A lumbar support guide control mechanism

Abstract

This utility model discloses a lumbar support guide control mechanism, including a lumbar support assembly, a guide assembly, and a control assembly. The lumbar support assembly includes a base and a lumbar support disposed on the front side of the base. The base has symmetrically connected outwardly extending side extensions along the left-right direction. The guide assembly includes a fixed seat connected to the base and a sliding seat connected to the lumbar support and slidably connected to the fixed seat along the front-back direction. A locking structure is provided between the sliding seat and the fixed seat, which allows the sliding seat to switch between a locked state and an unlocked state. The control assembly includes a control switch located away from the locking structure and movably connected to either side extension. A pull wire connects the control switch to the locking structure. By placing the control switch on either side away from the guide assembly, the user can more conveniently operate the control switch on their left or right side after sitting in the seat, avoiding the problem of pinching fingers and improving the user experience of the seat.

Description

Technical Field

[0001] This utility model relates to the field of seats, and in particular to a lumbar support guide control mechanism. Background Technology

[0002] To improve the support performance of the lumbar support, most existing office chairs or ergonomic chairs are equipped with a guide mechanism for adjusting the position of the lumbar support. The guide mechanism usually also has a control switch to lock or unlock the lumbar support when it is moved into place.

[0003] For example, in the patent for an adaptive lumbar support adjustment component with publication number CN222707873, it includes an adjustment seat,

[0004] The sliding mechanism includes a sliding seat with several first locking parts spaced back and forth. The locking mechanism includes a locking member mounted on an adjusting seat. The locking member has a second locking part for engaging with the first locking parts when the sliding seat slides. The locking member is controlled by a locking handle that is oscillatingly mounted on the adjusting seat. When the user operates the locking handle to swing it up and down, it causes the second locking part to engage or disengage with the first locking part, thereby controlling the position of the lumbar support. However, since the locking handle is inserted into the adjusting seat, when the user sits on the seat, their arm needs to be extended backward to reach the locking handle. In addition to being inconvenient to operate, the user's hand is also easily pinched.

[0005] For example, in the lumbar support adjustment mechanism with announcement number CN219835402, the back of the lumbar support component has a front and rear sliding seat that moves back and forth in a front and rear sliding groove. The rear end of the front and rear sliding seat has an adjustment screw hole, and a screw adjustment component is threaded into the adjustment screw hole. The screw adjustment component is connected to an adjustment knob. Turning the adjustment knob can drive the lumbar support component to move back and forth and stop at the corresponding position. However, the adjustment knob in this mechanism is located at the rear end of the chair back frame. The user can only adjust the position of the lumbar support component before sitting down. When sitting in the seat, it is difficult to reach the adjustment knob at the rear end of the chair back frame. Therefore, this mechanism also has the problem of being difficult to operate and having a poor user experience. Summary of the Invention

[0006] This utility model provides a lumbar support guide control mechanism. By setting the control switch on either side away from the guide mechanism, the user can more conveniently operate the control switch on their left or right side after sitting in the seat, avoiding the problem of pinching hands and improving the user experience of the seat.

[0007] The technical solution of this utility model is implemented as follows:

[0008] A lumbar support guide control mechanism, comprising:

[0009] The lumbar support assembly includes a base and a lumbar support disposed on the front side of the base; the base has symmetrically connected outwardly extending side extensions along the left-right direction;

[0010] A guide assembly is disposed between the base and the lumbar support. The guide assembly includes a fixed seat connected to the base and a sliding seat connected to the lumbar support and slidably connected to the fixed seat in the front-back direction. A locking structure is provided between the sliding seat and the fixed seat to allow the sliding seat to switch between a locked state and an unlocked state.

[0011] The control component includes a control switch located away from the locking structure and movably connected to the extension on either side. A pull wire connects the control switch to the locking structure. An external force is applied to the control switch to control the lumbar support to lock or unlock in the forward and backward direction.

[0012] Preferably, the locking structure includes a locking member rotatably connected to the fixed base and connected to the pull wire. The locking member is connected with locking teeth. The sliding base is provided with multiple position slots spaced apart in the front-back direction. External force controls the switch and links the locking member to rotate, so as to control the locking teeth to disengage or engage with the corresponding position slots, thereby allowing the waist support that slides in front and back to switch between the locked state and the unlocked state.

[0013] Preferably, the control component also includes an elastic element acting on the locking element. When the lumbar support switches from the locked state to the unlocked state, an external force acts on the control switch and tensions the cable, causing the locking teeth to disengage from the corresponding gear slot. At this time, the elastic element deforms and stores the elastic force. When the lumbar support switches from the unlocked state to the locked state, an external force acts on the control switch and loosens the cable. At this time, the elastic element releases the elastic force and causes the locking element to reset in the opposite direction to engage with the corresponding gear slot.

[0014] Preferably, the rotatable connection between the locking element and the fixed base is the rotating end, and the elastic element is a torsion spring located at the rotating end.

[0015] Preferably, an elastic reset element is provided between the fixed seat and the sliding seat. When the lumbar support is in the unlocked state, the elastic reset element can act and make the sliding seat always have a tendency to slide forward; so that the lumbar support can provide elastic support to the waist.

[0016] Preferably, the elastic reset element is a compression spring or gas spring disposed between the fixed seat and the sliding seat.

[0017] Preferably, the fixed seat is a sleeve structure with an open front end, and the sliding seat is slidably connected inside the sleeve structure; a shell-shaped mounting seat is integrally connected to the fixed seat, the interior of the mounting seat is connected to the interior of the sleeve, and the position of the mounting seat corresponds to the position of the stop groove on the sliding seat; the locking element is rotatably connected inside the mounting seat; so that the locking element is not exposed while locking or unlocking.

[0018] Preferably, the control switch is a wrench that is rotatably connected to the corresponding side extension. The connection positions of the pull cable and the wrench, and the rotatable connection positions of the wrench and the side extension are staggered. The user can control the locking or unlocking of the lumbar support simply by turning the wrench.

[0019] Preferably, each side extension extends forward beyond the front end of the base, and the control switch is located at the outer end of one of the side extensions; this position of the control switch is as forward as possible, making it convenient for the user's hand to operate and conforming to operating habits.

[0020] Preferably, the locking structure is a self-locking gas spring located between the fixed seat and the sliding seat. The self-locking gas spring has a self-locking device that is connected to the pull cable. The gas spring with the self-locking device makes the lumbar support always tend to move forward, while eliminating the need for a separate gear mechanism to control the locking and unlocking of the lumbar support.

[0021] The beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0022] Compared to placing the control switch at the guide component, this invention places the control switch at one of the side extensions of the base, and connects the control switch to the locking structure at the guide component position via a pull wire. This allows the user to simply reach their hand to the side of the seat to operate the control switch, locking or unlocking the lumbar support position. The design is ingenious and easy to operate, while also preventing hand pinching when operating the control switch, thus improving the safety and user experience of the seat.

[0023] The elastic reset mechanism provides a continuous forward push to the lumbar support when it is unlocked, preventing insufficient support for the lower back in the unlocked state. Furthermore, the mechanism allows the occupant to adjust the lumbar support position by simply leaning back, rather than moving it all the way back at once. To lock the lumbar support in the desired position, the control switch can be used, making the operation simple and efficient.

[0024] The elastic reset component is a self-locking gas spring. The self-locking gas spring is not only an elastic component that makes the lumbar support elastically support the waist, but it can also be connected to the pull cable through its own self-locking device, so that the lumbar support can be locked or unlocked when the control switch is active. It is ingeniously designed and achieves two goals at once. Attached Figure Description

[0025] Figure 1 A schematic diagram of the lumbar support guide control mechanism installed on the seat;

[0026] Figure 2 A schematic diagram showing the control switch positioned forward when the lumbar support guide control mechanism is installed on the seat;

[0027] Figure 3This is a structural diagram of the lumbar support guide control mechanism;

[0028] Figure 4 Exploded view of the lumbar support guide control mechanism;

[0029] Figure 5 This is a diagram showing the connection structure between the control switch and the side extension.

[0030] Figure 6 This is a half-section view of the middle part of the base;

[0031] Figure 7 A cross-sectional view showing the location of the elastic reset element;

[0032] Figure 8 This is a cross-sectional view of the location of the elastic reset member in Embodiment 2;

[0033] The reference numerals in the attached drawings are as follows: 1-base, 11-side extension, 12-pull wire receiving groove, 111-rotating shaft hole, 112-limiting groove, 2-waist support, 3-fixed seat, 31-sliding seat, 32-locking element, 33-locking tooth, 34-compression spring, 35-mounting seat, 311-gear groove, 4-control switch, 41-rotating part, 42-connecting part, 5-pull wire, 6-self-locking gas spring. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0036] This utility model has multiple embodiments, and the specific implementation methods are as follows:

[0037] Example 1: As Figure 1-7 As shown, this embodiment provides a lumbar support guide control mechanism, including:

[0038] The lumbar support assembly includes a base 1 and a lumbar support 2 disposed on the front side of the base 1; the base 1 has outwardly extending side extensions 11 symmetrically connected in the left-right direction; the base 1 and the two side extensions 11 are generally integrally molded parts.

[0039] A guide assembly is disposed between the base 1 and the lumbar support 2. The guide assembly includes a fixed seat 3 connected to the base 1 and a sliding seat 31 connected to the lumbar support 2 and slidably connected to the fixed seat 3 in the front-to-back direction. To ensure the seat has a simple appearance and compact structure, the fixed seat 3 in this embodiment is a sleeve structure with an open front end, and the sliding seat 31 is slidably connected inside the sleeve structure. A locking structure is provided between the sliding seat 31 and the fixed seat 3 to allow the sliding seat 31 to switch between a locked state and an unlocked state.

[0040] The control assembly includes a control switch 4 located away from the locking structure and movably connected to the extension 11 on either side. The left or right side extension 4 serves as a mounting carrier for the control switch 4. The movable connection includes, but is not limited to, sliding connections and rotational connections. A pull wire 5 connects the control switch 4 to the locking structure. External force activates the control switch 4 to control the lumbar support 2 to lock or unlock in the fore-and-aft direction. The effect of installing this lumbar support guide control mechanism on the seat can be seen by referring to... Figure 1 and Figure 2 Since the control switch 4 is connected to the locking structure by a pull wire 5, and the control switch 4 is located on the side extension 11, when the user operates the control switch 4 to lock or unlock the lumbar support 2, he or she only needs to move his or her hand to the left or right, without having to put his or her hand between the fixed seat 3 and the sliding seat 31, which simplifies the operation and avoids unsafe situations such as pinching hands.

[0041] Furthermore, the locking structure needs to be connectable to the pull wire 5 to facilitate operation of the control switch 4. There are many possible designs and styles. In this embodiment, the locking structure includes a locking member 32 rotatably connected to the fixed base 3 and connected to the pull wire 5. The rotatable connection between the locking member 32 and the fixed base 3 is the rotating end. Locking teeth 33 are connected to the locking member 32. The sliding base 31 has multiple stop slots 311 spaced apart along the front-to-back direction. External force acts on the control switch 4 and rotates the locking member 32 to control the locking teeth 33 to disengage or engage with the corresponding stop slots 311, thereby switching the lumbar support 2, which slides forward and backward, between a locked and unlocked state. Specifically, the control component also includes an elastic element acting on the locking member 32. Considering the space and cost occupied by the elastic element, in this embodiment, the elastic element is a torsion spring (not shown) located at the rotating end. In the locked state, the locking tooth 33 is engaged in one of the gear slots 311. When the lumbar support 2 switches from the locked state to the unlocked state, an external force acts on the control switch 4 and tensions the pull cable 5, causing the locking tooth 33 to disengage from the corresponding gear slot 311. At this time, the elastic element deforms and stores the elastic force, and the sliding seat 3 can slide back and forth to adjust the front and back position of the lumbar support 2. When the lumbar support 2 switches from the unlocked state to the locked state, an external force acts on the control switch 4 and loosens the pull cable 5. At this time, the elastic element releases the elastic force and the locking element 32 resets in the opposite direction to engage in the other gear slot 311, thereby keeping the lumbar support 2 in the adjusted corresponding position.

[0042] Furthermore, when the lumbar support 2 is in the unlocked state, it can easily slide backward to the bottom when the occupant leans back. Therefore, to ensure that the lumbar support 2 can gradually slide backward to the predetermined position, such as... Figure 7 As shown, an elastic reset member is provided between the fixed seat 3 and the sliding seat 31. When the lumbar support 2 is in the unlocked state, the elastic reset member can act and make the sliding seat 31 always have a tendency to slide forward. This allows the lumbar support 2 to provide elastic support to the waist in the unlocked state, thereby creating a supporting elastic force on the lumbar support 2. The user can push the lumbar support 2 backward with their own waist to the predetermined support position. When locking is required, the lumbar support 2 can be locked by controlling the switch 4. In this embodiment, the elastic reset member is a compression spring 34 or a gas spring (not shown) provided between the fixed seat 3 and the sliding seat 31. To ensure the simple appearance of the seat, the compression spring 34 or gas spring in this embodiment is inside the fixed seat 3 with a sleeve structure and is not exposed.

[0043] Furthermore, to maintain the seat's appearance, the locking element 32 also needs to be concealed to avoid affecting the seat's clean look. Specifically, for example... Figure 6As shown, a shell-shaped mounting base 35 is integrally connected to the fixed base 3. The interior of the mounting base 35 is connected to the interior of the sleeve, and the position of the mounting base 35 corresponds to the position of the stop groove 311 on the sliding base 31. The mounting base 35 has a through notch to allow the pull wire 5 to pass through and connect to the locking member 32. The locking member 32 is connected to the interior of the mounting base 35 by a rotating shaft. When the sliding base 32 slides back and forth and the corresponding stop groove 311 enters the interior of the mounting base 35, the locking teeth 33 can engage or disengage from the stop groove 311, so that the locking member 32 is locked or unlocked without being exposed.

[0044] Furthermore, to facilitate operation by the user, the control switch 4 is a wrench rotatably connected to the corresponding side extension 11. Specifically, the outer end of the side extension 11 that cooperates with the control switch 4 has a pivot hole 111, and the inner side of the wrench has a rotating part 41, which is rotatably connected to the pivot hole 111. At the same time, the side extension 11 has a movable clearance groove, and the inner side of the wrench has a connecting part 42 corresponding to the movable clearance groove. The connecting part 42 is connected to one end of the pull cable 5. The movable clearance groove has a through opening so that the pull cable 5 can pass through the movable clearance groove. Since the connection position of the pull cable 5 and the wrench and the rotational connection position of the wrench and the side extension 11 are staggered, the user only needs to rotate the wrench to tighten the pull cable 5 to control the locking or unlocking of the lumbar support 2.

[0045] Furthermore, such as Figure 5 As shown, the movable clearance groove is composed of two interconnected limiting grooves 112. The outline of each limiting groove 112 matches the connecting part 42. There is an elastic part between the two limiting grooves 112. When the waist support 2 is locked, the connecting part 42 is restricted in one of the limiting grooves 112. When the waist support 2 is switched to the unlocked state, the connecting part 42 crosses the elastic part and enters the other limiting groove 112, and remains stable in the limiting groove 112, preventing the locking teeth 33 on the locking member 32 from accidentally getting stuck in the gear position groove 311 due to the loosening of the pull cable 5.

[0046] Furthermore, the pull cord 5 is usually designed to be flexible. If the flexible pull cord 5 is exposed on the seat, it will affect the appearance of the seat. Therefore, in this embodiment, the base 1 is provided with a pull cord receiving groove 12 that extends in a strip shape. The pull cord receiving groove 12 extends continuously from the base 1 to one of the side extensions 11 where the control switch 4 is located, and stops at the opening of the movable clearance groove. The pull cord 5 can be threaded into the pull cord receiving groove 12 and equipped with components such as buckles to prevent the pull cord 5 from accidentally detaching from the base 1 and the corresponding side extension 11.

[0047] Furthermore, to make it more convenient for the operator to operate the control switch 4, each side extension 11 extends forward beyond the front end of the base 1. The control switch 4 is located at the outer end of one of the side extensions 11. In this embodiment, the side extension 11 has a forward-extending arc-shaped structure. The side extension 11 extending forward beyond the base 1 makes the position of the control switch 4 as forward as possible, so that the control switch 4 is closer to the operator's hand, which is convenient for the user to operate and conforms to the operating habits of most people.

[0048] Example 2: As Figure 8 As shown, the difference from the above embodiment is that the locking structure in this embodiment is different. It is not necessary to set multiple stop slots 311 on the sliding seat 31, nor is it necessary to set locking elements 32 on the fixed seat 31. The locking structure is a self-locking gas spring 6 set between the fixed seat 3 and the sliding seat 31. The self-locking gas spring 6 is an existing accessory and is also located in the fixed seat 3 of the sleeve structure. The self-locking gas spring 6 has a self-locking device connected to the pull wire 5. The gas spring with the self-locking device makes the lumbar support always have a forward tendency, providing forward elastic support force for the lumbar support 2. At the same time, it is not necessary to set a separate stop structure to control the locking and unlocking of the lumbar support 2. The design is ingenious and easy to assemble.

[0049] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A lumbar support guide control mechanism, characterized in that, include: The lumbar support assembly includes a base (1) and a lumbar support (2) disposed on the front side of the base (1); the base (1) is symmetrically connected with outwardly extending side extensions (11) in the left-right direction. A guide assembly is provided between the base (1) and the waist support (2). The guide assembly includes a fixed seat (3) connected to the base (1) and a sliding seat (31) connected to the waist support (2) and slidably connected to the fixed seat (3) in the front-back direction. A locking structure is provided between the sliding seat (31) and the fixed seat (3) to allow the sliding seat (31) to switch between a locked state and an unlocked state. The control assembly includes a control switch (4) located away from the locking structure and movably connected to the extension (11) on either side. A pull wire (5) is connected between the control switch (4) and the locking structure. An external force is applied to activate the control switch (4) to control the lumbar support (2) to lock or unlock in the front-back direction.

2. The lumbar support guide control mechanism according to claim 1, characterized in that: The locking structure includes a locking member (32) that is rotatably connected to the fixed base (3) and connected to the pull wire (5). The locking member (32) is connected to a locking tooth (33). The sliding base (31) is provided with multiple position slots (311) spaced apart in the front-back direction. An external force acts to control the switch (4) and link the locking member (32) to rotate, so as to control the locking tooth (33) to disengage or engage with the corresponding position slot (311), thereby allowing the waist support (2) that slides in front and back to switch between the locked state and the unlocked state.

3. The lumbar support guide control mechanism according to claim 2, characterized in that: The control assembly also includes an elastic element acting on the locking element (32). When the lumbar support (2) switches from the locked state to the unlocked state, an external force acts on the control switch (4) and causes the pull cable (5) to be tensioned so that the locking tooth (33) disengages from the corresponding gear slot (311). At this time, the elastic element deforms and stores the elastic force. When the lumbar support (2) switches from the unlocked state to the locked state, an external force acts on the control switch (4) and causes the pull cable (5) to be relaxed. At this time, the elastic element releases the elastic force and causes the locking element (32) to reset in the opposite direction to be engaged in the corresponding gear slot (311).

4. The lumbar support guide control mechanism according to claim 3, characterized in that: The locking element (32) and the fixed base (3) are connected at the rotating end, and the elastic element is a torsion spring set at the rotating end.

5. The lumbar support guide control mechanism according to claim 1, characterized in that: An elastic reset member is provided between the fixed seat (3) and the sliding seat (31). When the waist support (2) is in the unlocked state, the elastic reset member can act and make the sliding seat (31) always have a tendency to slide forward.

6. The lumbar support guide control mechanism according to claim 5, characterized in that: The elastic reset element is a compression spring (34) or a gas spring disposed between the fixed seat (3) and the sliding seat (31).

7. The lumbar support guide control mechanism according to claim 2, characterized in that: The fixed seat (3) is a sleeve structure with an open front end, and the sliding seat (31) is slidably connected inside the sleeve structure; a shell-shaped mounting seat (35) is integrally connected to the fixed seat (3), the interior of the mounting seat (35) is connected to the interior of the sleeve, and the position of the mounting seat (35) corresponds to the position of the stop groove (311) on the sliding seat (31); the locking member (32) is rotatably connected inside the mounting seat (35).

8. The lumbar support guide control mechanism according to claim 1, characterized in that: The control switch (4) is a wrench that is rotatably connected to the corresponding side extension (11). The connection position of the pull cable (5) to the wrench and the rotatable connection position of the wrench to the side extension (11) are staggered.

9. The lumbar support guide control mechanism according to claim 1, characterized in that: Each side extension (11) extends forward beyond the front end of the base (1), and a control switch (4) is located at the outer end of one of the side extensions (11).

10. A lumbar support guide control mechanism according to claim 1, characterized in that: The locking structure is a self-locking gas spring (6) set between the fixed seat (3) and the sliding seat (31), and the self-locking gas spring (6) has a self-locking device connected to the pull wire (5).

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