. At the same time, the transmission rod 2 is fixedly installed at the lower end of the first set of rods 3 and rotates with the first set of rods 3. In this way, under the action of the safety rotation structure, when the user rotates the handle 1 to adjust the seat back, until the transmission rod 2 rotates to the right position, since the other end of the transmission rod 2 is fixedly connected to the seat base, at this time, the user continues to rotate the handle 1, and needs to apply a greater force than the normal adjustment of the seat back. Under the action of the user applying a greater force than the normal adjustment of the seat back, the rack 31 will be disengaged from the corresponding tooth groove 41 at the beginning and be engaged in the next tooth groove 41. If the user continues to apply force to the handle 1, the rack 31 will continue to be disengaged from the tooth groove 41 at the beginning and be engaged in the next tooth groove 41, and continue to perform this mechanical movement. Due to the continuous mechanical movement and friction between the rack 31 and the tooth groove 42, a "clicking" sound is emitted to remind the user that the handle is adjusted into place. That is to say, at this time, "slipping" occurs between the tooth groove 41 and the rack 31, and the user can stop rotating the handle part 1 based on this to prevent excessive adjustment and damage to the internal structure of the adjustment handle in this case.

[0027] like Figure 1-Figure 4As shown, in order to facilitate the disassembly of the second rod 4, the second rod 4 is configured as a second rod portion 42 with a hollow interior and an upper cover 43 clamped on the upper end of the second rod portion 42. A first clamping groove 431 is provided on the outer wall of the upper cover 43, and a clamping strip 421 for clamping into the first clamping groove 431 is provided on the inner wall of the second rod portion 42. The clamping cooperation between the clamping strip 421 and the first clamping groove 431 sets the second rod 4 into two parts that can be disassembled from top to bottom. At this time, the tooth groove 41 is arranged on the inner wall of the second rod portion 42. In this way, the inspection and maintenance of the interior of the second rod 4 is facilitated. In addition, this split design is small in volume for disassembly and assembly, reduces packaging materials, and reduces packaging costs and transportation and storage costs. In specific implementation, in this case, preferably, four first card slots 431 are equidistantly arranged along the circumferential outer wall of the upper cover 43, and correspondingly, four card strips 421 are equidistantly arranged along the circumferential inner wall of the second rod portion 42, so as to make the connection between the upper end of the second rod portion 42 and the upper cover 43 more stable. Of course, the user can also set a corresponding number of card strips 421 and first card slots 431 according to actual needs while ensuring that the upper end of the second rod portion 42 and the upper cover 43 are stably connected.

[0028] like Figure 1-Figure 4 As shown, in order to stably connect the second set of rods 4 and the handle part 1, so that the user can better drive the second set of rods 4 to rotate when rotating the handle part 1, especially when the transmission rod 2 is rotated to the right position, the user applies a greater force to continue to rotate the handle part 1, so as to prevent the first set of rods 3 from rotating relative to the handle part 1. In this case, a plurality of latching teeth 422 are arranged circumferentially on the outer wall of the lower end of the rod part 42 of the second set of rods, and a plurality of second latching grooves 11 for the latching teeth 422 to be engaged are arranged circumferentially on the inner wall of the handle part 1. The latching teeth 422 are engaged in the second latching grooves 11, so that the rod part 42 of the second set of rods is tightly engaged and limitedly matched with the handle part 1, thereby effectively avoiding the occurrence of the above situation, and preventing the user from idling the handle part 1 and being unable to adjust the seat back.

[0029] like Figure 1-Figure 5As shown, the safety rotation structure includes a plurality of racks 31 circumferentially arranged on the outer side wall of the upper end of the first set of rods 3, and a plurality of tooth grooves 41 circumferentially arranged on the inner side wall of the handle portion 1 and meshing with the racks 31. This is the second embodiment of the present case. In this embodiment, the tooth grooves 41 are directly arranged on the inner side wall of the lower end of the handle portion 1 and are integrally formed with the handle portion 1. The same structural functions and effects as those in this embodiment have been described in the aforementioned first embodiment of the present case and will not be repeated here. It should be noted that in this embodiment, the second set of rods 42 is not included, and the safety rotation structure is directly arranged between the first set of rods 3 and the handle portion 1. When the user rotates the handle portion 1, the first set of rods 3 is directly driven to rotate. In the first embodiment of the present case, the second set of rods 4 is provided so that the handle portion 1 can better drive the first set of rods 3 to rotate, so that the user can more easily rotate the handle portion 1, and it is more convenient for the user to use the handle portion 1 to adjust the seat back. The second set of rods 4 buffers the force applied by the user rotating the handle portion 1 and the force of the transmission rod 2 fixedly connected to the seat base, which is more conducive to extending the service life of the adjustment handle of this case. This structure in the second embodiment of the present case saves parts and components, saves production costs, and makes the disassembly and assembly of the entire adjustment handle more convenient, further reducing the packaging volume, reducing packaging materials, and reducing packaging costs as well as transportation and storage costs.

[0030] like Figure 5 As shown, a hexagonal groove 32 is provided at the lower end of the first set of rods 3, and the cross section of the transmission rod 2 is hexagonal, and the upper end of the transmission rod 2 is inserted into the hexagonal groove 32. In specific implementation, the upper end of the transmission rod 2 is inserted into the hexagonal groove 31 at the lower end of the first set of rods 3, thereby playing a role in the clamping and limiting of the two, so that the transmission rod 2 rotates with the rotation of the first set of rods 3. During installation, the lower end of the transmission rod 2 is fixedly connected to the base of the seat for adjusting the seat back. Preferably, in order to better install and fix the two ends of the transmission rod 2 to the seat base and the first set of rods 3, the cross section of the rod body of the transmission rod 2 is a hexagonal rod. In specific implementation, a concave ring can be provided on the part of the transmission rod 2 to facilitate the installation and fixation between the transmission rod 2 and the seat base. Of course, in addition to the preferred hexagonal groove 31 in this case and the cross-section of the transmission rod 2 is set to a hexagon that matches the hexagonal groove 31, the hexagonal groove 32 at the lower end of the first set of rods 3 can also be set to a triangular groove or a cross groove, and accordingly, the rod body of the transmission rod 2 is set to be compatible with the triangular groove or the cross groove at the lower end of the first set of rods 3, as long as the two ends of the transmission rod 2 can be better installed and fixed to the seat base and the first set of rods 3.

[0031] like Figure 1-Figure 4As shown, an anti-skid ring 12 and an anti-skid groove 13 are provided on the outer wall of the handle portion 1, and an anti-skid stripe 121 is provided on the anti-skid ring 12. The provision of the anti-skid ring 12 in this case makes it easier for the user to hold the handle portion 1 when using the adjustment handle of this case, and it is more convenient and easy to rotate the handle portion 1. The provision of the anti-skid groove 13 makes it easier for the user to hold the handle portion 1 and rotate the fingers against the anti-skid groove 13 when the user holds the handle portion 1 and rotates it, making it easier to use. The provision of the anti-skid stripe 121 on the anti-skid ring 12 further increases the friction between the user's hand and the handle portion 1 when the user holds the handle portion 1 and rotates it, preventing slippage.

[0032] As mentioned above, this case protects an adjustment handle for a seat. All technical solutions that are the same or similar to this case should be considered to fall within the protection scope of this case.

Claims

1. An adjustment handle for a seat, characterized in that: The invention comprises a handle portion (1) with a hollow interior and a transmission rod (2) installed in the lower end of the handle portion; a first set rod (3) with a hollow interior is installed in the handle portion (1); the transmission rod (2) is fixedly installed at the lower end of the first set rod (3) so as to rotate along with the first set rod (3); a safety rotation structure is provided between the first set rod (3) and the handle portion (1) so as to drive the first set rod (3) to rotate when the user rotates the handle portion (1); under the action of the safety rotation structure, when the transmission rod (2) rotates into place, the handle portion (1) rotates relative to the first set rod (3).

2. The seat adjustment handle according to claim 1, characterized in that: A second hollow rod (4) is installed inside the handle portion (1); the second rod (4) is fixedly sleeved outside the first rod (3) so as to drive the first rod (3) to rotate; the handle portion (1) is fixedly sleeved outside the second rod (4) so ​​as to drive the second rod (4) to rotate; the safety rotation structure comprises a plurality of racks (31) circumferentially arranged on the outer side wall of the upper end of the first rod (3) and a plurality of tooth grooves (41) circumferentially arranged on the inner side wall of the second rod (4) and meshing with the racks (31).

3. The seat adjustment handle according to claim 2, characterized in that: The second sleeve rod (4) comprises an internally hollow second sleeve rod portion (42) and an upper cover (43) clamped to the upper end of the second sleeve rod portion (42); a first clamping groove (431) is provided on the outer wall of the upper cover (43); a clamping strip (421) for clamping into the first clamping groove (431) is provided on the inner wall of the second sleeve rod portion (42); and the tooth groove (41) is arranged on the inner wall of the second sleeve rod portion (42).

4. The seat adjustment handle according to claim 3, characterized in that: A plurality of latching teeth (422) are circumferentially arranged on the outer side wall of the lower end of the second sleeve rod portion (42), and a plurality of second latching grooves (11) for the latching teeth (422) to be latched into are circumferentially arranged on the inner side wall of the handle portion (1).

5. The seat adjustment handle according to claim 1, characterized in that: The safety rotation structure comprises a plurality of racks (31) circumferentially arranged on the outer side wall of the upper end of the first sleeve rod (3), and a plurality of tooth grooves (41) circumferentially arranged on the inner side wall of the handle portion (1) and meshing with the racks (31).

6. An adjustment handle for a seat according to any one of claims 1 to 5, characterized in that: The lower end of the first sleeve rod (3) is provided with a hexagonal groove (32), the cross section of the transmission rod (2) is hexagonal, and the upper end of the transmission rod (2) is inserted into the hexagonal groove (32).

7. The seat adjustment handle according to claim 6, characterized in that: An anti-skid ring (12) and an anti-skid groove (13) are provided on the outer side wall of the handle portion (1), and an anti-skid ring (12) is provided with an anti-skid stripe (121).

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