Gear-type chair bottom plate

Abstract

A gear type chair bottom disc is characterized by a disc bottom shell, a back seat, a cushion seat, a swing arm, a disc seat frame, a first fixed shaft, a second fixed shaft, a third fixed shaft, a first spring assembly, a second spring assembly, a third spring assembly, a driving rod, a transmission shaft, a gear and a gear part, the third fixed shaft passes through a front spring seat, a second long hole, a gear shaft hole and a third long hole, the two ends of the third fixed shaft are fixed with the third fixed shaft hole and are hinged with the swing arm, a second guide rail and a second track groove are matched, a third guide rail and a third track groove are matched, a limiting plate is matched with a third sliding part, the gear is fixed on the transmission shaft, the gear and a sector gear are engaged, the other end of the swing arm is hinged with a front hinged frame plate, the driving rod is rotated to realize gear conversion, the gear drives the sector gear of the gear part, the gear part controls the second sliding part and the third sliding part, the gear is rotated in the clockwise direction or the counterclockwise direction to realize reciprocal conversion of the gear, the structure is simple and the operation is convenient.

Description

Technical Field

[0001] This invention relates to a seat chassis. Background Technology

[0002] Currently, existing technology, specifically Chinese patent 202323274288.5, in the field of self-weighted seat chassis technology, proposes a self-weighted seat chassis including a base, a backrest connecting plate, a synchronous connecting shaft, and a spring connecting shaft. The spring connecting shaft is connected to the base and includes a first self-weighting spring group and a second self-weighting spring group. One end of the first self-weighting spring group is connected to the spring connecting shaft, and the other end is fixedly connected to the synchronous connecting shaft. One end of the second self-weighting spring group is fixedly connected to the synchronous connecting shaft, and the other end is connected to a self-weighting adjustment mechanism for adjusting the support force of the backrest connecting plate. The problem is that the adjustment mechanism has a complex structure, and its operation and connection relationships are complex. Summary of the Invention

[0003] The purpose of this invention is to provide a gear-type chair chassis that features a simple structure and convenient gear shifting.

[0004] This invention is implemented as follows: a shiftable chair base, characterized by: a base shell, a backrest, a cushion, a swing arm, a base frame, a first fixed axis, a second fixed axis, a third fixed axis, a first spring assembly, a second spring assembly, a third spring assembly, a drive rod, a transmission shaft, gears, and a shifting component. The bottom shell has an upper opening and a rear opening, and is provided with a shell rotation hole; The rear seat includes a slotted seat, a hinge plate, an upper axle head hole, and a lower axle head hole. The base includes a front hinged frame plate and a rear hinged frame plate; The plate base includes a second fixed shaft hole, a sliding groove, a third fixed shaft hole, a frame rotation hole, and a frame plate, with shaft holes provided on the frame plate; The first spring assembly includes a first spring, a front spring seat, and a rear spring seat. The second spring assembly includes a second spring, a second spring seat, and a second sliding member. The second sliding member includes a second elongated hole, a second longitudinal groove on one side, and a second guide rail at one end of the second longitudinal groove. The third spring assembly includes a third spring, a third spring seat, and a third sliding member. The third sliding member includes a third elongated hole, a third longitudinal groove on one side, and a third guide rail at one end of the third longitudinal groove. The stop component includes a stop block, a sector gear, a stop shaft hole, a second track groove, an extension plate, a third track groove, and a limiting plate; The disc base frame is embedded and fixed inside the disc bottom shell. The hinge plate is inserted into the disc bottom shell. The disc base frame is located between the two hinge plates. The second fixed shaft is engaged with the second fixed shaft hole, and the shaft head is engaged with the lower shaft head hole. The rear hinge frame plate, rear spring seat, second spring seat, third spring seat, and rear hinge frame plate are arranged in sequence and are rotatably engaged with the first fixed shaft. The first fixed shaft is engaged with the sliding groove, and the shaft head is engaged with the upper shaft head hole. The front spring seat, second sliding member, stop block, and third sliding member are arranged in sequence. The third fixed shaft passes through the front spring seat, the second elongated hole, the stop shaft hole, and the third elongated hole. Both ends of the third fixed shaft are fixed with the third fixed shaft hole, and both ends are hinged to the swing arm. The second guide rail is engaged with the second track groove, the third guide rail is engaged with the third track groove, and the limiting plate is engaged with the third sliding member. The drive rod is rotatably engaged with the shell rotation hole and the frame rotation hole. The gear is fixed on the transmission shaft. One end of the transmission shaft is fixed with the drive rod, and the other end is rotatably engaged with the shaft hole on the frame plate. The gear meshes with the sector gear. The other end of the swing arm is hinged to the front hinged frame plate; the rotation of the drive rod realizes gear shifting.

[0005] The special feature of the gear-type chair chassis is that the limiting plate cooperates with the suspended end of the third sliding member, and the first spring, the second spring and the third spring work simultaneously to form the third gear. The limiting plate leaves the suspended end of the third sliding member, the second guide rail leaves the second track groove, and the first spring and the third spring work together to form the second position; When the third guide rail leaves the third track groove, the first spring activates to the first stop. Gear shifting is achieved by rotating the drive lever clockwise or counterclockwise.

[0006] The aforementioned gear-type chair chassis is characterized in that: first bushings are provided on both sides of the rear spring seat of the first spring assembly. It also includes a sliding rotating sleeve, on which an annular baffle is provided; One end of the sliding rotating sleeve is inserted into the shaft hole of the rear hinged frame plate, and the annular baffle cooperates with the wall plate of the rear hinged frame plate and the disc base frame. The other end of the sliding rotating sleeve cooperates with the sliding groove. One sliding rotating sleeve, the third spring seat, the second spring seat, the first bushing and another sliding rotating sleeve are in contact.

[0007] The aforementioned gear-type chair chassis is characterized in that it further includes a third fixed shaft sleeve, which is provided with a third flange. The end of the swing arm is provided with a countersunk hole, an arm shaft hole, a connecting hole, and a head countersunk hole; The third fixed shaft sleeve is inserted into the third fixed shaft hole, the third flange is inserted into the countersunk hole, the third fixed shaft passes through the third fixed shaft sleeve and is inserted into the arm shaft hole, and the screw passes through the connecting hole and is screwed into the third fixed shaft.

[0008] The aforementioned gear-type chair chassis is characterized in that it further includes a second fixed shaft sleeve, on which a second flange is provided; The second bushing is inserted into the second fixed shaft hole, the second flange is in contact with the outer surface of the side wall plate of the disc base, and the second fixed shaft passes through the second bushing.

[0009] The distinctive feature of the aforementioned gear-type chair chassis is that a gear plate is provided on a hinge plate of the back seat, and a gear hole is provided on the gear plate. It also includes a positioning bead, which is located on one side wall of the disc base frame, and the stop hole cooperates with the positioning bead.

[0010] The aforementioned gear-type chair chassis is characterized in that it further includes a protective component, which has an upper opening, a lower opening, and a front opening, and includes a rear extension hole on the rear wall panel, a fixed seat plate, and a protective plate. The grooved seat of the back seat extends out from the rear extension hole, the protective plate is inserted into the grooved seat, and the fixing plate is fixed to the grooved seat; the rear end of the bottom shell is inserted into the protective component, and the back seat and the protective component swing together.

[0011] This invention discloses a gear-type chair chassis. Due to its structure, the gear drives the sector gear of the gear-positioning component, and the gear-positioning component controls the second and third sliding components. The gear rotates clockwise or counterclockwise to realize the reciprocating switching of gears. The structure is simple and the operation is convenient. Attached Figure Description

[0012] Figure 1 This is a top view of the present invention.

[0013] Figure 2 yes Figure 1 A-A view.

[0014] Figure 3 yes Figure 1 B-B view.

[0015] Figure 4 yes Figure 1 C-C view.

[0016] Figure 5 yes Figure 1 D-D view.

[0017] Figure 6 yes Figure 4 E-E view.

[0018] Figure 7 yes Figure 5 F-F view.

[0019] Figure 8 This is a perspective view of the gear shift assembly of the present invention.

[0020] Figure 9 This is one of the exploded perspective views of the gear shift assembly of the present invention.

[0021] Figure 10 This is the second exploded perspective view of the gear shift assembly of the present invention.

[0022] Figure 11 This is one of the exploded perspective views of the present invention.

[0023] Figure 12 This is the second exploded perspective view of the present invention.

[0024] Figure 13 This is the third exploded perspective view of the present invention.

[0025] Figure 14 This is the fourth exploded perspective view of the present invention.

[0026] Figure 15 This is the fifth exploded perspective view of the present invention. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a shiftable chair base includes a base shell 1, a backrest 2, a cushion 3, a swing arm 4, a base frame 5, a first fixed shaft 61, a second fixed shaft 62, a third fixed shaft 63, a first spring assembly 7, a second spring assembly 8, a third spring assembly 9, a drive rod 10, a transmission shaft 11, a gear 12, and a shifting element 13. The bottom shell 1 has an upper opening and a rear opening and is provided with a shell rotation hole 1A; The rear seat 2 includes a slotted seat 21, a hinge plate 22, an upper shaft head hole 221, and a lower shaft head hole 222. The pad 3 includes a front hinged frame plate 31 and a rear hinged frame plate 32; The tray frame 5 includes a second fixed shaft hole 51, a sliding groove 52, a third fixed shaft hole 53, a frame rotation hole 54, and a frame plate 55, on which a shaft hole is provided; The first spring assembly 7 includes a first spring (not labeled), a front spring seat 71, and a rear spring seat 72. The second spring assembly 8 includes a second spring (not labeled), a second spring seat 81, and a second slider 82, such as Figure 9 , Figure 10 As shown, the second sliding member 82 includes a second elongated hole 821, a second longitudinal groove 822 provided on one side, and a second guide rail 823 provided at one end of the second longitudinal groove 822; The third spring assembly 9 includes a third spring (not labeled), a third spring seat 91, and a third slider 92, such as Figure 9 , Figure 10 As shown, the third sliding member 92 includes a third elongated hole 921, a third longitudinal groove 922 on one side, and a third guide rail 923 at one end of the third longitudinal groove 922. The stop component 13 includes a stop block 131, a sector gear 132, a stop shaft hole 133, a second track groove 134, an extension plate 135, a third track groove 136, and a limiting plate 137. The intersection of the stop block 131 and the extension plate 135 is rounded, and the third track groove 136 is located on the stop block 131 and the extension plate 135. The disk base frame 5 is embedded and fixed inside the disk bottom shell 1. The hinge plate 22 is inserted into the disk bottom shell 1. The disk base frame 5 is located between the two hinge plates 22. The second fixed shaft 62 is engaged with the second fixed shaft hole 51, and the shaft head of the second fixed shaft 62 is engaged with the lower shaft head hole 222. The rear hinge frame plate 32, the rear spring seat 72, the second spring seat 81, the third spring seat 91, and the rear hinge frame plate 32 are arranged in sequence and rotate with the first fixed shaft 61. The first fixed shaft 61 is engaged with the sliding groove 52, and the shaft head of the first fixed shaft 61 is engaged with the upper shaft head hole 221. The front spring seat 71, the second sliding member 82, the stop block 131, and the third sliding member 92 are arranged in sequence. The third fixed shaft 63 passes through the front spring seat 71, the second elongated hole 821, the stop shaft hole 133, and the third fixed shaft 92. Three elongated holes 921; the two ends of the third fixed shaft 63 are fixed to the third fixed shaft hole 53, and the two ends of the third fixed shaft 63 are hinged to the swing arm 4; the second guide rail 823 cooperates with the second track groove 134, the third guide rail 923 cooperates with the third track groove 136, and the limiting plate 137 cooperates with the third sliding member 92; the stop block 131 rotates in the second longitudinal groove 822 and the third longitudinal groove 922, and the sector gear 132 rotates between the second sliding member 82 and the third sliding member 92; the drive rod 10 is rotatably engaged with the housing rotation hole 1A and the frame rotation hole 54, and the gear 12 is fixed on the transmission shaft 11. One end of the transmission shaft 11 is fixed to the drive rod 10, and the other end is rotatably engaged with the shaft hole on the frame plate 55. The gear 12 and the sector gear 132 mesh. The other end of the swing arm 4 is hinged to the front hinged frame plate 31; the rotation of the drive rod 10 realizes gear shifting.

[0030] As a further improvement to the present invention: such as Figure 1 , Figure 4 , Figure 8 As shown, the limiting plate 137 and the suspended end of the third sliding member 92 are in the third position; when the back seat 22 rotates counterclockwise in the third position, the first spring, the second spring and the third spring all function. Based on the third gear, rotating the drive rod 10 clockwise and the transmission shaft 11 drives the gear 12 to rotate, and the sector gear 132 rotates counterclockwise. The limiting plate 137 moves away from the third sliding member 92; the second track groove 134 and the second guide rail 823 of the stop block 131 separate, and the third guide rail 923 engages with the third track groove 136 of the extension plate 135. When the back seat 22 rotates counterclockwise, the first spring and the third spring work simultaneously; this is the second gear. Based on the second gear, when the third guide rail 923 leaves the third track groove 136, the first spring activates to achieve the first gear; Gear shifting is achieved by rotating the drive lever 10 clockwise or counterclockwise.

[0031] As a further improvement of the present invention: the rear spring seat 72 of the first spring assembly 7 is provided with first bushings (not marked) on both sides. like Figure 3 , Figure 13 As shown, it also includes a sliding rotating sleeve 14, on which an annular baffle 141 is provided; One end of the sliding rotating sleeve 14 is inserted into the shaft hole of the rear hinge plate 32, and the annular baffle 141 cooperates with the wall plate of the rear hinge plate 32 and the disc base 5. The other end of the sliding rotating sleeve 14 cooperates with the sliding groove 52. One sliding rotating sleeve 14, the third spring seat 91, the second spring seat 81, the first bushing, and the other sliding rotating sleeve 14 are in contact. This design can prevent the rear spring seat 72, the second spring seat 81, and the third spring seat 91 from moving axially.

[0032] As a further improvement to the present invention: such as Figure 7 As shown, it also includes a third fixed shaft sleeve 15, which is provided with a third flange 151; The end of the swing arm 4 is provided with a countersunk hole 41, an arm shaft hole 42, a connecting hole 43 and a head countersunk hole 44; The third fixed shaft sleeve 15 is inserted into the third fixed shaft hole 53, the third flange 151 is inserted into the countersunk hole 41, the third fixed shaft 63 passes through the third fixed shaft sleeve 15 and is inserted into the arm shaft hole 42, and the screw passes through the connecting hole 43 and is screwed into the third fixed shaft 63.

[0033] As a further improvement to the present invention: such as Figure 6As shown, it also includes a second fixed shaft sleeve 16, on which a second flange 161 is provided; The second fixed shaft sleeve 16 is inserted into the second fixed shaft hole 51, the second flange 161 is in contact with the outer surface of the side wall plate of the disc base 5 and the hinge plate 22, the second fixed shaft 62 passes through the second shaft sleeve, and the shaft head of the second fixed shaft 62 is in contact with the lower shaft head hole 222.

[0034] As a further improvement to the present invention: such as Figure 14 As shown, a stop plate 23 is provided on a hinge plate 22 of the back seat 2, and a stop hole 231 is provided on the stop plate 23; It also includes a positioning bead (not shown in the figure), which is located on one side wall of the disc base 5, and the stop hole 231 cooperates with the positioning bead.

[0035] As a further improvement to the present invention: such as Figure 12 As shown, it also includes a protective member 17, which has an upper opening, a lower opening, and a front opening, and includes a rear protrusion hole 171 provided on the rear wall panel, a fixed base plate 172, and a protective plate 173. The grooved seat 21 of the back seat 2 extends out from the rear extension hole 171, the protective plate 173 is inserted into the grooved seat 21, and the fixed seat plate 172 is fixed to the grooved seat 21; the rear end of the bottom shell 1 is inserted into the protective member 17, and the back seat 2 and the protective member 17 swing together.

[0036] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A type of chair base with adjustable positions, characterized in that: The components include: chassis base, rear seat, pad, swing arm, chassis frame, first fixed shaft, second fixed shaft, third fixed shaft, first spring assembly, second spring assembly, third spring assembly, drive rod, transmission shaft, gears, and gear shifting components. The bottom shell has an upper opening and a rear opening, and is provided with a shell rotation hole; The rear seat includes a slotted seat, a hinge plate, an upper axle head hole, and a lower axle head hole. The base includes a front hinged frame plate and a rear hinged frame plate; The plate base includes a second fixed shaft hole, a sliding groove, a third fixed shaft hole, a frame rotation hole, and a frame plate, with shaft holes provided on the frame plate; The first spring assembly includes a first spring, a front spring seat, and a rear spring seat. The second spring assembly includes a second spring, a second spring seat, and a second sliding member. The second sliding member includes a second elongated hole, a second longitudinal groove on one side, and a second guide rail at one end of the second longitudinal groove. The third spring assembly includes a third spring, a third spring seat, and a third sliding member. The third sliding member includes a third elongated hole, a third longitudinal groove on one side, and a third guide rail at one end of the third longitudinal groove. The stop component includes a stop block, a sector gear, a stop shaft hole, a second track groove, an extension plate, a third track groove, and a limiting plate; The disc base frame is embedded and fixed inside the disc bottom shell. The hinge plate is inserted into the disc bottom shell. The disc base frame is located between the two hinge plates. The second fixed shaft is engaged with the second fixed shaft hole, and the shaft head is engaged with the lower shaft head hole. The rear hinge frame plate, rear spring seat, second spring seat, third spring seat, and rear hinge frame plate are arranged in sequence and are rotatably engaged with the first fixed shaft. The first fixed shaft is engaged with the sliding groove, and the shaft head is engaged with the upper shaft head hole. The front spring seat, second sliding member, stop block, and third sliding member are arranged in sequence. The third fixed shaft passes through the front spring seat, the second elongated hole, the stop shaft hole, and the third elongated hole. Both ends of the third fixed shaft are fixed with the third fixed shaft hole, and both ends are hinged to the swing arm. The second guide rail is engaged with the second track groove, the third guide rail is engaged with the third track groove, and the limiting plate is engaged with the third sliding member. The drive rod is rotatably engaged with the shell rotation hole and the frame rotation hole. The gear is fixed on the transmission shaft. One end of the transmission shaft is fixed with the drive rod, and the other end is rotatably engaged with the shaft hole on the frame plate. The gear meshes with the sector gear. The other end of the swing arm is hinged to the front hinged frame plate; the rotation of the drive rod realizes gear shifting.

2. The shift-type chair chassis according to claim 1, characterized in that: The limiting plate engages with the suspended end of the third sliding member, and the first spring, second spring, and third spring work together to form the third position; The limiting plate leaves the suspended end of the third sliding member, the second guide rail leaves the second track groove, and the first spring and the third spring work together to form the second position; When the third guide rail leaves the third track groove, the first spring activates to the first stop. Gear shifting is achieved by rotating the drive lever clockwise or counterclockwise.

3. The shift-type chair base according to claim 1, characterized in that: The first spring assembly has first bushings on both sides of the rear spring seat. It also includes a sliding rotating sleeve, on which an annular baffle is provided; One end of the sliding rotating sleeve is inserted into the shaft hole of the rear hinged frame plate, and the annular baffle cooperates with the wall plate of the rear hinged frame plate and the disc base frame. The other end of the sliding rotating sleeve cooperates with the sliding groove. One sliding rotating sleeve, the third spring seat, the second spring seat, the first bushing and another sliding rotating sleeve are in contact.

4. A shift-type chair base according to claim 1, characterized in that: It also includes a third fixed shaft sleeve, which is provided with a third flange; The end of the swing arm is provided with a countersunk hole, an arm shaft hole, a connecting hole, and a head countersunk hole; The third fixed shaft sleeve is inserted into the third fixed shaft hole, the third flange is inserted into the countersunk hole, the third fixed shaft passes through the third fixed shaft sleeve and is inserted into the arm shaft hole, and the screw passes through the connecting hole and is screwed into the third fixed shaft.

5. A shift-type chair chassis according to claim 1, characterized in that: It also includes a second fixed shaft sleeve, on which a second flange is provided; The second fixed shaft sleeve is inserted into the second fixed shaft hole, the second flange is attached to the outer surface of the side wall plate of the disc base, and the second fixed shaft passes through the second shaft sleeve.

6. A shift-type chair base according to claim 1, characterized in that: A stop plate is provided on a hinge plate of the rear seat, and a stop hole is provided on the stop plate; It also includes a positioning bead, which is located on one side wall of the disc base frame, and the stop hole cooperates with the positioning bead.

7. A shift-type chair base according to claim 1, 2, 3, 4, 5 or 6, characterized in that: It also includes protective components, which have an upper opening, a lower opening, and a front opening, including a rear protrusion hole on the rear wall panel, a fixed base plate, and a protective plate. The grooved seat of the back seat extends out from the rear extension hole, the protective plate is inserted into the grooved seat, and the fixing plate is fixed to the grooved seat; the rear end of the bottom shell is inserted into the protective component, and the back seat and the protective component swing together.

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