Dining chair capable of being folded front and back

Abstract

The utility model discloses a front-back folding dining chair which comprises two oppositely arranged side supports and a seat arranged between the two side supports, the side supports have first supporting legs and second supporting legs and have an unfolded state and a folded state, and a locking mechanism and a limiting mechanism are arranged between the first supporting legs and the second supporting legs; the locking mechanism comprises a locking disc and a locking piece, a plurality of locking grooves distributed in the circumferential direction are formed in the locking disc, and the locking piece is provided with a locking position inserted into the locking grooves and an unlocking position separated from the locking grooves. The limiting mechanism comprises a limiting groove formed in one of the first supporting leg and the second supporting leg and a limiting pin arranged on the other one, and in the unfolding state, the limiting pin abuts against the first side wall of the limiting groove so as to limit the unfolding stroke of the first supporting leg and the second supporting leg, and the side wall of the locking groove is prevented from extruding the locking piece. According to the technical scheme, the limiting mechanism bears the load, and the locking mechanism is only used for keeping the current state, so that the unlocking difficulty is effectively reduced, the service life of the product is prolonged, and the use experience is improved.

Description

Technical Field

[0001] This application relates to the field of children's products, and in particular to high chairs that fold in front and back. Background Technology

[0002] A high chair is a chair used to help children eat. It typically consists of a support frame and a seat mounted on the frame. To make it easy to store and carry, most high chairs are foldable.

[0003] For example, Chinese patent document CN105310347A discloses a child seat assembly, comprising: a seat support frame; a rear seat portion and a front seat portion, respectively connected to the seat support frame, wherein the front seat portion is slidable relative to the rear seat portion along a longitudinal axis between an unfolded state and a folded state, the longitudinal axis extending from the front to the rear of the seat assembly, and the front seat portion and the rear seat portion, when in the unfolded state, define a seating surface for accommodating a child; and a weight-sensitive locking mechanism disposed adjacent to the rear seat portion and the front seat portion, wherein the weight-sensitive locking mechanism is activated when a load is placed on the seat assembly to prevent the front seat portion from moving relative to the rear seat portion from the unfolded state to the folded state.

[0004] Similar to the aforementioned literature, in the prior art, the weight and load of the dining chair itself directly affect the locking mechanism. During use, the foldable parts will further increase the load on the locking mechanism under stress. This problem not only reduces the stability and lifespan of the locking mechanism, but also makes it difficult to unlock the locking mechanism, affecting the user experience. Utility Model Content

[0005] To solve the above-mentioned technical problems, this application discloses a dining chair that can be folded back and forth, including two oppositely arranged side supports and a seat disposed between the two side supports. The side supports include a first leg and a second leg pivotally connected by a rotating shaft, and have an unfolded state and a folded state. A locking mechanism and a limiting mechanism are provided between the first leg and the second leg.

[0006] The locking mechanism includes a locking disc disposed on one of the first leg or the second leg and a locking member disposed on the other leg. The locking disc is provided with a plurality of locking grooves arranged circumferentially. The locking member is movably disposed and has a locking position for inserting into the locking groove and a unlocking position for disengaging from the locking groove.

[0007] The limiting mechanism includes a limiting groove disposed on one of the first leg or the second leg and a limiting pin disposed on the other leg. In the unfolded state, the limiting pin abuts against the first sidewall of the limiting groove to limit the unfolding stroke of the first leg and the second leg, and to prevent the sidewall of the locking groove from pressing against the locking member.

[0008] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0009] In one embodiment, the locking mechanism further includes a driving member exposed to the outside. The locking member is strip-shaped with a locking end and a driving end that cooperates with the driving member at both ends. When the locking member is in the locked position, the locking end is located in the lock groove. When the locking member is in the unlocked position, the locking end disengages from the lock groove.

[0010] In one embodiment, the locking groove is open in the axial direction of the rotating shaft, and the locking end moves in the axial direction of the rotating shaft to enter or exit the locking groove.

[0011] In one embodiment, the locking mechanism further includes an elastic member for holding the locking member in the locked position, the middle portion of the locking member is hinged to form a rocker mechanism, and the driving member overcomes the elastic force of the elastic member to drive the locking member into the locked position.

[0012] In one embodiment, the lock disc is divided in the circumferential direction into a locking area with each locking groove and an opposing arc area, and a positioning sidewall is provided between the locking area and the arc area;

[0013] The side edge of the locking area is recessed relative to the side edge of the arc area to form a clearance area. The locking member is provided with a positioning member that protrudes in the axial direction of the rotating shaft. The positioning member can move along the circumference of the locking disc within the clearance area. When the first leg and the second leg are in the unfolded state or the folded state, the positioning member is close to or abuts against the positioning side wall.

[0014] In one embodiment, the limiting pin is eccentrically positioned relative to the rotating shaft, and the limiting groove is arc-shaped and corresponds to the movement path of the limiting pin.

[0015] In one embodiment, in the folded state, the first leg and the second leg are close to each other, and in the unfolded state, the first leg and the second leg are far apart from each other;

[0016] During the process of the first leg and the second leg moving from the folded state to the unfolded state, the first sidewall of the limiting pin and the limiting groove abuts before the locking member abuts against the sidewall of the corresponding locking groove.

[0017] In one embodiment, during the process of the first leg and the second leg moving from the folded state to the unfolded state, the central angle A1 corresponding to the movement path of the limiting pin is less than or equal to the central angle A2 corresponding to the movement path of the locking member, relative to the rotation axis.

[0018] In one embodiment, the locking disc is disposed in the middle of the first leg and connected to the first leg via a base, the locking disc protruding relative to the first leg.

[0019] In one embodiment, the top of the second leg is provided with a rotating part and a mounting part extending radially from the rotating part, the locking disc and the rotating part are coaxially pivotally connected, the limiting mechanism is disposed between the locking disc and the rotating part, and the locking mechanism is disposed between the side edge of the locking disc and the mounting part.

[0020] The technical solution disclosed in this application uses a limiting mechanism to bear the load, while the locking mechanism is only used to maintain the current state, thereby effectively reducing the difficulty of unlocking, extending the product life, and improving the user experience.

[0021] The specific beneficial technical effects will be further explained in the specific implementation methods in conjunction with the specific structures or steps. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a dining chair structure that folds back and forth in one embodiment of this application;

[0023] Figure 2 for Figure 1 A schematic diagram of the side support structure of the dining chair that folds back and forth.

[0024] Figure 3 for Figure 2 A schematic cross-sectional view of the locking and limiting mechanisms of the side bracket at point AA;

[0025] Figure 4 An explosion diagram of the locking mechanism and the limiting mechanism;

[0026] Figure 5 An explosion diagram of the locking and limiting mechanisms from another perspective;

[0027] Figure 6 A schematic diagram illustrating the coordination between the locking mechanism and the limiting mechanism.

[0028] The annotations in the figure are explained as follows:

[0029] 100. Side support; 101. First support leg; 102. Second support leg; 103. Rotation axis; 110. Seat;

[0030] 200. Locking mechanism; 210. Locking disc; 211. Locking groove; 212. Positioning sidewall; 213. Clearance area; 214. Outer boundary; 215. Base; 220. Locking element; 221. Locking end; 222. Driving end; 223. Positioning element; 230. Driving element; 240. Elastic element; 250. Rotating part; 260. Mounting part; 261. Mounting seat;

[0031] 300, limiting mechanism; 310, limiting groove; 311, first side wall; 312, second side wall; 320, limiting pin. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] See appendix Figure 1 To be continued Figure 6 In the illustrated embodiment, this application discloses a folding dining chair, including two oppositely arranged side supports 100 and a seat 110 disposed between the two side supports 100. Each side support 100 includes a first leg 101 and a second leg 102 pivotally connected by a rotation shaft 103, and has an unfolded state and a folded state. In the figure, the first leg 101 is the front leg, and the second leg 102 is the rear leg. Correspondingly, the first leg 101 can also be the rear leg, and the second leg 102 can be the front leg. A locking mechanism 200 and a limiting mechanism 300 are provided between the first leg 101 and the second leg 102.

[0036] The locking mechanism 200 includes a locking disc 210 disposed on one of the first support leg 101 or the second support leg 102 and a locking member 220 disposed on the other. The locking disc 210 is provided with a plurality of locking grooves 211 arranged circumferentially. The locking member 220 is movably disposed and has a locking position for inserting into the locking groove 211 (see Appendix). Figure 3 and attached Figure 6 (as shown) and the unlocked position of disengaging from the lock groove 211. When the locking member 220 is in the locked position, the relative position of the first support leg 101 and the second support leg 102 is locked, that is, it remains in the unfolded state or the locked state. When the locking member 220 is in the unlocked position, the first support leg 101 and the second support leg can move relative to each other about the rotation axis 103, thereby realizing unfolding or folding.

[0037] The limiting mechanism 300 includes a limiting groove 310 disposed on one of the first leg 101 or the second leg 102 and a limiting pin 320 disposed on the other. In the unfolded state, the limiting pin 320 abuts against the first side wall 311 of the limiting groove 310 to limit the unfolding stroke of the first leg 101 and the second leg 102, and prevents the side wall of the locking groove 211 from pressing against the locking member 220.

[0038] The technical solution disclosed in this application uses a limiting mechanism 300 to bear the load and a locking mechanism 200 to maintain the current state, thereby effectively reducing the difficulty of unlocking, extending the product life, and improving the user experience.

[0039] In a specific embodiment of the locking mechanism 200, referring to the embodiment shown in the accompanying drawings, the locking mechanism 200 further includes a drive member 230 exposed to the outside. The user can drive the locking member 220 via the drive member 230. Furthermore, the locking mechanism 200 also includes an elastic member 240 for holding the locking member 220 in the locked position. The drive member 230 overcomes the elastic force of the elastic member 240 to drive the locking member 220 into the locked position. The elastic member 240 can be referred to in the accompanying drawings. Figure 3The spring shown can also be configured in other forms, such as a coil spring at the hinge of the locking member 220 in the embodiment below. In this embodiment, the locking member 220 is strip-shaped with a locking end 221 at one end and a driving end 222 that cooperates with the driving member 230 at the other end. When the locking member 220 is in the locked position, the locking end 221 is located in the locking groove 211. When the locking member 220 is in the unlocked position, the locking end 221 disengages from the locking groove 211. The locking member 220 is hinged in the middle to form a rocker mechanism. The driving member 230 and the elastic member 240 are both disposed at the locking end 221 and located on both sides respectively. The locking end 221 of the rocker mechanism-type locking member 220 moves axially on the rotating shaft 103. Correspondingly, the locking groove 211 is open axially on the rotating shaft 103, and the locking end 221 moves axially on the rotating shaft 103 to enter or exit the locking groove 211. The locking slot 211 can be provided in only one way, corresponding to either the unfolded or folded state. The other state can be achieved by the first support 101 and the second support 102 abutting against each other or by the cooperation of the limiting mechanism 300. In the illustrated embodiment, there are two locking slots 211, corresponding to the unfolded and folded states respectively.

[0040] See appendix Figure 6 In the illustrated embodiment, the locking disc 210 is divided circumferentially into a locking area with locking grooves 211 and an opposing arcuate area, with a positioning sidewall 212 between the locking area and the arcuate area. Figure 6 In the diagram, the dotted line indicates the outer edge boundary 214 corresponding to the arc area. The side edge of the locking area is recessed relative to the side edge of the arc area to form a clearance area 213. The locking member 220 is provided with a positioning member 223 that protrudes axially along the rotation axis 103. The positioning member 223 can move circumferentially along the locking disc 210 within the clearance area 213. When the first support leg 101 and the second support leg 102 are in the unfolded or folded state, the positioning member 223 approaches or abuts against the positioning side wall 212. The positioning member 223 protrudes relative to the locking end 221, so that regardless of the state of the locking member 220, the positioning member 223 can cooperate with the positioning side wall 212 of the locking disc to limit the limit stroke.

[0041] For a detailed implementation of the limiting mechanism 300, please refer to the appendix. Figure 4 To be continued Figure 6In the illustrated embodiment, the limiting pin 320 is eccentrically positioned relative to the rotation axis 103, and the limiting groove 310 is arc-shaped and corresponds to the movement path of the limiting pin 320. Furthermore, in the folded state, the first leg 101 and the second leg 102 are close together; in the unfolded state, the first leg 101 and the second leg 102 are far apart. During the transition from the folded state to the unfolded state, the first sidewall 311 of the limiting pin 320 and the limiting groove 310 abuts before the locking member 220 abuts against the sidewall of the corresponding locking groove 211. The second sidewall 312 of the limiting groove 310, opposite the first sidewall 311, can also perform a similar function. For example, during the transition from the unfolded state to the folded state, the second sidewall 312 of the limiting pin 320 and the limiting groove 310 abuts before the locking member 220 abuts against the sidewall of the corresponding locking groove 211. The aforementioned limiting can also be achieved by the mutual abutment of the first support 101 and the second support 102. When limiting exists in both directions, during the process of the first support 101 and the second support 102 moving from the folded state to the unfolded state, the central angle A1 corresponding to the movement path of the limiting pin 320 is less than or equal to the central angle A2 corresponding to the movement path of the locking member 220 compared to the rotation axis 103.

[0042] Regarding the specific installation method of the components, referring to the embodiment shown in the attached drawings, the locking disc 210 is disposed in the middle of the first support leg 101 and connected to the first support leg 101 via the base 215, with the locking disc 210 protruding relative to the first support leg 101. Further, the top of the second support leg 102 is provided with a rotating portion 250 and a mounting portion 260 extending radially from the rotating portion 250. The locking disc 210 and the rotating portion 250 are coaxially pivotally connected. A limiting mechanism 300 is disposed between the locking disc 210 and the rotating portion 250, and a locking mechanism 200 is disposed between the side edge of the locking disc 210 and the mounting portion 260. The mounting portion 260 is also provided with a mounting seat 261 for hinged locking member 220, providing motion constraint for the locking member 220.

[0043] The working process of the folding dining chair in this application is explained in detail below with reference to the accompanying drawings:

[0044] When the first leg 101 and the second leg 102 are in the extended state, their extreme positions are constrained by the limiting mechanism 300, and there is no stress fit between the locking element 220 and the locking groove 211 of the locking mechanism 200. Figure 6 In the middle, there is a gap between the locking element 220 and the side wall of the locking groove 211;

[0045] When it is necessary to change from the unfolded state to the folded state, the user drives the locking member 220 through the driving member 230 to overcome the force of the elastic member 240, for example, as shown in the attached figure. Figure 3As shown in the swing, the locking end 221 of the locking member 220 exits the locking groove 211, and the relative position lock between the first leg 101 and the second leg 102 is released;

[0046] The first leg 101 and the second leg 102 move closer to each other with the rotation axis 103 as the axis of rotation. At the same time, the locking end 221 sweeps across the axial side of the locking disc 210 until it is aligned with another locking groove 211. At this time, the first leg 101 and the second leg 102 move closer to each other. The locking member 220 enters the locking position again under the action of the elastic member 240, and the relative position between the first leg 101 and the second leg 102 is locked.

[0047] When you need to change from the folded state to the unfolded state, simply reverse the operation; this will not be elaborated further here.

[0048] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0049] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A folding dining chair, comprising two oppositely arranged side supports and a seat disposed between the two side supports, wherein each side support includes a first leg and a second leg pivotally connected by a rotation axis, and has an unfolded state and a folded state, characterized in that, A locking mechanism and a limiting mechanism are provided between the first leg and the second leg; The locking mechanism includes a locking disc disposed on one of the first leg or the second leg and a locking member disposed on the other leg. The locking disc is provided with a plurality of locking grooves arranged circumferentially. The locking member is movably disposed and has a locking position for inserting into the locking groove and a unlocking position for disengaging from the locking groove. The limiting mechanism includes a limiting groove disposed on one of the first leg or the second leg and a limiting pin disposed on the other leg. In the unfolded state, the limiting pin abuts against the first sidewall of the limiting groove to limit the unfolding stroke of the first leg and the second leg, and to prevent the sidewall of the locking groove from pressing against the locking member.

2. The folding dining chair according to claim 1, characterized in that, The locking mechanism also includes a driving member exposed to the outside. The locking member is strip-shaped with a locking end and a driving end that cooperates with the driving member at both ends. When the locking member is in the locked position, the locking end is located in the lock groove. When the locking member is in the unlocked position, the locking end is disengaged from the lock groove.

3. The folding dining chair according to claim 2, characterized in that, The locking groove is open in the axial direction of the rotating shaft, and the locking end moves in the axial direction of the rotating shaft to enter or exit the locking groove.

4. The folding dining chair according to claim 3, characterized in that, The locking mechanism further includes an elastic member for holding the locking member in the locked position, the middle of the locking member is hinged to form a rocker mechanism, and the driving member overcomes the elastic force of the elastic member to drive the locking member into the locked position.

5. The folding dining chair according to claim 1, characterized in that, The locking disc is divided into a locking area with locking grooves and an opposing arc area in the circumferential direction, and a positioning sidewall is provided between the locking area and the arc area; The side edge of the locking area is recessed relative to the side edge of the arc area to form a clearance area. The locking member is provided with a positioning member that protrudes in the axial direction of the rotating shaft. The positioning member can move along the circumference of the locking disc within the clearance area. When the first leg and the second leg are in the unfolded state or the folded state, the positioning member is close to or abuts against the positioning side wall.

6. The folding dining chair according to claim 1, characterized in that, The limiting pin is eccentrically positioned relative to the rotating shaft, and the limiting groove is arc-shaped and corresponds to the movement path of the limiting pin.

7. The folding dining chair according to claim 1, characterized in that, In the folded state, the first support leg and the second support leg are close to each other; in the unfolded state, the first support leg and the second support leg are far apart from each other. During the process of the first leg and the second leg moving from the folded state to the unfolded state, the first sidewall of the limiting pin and the limiting groove abuts before the locking member abuts against the sidewall of the corresponding locking groove.

8. The folding dining chair according to claim 7, characterized in that, During the process of the first leg and the second leg moving from the folded state to the unfolded state, the central angle A1 corresponding to the movement path of the limiting pin is less than or equal to the central angle A2 corresponding to the movement path of the locking member, compared to the rotation axis.

9. The folding dining chair according to claim 1, characterized in that, The locking disc is located in the middle of the first support leg and is connected to the first support leg via a base, and the locking disc protrudes from the first support leg.

10. The folding dining chair according to claim 1, characterized in that, The second leg has a rotating part at its top and a mounting part extending radially from the rotating part. The locking disc and the rotating part are coaxially pivotally connected. The limiting mechanism is disposed between the locking disc and the rotating part. The locking mechanism is disposed between the side edge of the locking disc and the mounting part.

Images