Chair backrest inclination control mechanism
By designing a simplified chair backrest tilt control mechanism, the adjustability of the backrest is achieved using gears and drivers, the problems of single structure of traditional chairs and complex mechanisms are solved, and the chair backrest adjustment effect with reliable functions and low failure rate is achieved.
Patent Information
- Application Number
- CN202421124193.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The traditional chair has a single structure, lacks adjustment function, and the conventional chair backrest tilt mechanism is complex, and the use of spring control force leads to increased volume, reduced cost and aesthetics.
A chair backrest tilt control mechanism is designed, adopting a simplified adjustment structure, including a backrest connection assembly, an inclined lock seat, a slide chute, a backrest force adjustment elastic strip group and an inclined pull wire module, and the backrest adjustable backrest is achieved through gears and drivers. sex.
It realizes flexible adjustment of the chair backrest, simplifies the structure, reduces the failure rate, improves functional reliability, and avoids increase in volume and cost.
Smart Images
Figure CN222486730U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chairs, in particular to a chair backrest tilt control mechanism. Background Art
[0002] The traditional chair has a relatively simple structure, and only has a simple supporting function, but no adjustment function and thus cannot meet the needs of users.
[0003] In order to overcome this defect, chairs with adjustable height or backrest tilt have appeared on the market. However, the conventional chair backrest tilting mechanism is relatively complicated, and springs are often used as the backrest force control mechanism, which makes the entire chair structure larger, resulting in certain defects in cost and aesthetics.
[0004] For this reason, it is urgent to provide a chair back tilt control mechanism to overcome the above-mentioned defects. Utility Model Content
[0005] The main purpose of the utility model is to provide a chair back tilt control mechanism, which has a new adjustment structure, a simplified and novel structure, reliable functions, a low failure rate and the like.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] A chair backrest tilt control mechanism comprises: a backrest connection assembly, and a handle seat assembly movably connected to the backrest connection assembly, wherein the inner side walls of the tilt lock seats on the left and right sides of the backrest connection assembly are formed with slide grooves facing each other, and a backrest force adjustment elastic strip group is clamped and fixed between the two tilt lock seats; one of the tilt lock seats is equipped with a force adjustment handle for adjusting the gear position of the backrest force adjustment elastic strip group;
[0008] The connecting arms on the left and right sides of the handle seat assembly are pivotally connected to the tilt lock seat through a left / right driver; the handle seat assembly is equipped with: a tilt pull wire module with a gear portion formed on one end and a tilt gear driver at the other end connected to a starter, which are gear-engaged with each other, and a gear is gear-engaged with the gear portion, and the gear portion drives the left / right tilt lock and the slide groove to lock / release; the driver passes through the connecting arm on which the force adjustment handle is installed and is connected to the gear adjustment drive module, driving the driver and the left / right tilt lock to release the slide groove in linkage therewith, and the force adjustment handle is linked with the backrest connecting seat of the backrest connecting assembly to drive the backrest force adjustment elastic strip group to rotate to the corresponding force gear.
[0009] Preferably, the backrest force adjustment elastic strip group includes: two spring strips parallel to each other and horizontally arranged between the two tilt lock seats, and a center gear sleeve sleeved on one of the spring strips; and one of the spring strips sleeved with the center gear sleeve is connected to the force adjustment handle.
[0010] Preferably, the backrest force adjustment elastic strip group is fixed by a spring strip seat, and a first clamping groove for clamping the center gear sleeve is formed inward on one fixed side of the spring strip seat, and an abutting groove for abutting another spring strip is formed on the side surface of the surface.
[0011] Preferably, the tilt wire module comprises: a tilt lock gear position driver connected to the driver, a tilt wire having one end plugged into the tilt lock gear position driver and the other end fixedly connected to a gear drive rack having the gear part formed on its outer surface.
[0012] Preferably, a plurality of grooves are formed on the outer side surface of the tilt lock gear position driver, and the driver drives the tilt lock gear position driver to rotate, and the corresponding grooves are engaged with the slots of the limit seat formed on the inner side wall of a connecting arm.
[0013] Preferably, a first elastic member and a rack plunger are sequentially sleeved in the gear-driven rack, a clamping installation groove is concavely formed on the rack plunger, and a clamping installation portion at one end of the inclined pull wire is clamped in the clamping installation groove.
[0014] Preferably, the snap-fit mounting portion is limited by a retaining spring after being snapped into the snap-fit mounting groove, and a second elastic member is provided on the outer sleeve of the snap-fit mounting portion; the second elastic member is provided between the opposite ends of the gear driving rack and the sleeve of the inclined pull wire.
[0015] Preferably, the gear adjustment drive module includes: two gears that are mutually geared at one end and arranged in an "eight" shape, and a connecting rod connecting the other ends of the two gears; the connecting rod is engaged with the left / right tilt lock and drives the left / right tilt lock to loosen / lock the slide groove.
[0016] Preferably, both ends of each of the connecting rods are designed to be ball head structures, and each of the ball head structures is correspondingly engaged and fixed to the gear and the left / right tilt lock.
[0017] Preferably, one end of the left / right driver is connected to the backrest connecting seat, and the other end is connected to the connecting arm so as to be relatively rotatable around the connecting portion, and a pivot column which is snapped into the tilt lock seat is convexly provided on the left / right driver.
[0018] The utility model provides a chair backrest tilt control mechanism, which drives the driver to adjust the gear part of the tilt wire module to move and then drives the gear to rotate. When the gear drives the left / right tilt lock to move on the super-center point of the slide slot, the left / right tilt lock releases the slide slot, and the backrest connection seat of the backrest connection assembly swings around the left / right driver, and the force adjustment handle drives the backrest force adjustment elastic strip group to adjust to the corresponding gear position. When the left / right tilt is driven to move toward the corresponding slide slot direction, the left / right tilt locks the slide slot, and the backrest connection assembly is positioned. The utility model uses a new adjustment structure, which is simplified and novel in structure, and has the characteristics of reliable function and low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The utility model is a structural schematic diagram of an embodiment of a chair backrest tilt control mechanism.
[0020] Figure 2 for Figure 1 1. Schematic diagram of structural decomposition.
[0021] Figure 3 It is a partial structural exploded schematic diagram of an embodiment of a backrest connection assembly of this embodiment.
[0022] Figure 4 This is a schematic diagram of the structural decomposition of an embodiment of the inclined wire drawing module of this embodiment.
[0023] Description of the figure numbers in the manual:
[0024] 1-backrest connection assembly, 11-backrest connection seat, 12-tilt lock seat, 121-slide groove, 122-force adjustment handle, 13-backrest force adjustment elastic strip group, 131-spring strip, 132-center gear sleeve, 133-spring strip seat, 14-left drive, 15-right drive, 2-handle cushion assembly, 20-connecting arm, 21-starter, 22-tilt cable module, 221-driver, 222-gear drive rack, a1-gear part, b1-first elastic member, b2-rack plunger, b21-clamping installation groove, b3-circlip, 223-tilt cable, c-second elastic member, 23-gear adjustment drive module, 231-gear, 232-connecting rod, 24-left tilt lock, 25-right tilt lock. DETAILED DESCRIPTION
[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0026] It should be noted that when an element is referred to as being “connected to” or “disposed on” another element, it can be directly on the other element or indirectly on the other element.
[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.
[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0030] See also Figures 1 to 4 A chair backrest tilt control mechanism of this embodiment includes: a backrest connection assembly 1, and a handle seat cushion assembly 2 movably and adjustably connected to the backrest connection assembly 1.
[0031] In a preferred embodiment, the backrest connection assembly 1 comprises: a backrest connection seat 11, a tilt lock seat 12 installed on both sides of the backrest connection seat 11, a backrest force adjustment elastic strip group 13 installed between the two tilt lock seats 12, and a left / right driver 14 / 15 connected to the backrest connection seat 11 at one end and connected to the handle seat assembly 2 at the other end so as to be relatively rotatable around the connection portion, and the left / right driver 14 / 15 is convexly provided with a pivot column that is snapped into the tilt lock seat 12, so that the backrest connection seat 11 and the left / right driver 14 / 15 can rotate around the pivot column. The inner side wall of the tilt lock seat 12 is formed with a slide groove 121 facing each other, and the backrest force adjustment elastic strip group 13 is snap-fitted and fixed between the two tilt lock seats 12, and one of the tilt lock seats 12 is provided with a force adjustment handle 122 for adjusting the gear position of the backrest force adjustment elastic strip group 13. Specifically, the backrest force adjustment elastic strip group 13 includes: two spring strips 131 that are parallel to each other and horizontally arranged between the two tilt lock seats 12, and a center gear shaft sleeve 132 sleeved on one of the spring strips 131; one of the spring strips 131 sleeved with the center gear shaft sleeve 132 is connected to the force adjustment handle 122, and the backrest force adjustment elastic strip group 13 is fixed by a spring strip seat 133, and a first clamping groove for clamping the center gear shaft sleeve 132 is formed on a fixed surface of the spring strip seat 133, and a contact groove for abutting the other spring strip 131 is formed on the side surface of the surface. More specifically, the spring strip seat 133 is fixedly connected to the handle seat assembly 2.
[0032] In a preferred embodiment, the handle seat assembly 2 is equipped with: a starter 21, a tilt wire module 22, a gear adjustment drive module 23 and a left / right tilt lock 24 / 25. Specifically, the connecting arms 20 on the left and right sides of the handle seat assembly 2 are pivotally connected to the tilt lock seat 12 through the left / right driver 14 / 15. The tilt wire module 22 includes: a tilt lock gear driver 221 connected to the driver 21, a tilt wire 223 with one end plugged into the tilt lock gear driver 221 and the other end fixedly connected to a gear drive rack 222 with the gear part a1 formed on the outer surface, and a plurality of grooves are formed on the outer surface of the tilt lock gear driver 221, and the driver 21 drives the tilt lock gear driver 221 to rotate, and the corresponding grooves are plugged into the card slot of the limit seat formed on the inner side wall of a connecting arm 20, so as to realize the gear selection. More specifically, the gear drive rack 222 is sleeved with a first elastic member b1 and a rack plunger b2 in sequence, and the rack plunger b2 is concavely formed with a snap-fit installation groove b21, and the snap-fit installation portion at one end of the tilting cable 223 is snapped into the snap-fit installation groove b21, and the snap-fit installation portion is limited by a clamping spring b3 after being snapped into the snap-fit installation groove b21, and the snap-fit installation portion is provided with a second elastic member c on the outer sleeve; the second elastic member c is arranged between the gear drive rack 222 and the opposite end of the shaft sleeve of the tilting cable 223. The gear adjustment drive module 23 includes: two gears 231 with one end mutually geared and arranged in an "eight" shape, and a connecting rod 232 connecting the other ends of the two gears 231; the connecting rod 232 is snapped with the left / right tilt lock 24 / 25, and drives the left / right tilt lock 24 / 25 to release / lock the slide slot 121. Specifically, both ends of each connecting rod 232 are designed as ball head structures, and each ball head structure is correspondingly clamped and fixed to the gear 231 and the left / right tilt lock 24 / 25. More specifically, one gear 231 is geared with the gear part a1, and when the gear part a1 drives one gear 231 to rotate, one end of the two gears 231 connected to the connecting rod 232 moves in the "eight" opening / closing manner, and the two connecting rods 232 are linked to drive the left / right tilt lock 24 / 25 clamped at both ends to slide and release / lock the slide slot 121 at the same time. The driver 21 passes through the connecting arm 20 equipped with the force adjustment handle and is connected to the gear adjustment driving module 23, and the driver 21 and the left / right tilt lock 24 / 25 are driven to release the slide slot 121 in linkage with the backrest connecting seat 11, and the backrest force adjustment elastic strip group 13 is driven to rotate to the corresponding force gear. The first elastic member b1 and the second elastic member c are springs.
[0033] The working principle of the utility model is as follows: when unlocking, the starter 21 is rotated in one direction, which drives the driver 221 to rotate to the corresponding gear position, and the gear part a1 on the tilt wire module 22 is pulled by the tilt wire 223 to move, driving one gear 231 to rotate, and the other gear 231 also rotates, and the two gears 231 drive the two connecting rods 232 to move toward each other, and each connecting rod 232 correspondingly drives the left tilt lock 24 and the right tilt lock 25 to release and engage with the corresponding slide groove 121, so as to exert force on the backrest connecting seat 11. Apply force to adjust it to the corresponding tilted position, the tilt lock seat 12 is linked with it, and the force adjustment handle 122 thereon drives the spring bar 131 to rotate and then drives the center gear sleeve 132 to rotate to the corresponding gear position; then adjust the gear part a1 to drive the two gears 231 to drive the two connecting rods 232 to move toward the slide groove 121, the left tilt lock 24 and the right tilt lock 25 are engaged with the corresponding slide groove 121 and lock the slide groove 121, thereby positioning the backrest connecting seat 11, so that this product can achieve the purpose of backrest tilt adjustment.
[0034] From the above description, it can be seen that this product uses a new type of adjustment structure, has a simplified and novel structure, and has the characteristics of reliable function and low failure rate.
[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A chair back tilt control mechanism, comprising: The backrest connection assembly, and the handle seat cushion assembly movably and adjustably connected to the backrest connection assembly, are characterized in that: Slide grooves are formed on the inner side walls of the tilt lock seats on the left and right sides of the backrest connection assembly, and a backrest force adjustment elastic strip group is clamped and fixed between the two tilt lock seats; one of the tilt lock seats is equipped with a force adjustment handle for adjusting the gear position of the backrest force adjustment elastic strip group; The connecting arms on the left and right sides of the handle seat assembly are pivotally connected to the tilt lock seat through a left / right driver; the handle seat assembly is equipped with: a tilt pull wire module with a gear portion formed on one end and a tilt gear driver at the other end connected to a starter, which are gear-engaged with each other, and a gear is gear-engaged with the gear portion, and the gear portion drives the left / right tilt lock and the slide groove to lock / release; the driver passes through the connecting arm on which the force adjustment handle is installed and is connected to the gear adjustment drive module, driving the driver and the left / right tilt lock to release the slide groove in linkage therewith, and the force adjustment handle is linked with the backrest connecting seat of the backrest connecting assembly to drive the backrest force adjustment elastic strip group to rotate to the corresponding force gear.
2. The chair back tilt control mechanism according to claim 1, characterized in that: The backrest force adjustment elastic strip group includes: two spring strips parallel to each other and horizontally arranged between the two tilt lock seats, and a central gear shaft sleeve sleeved on one of the spring strips; and one of the spring strips sleeved with the central gear shaft sleeve is connected to the force adjustment handle.
3. The chair back tilt control mechanism according to claim 2, characterized in that: The backrest force adjustment elastic strip group is fixed by a spring strip seat, and a first clamping groove for clamping the central gear sleeve is formed on one fixed side of the spring strip seat, and a contact groove for abutting against another spring strip is formed on the side surface of the surface.
4. The chair backrest tilt control mechanism according to any one of claims 1 to 3, characterized in that: The tilt wire module comprises: a tilt lock gear position driver connected to the driver, a tilt wire having one end plugged into the tilt lock gear position driver and the other end fixedly connected to a gear driving rack having the gear part formed on its outer surface.
5. The chair back tilt control mechanism according to claim 4, characterized in that: A plurality of grooves are formed on the outer side surface of the tilt lock gear position driver, and the driver drives the tilt lock gear position driver to rotate, and the corresponding grooves are engaged with the slots of the limit seat formed on the inner side wall of a connecting arm.
6. The chair back tilt control mechanism according to claim 4, characterized in that: The gear driving rack is sleeved with a first elastic member and a rack plunger in sequence, the rack plunger is concavely formed with a clamping installation groove, and the clamping installation portion at one end of the inclined pull wire is clamped in the clamping installation groove.
7. The chair back tilt control mechanism according to claim 6, wherein: The snap-fit installation part is limited by a snap spring after being snapped into the snap-fit installation groove, and a second elastic member is disposed on the outer sleeve of the snap-fit installation part; the second elastic member is disposed between the opposite ends of the gear driving rack and the shaft sleeve of the inclined pull wire.
8. The chair backrest tilt control mechanism according to any one of claims 1 to 3, characterized in that: The gear adjustment drive module includes: two gears with one end mutually geared and arranged in an "eight" shape, and a connecting rod connecting the other ends of the two gears; the connecting rod is engaged with the left / right tilt lock and drives the left / right tilt lock to loosen / lock the slide groove.
9. The chair back tilt control mechanism according to claim 8, characterized in that: Both ends of each connecting rod are designed to be ball head structures, and each ball head structure is correspondingly clamped and fixed to the gear and the left / right tilt lock.
10. The chair back tilt control mechanism according to claim 1, wherein: One end of the left / right driver is connected to the backrest connecting seat, and the other end is connected to the connecting arm so as to be relatively rotatable around the connecting portion, and a pivoting column which is snapped into the tilting lock seat is convexly provided on the left / right driver.