CN220045346U - Backrest folding structure and folding chair with same - Google Patents

Abstract

The utility model discloses a backrest folding structure which comprises a folding unit, a backrest component and a supporting leg component, wherein the upper end point part of the folding unit is connected with the backrest component, the lower end point part of the folding unit is connected with the supporting leg component, the folding unit comprises a first folding component, a second folding component and a linkage structure, the folding unit can be driven to fold or unfold by the longitudinal movement of the linkage structure, and in the maximum unfolding state, the first folding component and the second folding component are horizontally arranged, and the linkage structure is vertically arranged between the first folding component and the second folding component to form an I-shaped structure. The folding type folding device has the beneficial effects of convenience in folding, good stability and good use experience.

Description

Backrest folding structure and folding chair with same

Technical Field

The utility model relates to the technical field of outdoor products, in particular to a backrest folding structure and a folding chair with the backrest folding structure.

Background

Nowadays, with the gradual increase of the living standard of people, outdoor exercises are favored by more and more people, and when people perform outdoor exercises, in order to obtain better experiences, outdoor articles are generally required to be carried, and the folding chairs are undoubtedly an indispensable single article in the outdoor articles.

Because the folding chair has the advantages of being capable of being unfolded and folded for storage, when the folding chair is required to be carried or stored, the volume of the folding chair can be effectively reduced by folding the folding chair, so that the occupied space during carrying is reduced, the folding chair is more convenient to carry, and when the folding chair is required to be used, a stable chair can be formed by unfolding the folding chair, and people can enjoy a more comfortable rest environment outdoors.

However, in the folding chair of the prior art, the operation is not simple enough when the backrest folding structure is folded, the user experience is not good, and the stability of the leg assembly at the bottom end is not sufficient.

Disclosure of Invention

The utility model aims to provide a backrest folding structure which is convenient to fold, good in stability and good in use experience.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a backrest folding structure, characterized in that: including folding unit, back subassembly and spike subassembly, folding unit's upper end point portion with back subassembly is connected, lower end point portion with the spike subassembly is connected, folding unit includes first folding subassembly, second folding subassembly and linkage, linkage's longitudinal movement can drive folding unit folds or expands, and when the biggest state of expanding, first folding subassembly with second folding subassembly level sets up, the vertical setting of linkage is between the two, forms I shape structure.

Preferably, the first folding component comprises a first rotating rod and a second rotating rod, two ends of the first rotating rod are respectively hinged with the backrest component and the linkage structure, and two ends of the second rotating rod are respectively hinged with the backrest component and the linkage structure; the second folding assembly comprises a third rotating rod and a fourth rotating rod, two ends of the third rotating rod are hinged to the supporting leg assembly and the linkage structure respectively, two ends of the fourth rotating rod are hinged to the supporting leg assembly and the linkage structure respectively, when the linkage structure longitudinally moves, the linkage structure can drive the backrest assembly to fold or unfold through rotation of the first rotating rod and the second rotating rod, and the third rotating rod and the fourth rotating rod drive the supporting leg assembly to fold or unfold.

As another preferred aspect, the linkage structure includes a vertical rod, a first linkage member and a second linkage member, the first linkage member is disposed between the first rotating rod and the second rotating rod, the second linkage member is disposed between the third rotating rod and the fourth rotating rod, and the first linkage member and the second linkage member are connected through the vertical rod, so that the first linkage member and the second linkage member can move longitudinally in synchronization.

Further preferably, the first rotating rod and the second rotating rod are both hinged to the backrest assembly, a movable hole is formed in the upper end of the upright rod, and the movable hole is of a strip-shaped structure, so that the first linkage piece can rotate relative to the upright rod in a front-back and upward mode.

Still preferably, the support leg assembly includes a support leg, the third rotating rod and the fourth rotating rod are both hinged with a rotating seat, the rotating seat is hinged on the support leg, and the rotating seat can rotate around and upwards by taking the hinge shaft as a rotation center.

Still preferably, the supporting leg assembly comprises a sliding sleeve and a supporting leg, the third rotating rod and the fourth rotating rod are both hinged with a rotating seat, the rotating seat is hinged on the sliding sleeve, the rotating seat can rotate front and back upwards by taking a hinge shaft as a rotating center, the sliding sleeve is sleeved on the supporting leg in a sliding manner, and two limiting protrusions for being matched and limiting the sliding range of the sliding sleeve are arranged on the supporting leg.

Further preferably, the first rotating rod and the second rotating rod are symmetrically arranged, the third rotating rod and the fourth rotating rod are symmetrically arranged, and when the folding unit is in a maximum unfolding state, the first rotating rod, the second rotating rod, the third rotating rod and the fourth rotating rod are all in a horizontal arrangement state.

Further preferably, the first linkage member includes a limiting portion disposed at a top end, and when the first rotation lever and the second rotation lever are in a horizontally disposed state, the limiting portion cooperates with the first rotation lever and the second rotation lever to limit the first linkage member from moving longitudinally downward.

Further preferably, the second linkage member includes a reinforcement portion provided at a top end, and the reinforcement portion cooperates with the third and fourth rotation bars to restrict the second linkage member from moving longitudinally downward when the third and fourth rotation bars are in a horizontally disposed state.

The utility model also provides a folding chair which comprises the backrest folding structure.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model adopts the technical means of arranging the folding unit and connecting the lower end point part of the folding unit on the supporting leg assembly, so that the stability of the supporting leg assembly can be effectively increased.

Drawings

FIG. 1 is an exploded view of a folding chair;

FIG. 2 is a schematic view of the structure of the folding chair when unfolded;

FIG. 3 is a schematic view of the structure of the backrest folded structure when unfolded;

FIG. 4 is a schematic view of the folding structure of the backrest

FIG. 5 is an enlarged partial schematic view of FIG. 3A;

FIG. 6 is an enlarged partial schematic view at B in FIG. 3;

FIG. 7 is a schematic view of the junction of the upright and the first linkage;

FIG. 8 is a cross-sectional view of the junction of the upright and the first linkage;

FIG. 9 is a schematic view of the back rest folding structure as it begins to fold;

FIG. 10 is a schematic view of the folded back structure after folding;

FIG. 11 is a schematic view of a structure of another modified embodiment of the folding chair;

fig. 12 is a partially enlarged schematic view of fig. 11 at C.

In the figure: 1. a backrest folding structure; 11. a folding unit; 111. an upper end point portion; 112. a lower end point portion; 113. a first folding component; 1131. a first rotating lever; 1132. a second rotating lever; 114. a second folding assembly; 1141. a third rotating lever; 1142. a fourth rotating lever; 115. a linkage structure; 1151. a vertical rod; 1152. a first linkage member; 1153. a second linkage member; 1154. a movable hole; 1155. a limit part; 1156. a reinforcing part; 1157. a connecting shaft; 116. a rotating seat; 13. a support foot assembly; 131. a support leg; 1311. a limiting block; 132. a sliding sleeve; 2. a cushion folding structure; 3. a handrail structure; 4. a chair surface.

Detailed Description

The present utility model will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present utility model, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present utility model that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1-10, the preferred embodiment of the present utility model is:

the utility model provides a back beta structure 1, including folding unit 11, back subassembly and spike subassembly 13, the upper end point portion 111 and the back subassembly of folding unit 11 are connected, lower end point portion 112 and spike subassembly 13 are connected, folding unit 11 includes first folding subassembly 113, second folding subassembly 114 and linkage structure 115, the longitudinal movement of linkage structure 115 can drive folding unit 11 and fold or expand, and when the biggest state of expanding, first folding subassembly 113 and second folding subassembly 114 level set up, the vertical setting of linkage structure 115 is between the two, form the I-shaped structure.

The folding unit 11 of the present utility model is mainly formed by the first folding component 113, the second folding component 114 and the linkage structure 115, and in the maximum unfolded state, the three components can form an i-shaped structure, which has better stability, and can effectively increase the stability of the backrest folding structure 1 while achieving folding.

Further, since in the backrest folding structure of the prior art, most of the end points of the folding unit are mounted on the backrest assembly, that is, the whole structure of the folding unit is completely mounted on the backrest assembly, so that the stability of the supporting leg assembly is poor, the supporting leg assembly plays a supporting role for the whole structure, the stability of the supporting leg assembly is very important for the safety of the user, and therefore, improvement on the prior art is required to effectively solve the technical problems. In this regard, in the present embodiment, the lower end portion 112 of the folding unit 11 is connected to the temple assembly 13, so that the folding unit 11 may function to increase the stability of the temple assembly 13, so that the backrest folding structure 1 of the present utility model has better stability in use, and the folding chair including the backrest folding structure 1 has higher safety in use.

Further, in the present embodiment, since the linkage structure 115 is disposed in the folding unit 11, and the folding and unfolding of the folding unit 11 can be achieved by driving the linkage structure 115 longitudinally, when in use, a user can directly control the folding or unfolding of the backrest folding structure 1 by pulling or pressing the linkage structure 115, so that the operation is simpler and more convenient, and the use experience is better.

Specifically, as shown in fig. 3, 4, 9 and 10, in the present embodiment, the first folding assembly 113 includes a first rotating rod 1131 and a second rotating rod 1132, two ends of the first rotating rod 1131 are respectively hinged to the backrest assembly and the linkage structure 115, and two ends of the second rotating rod 1132 are respectively hinged to the backrest assembly and the linkage structure 115; the second folding assembly 114 includes a third rotating rod 1141 and a fourth rotating rod 1142, two ends of the third rotating rod 1141 are respectively hinged with the supporting leg assembly 13 and the linkage structure 115, two ends of the fourth rotating rod 1142 are respectively hinged with the supporting leg assembly 13 and the linkage structure 115, when the linkage structure 115 moves longitudinally, the linkage structure 115 can drive the backrest assembly to fold or unfold through the rotation of the first rotating rod 1131 and the second rotating rod 1132, and drive the supporting leg assembly 13 to fold or unfold through the third rotating rod 1141 and the fourth rotating rod 1142. The structure is simple and stable, the operation is simple and convenient, and the understanding and the use of a user are easy.

Further, in the present embodiment, the linkage 115 includes a vertical rod 1151, a first linkage 1152 and a second linkage 1153, the first linkage 1152 is disposed between the first rotating rod 1131 and the second rotating rod 1132, the second linkage 1153 is disposed between the third rotating rod 1141 and the fourth rotating rod 1142, and the first linkage 1152 and the second linkage 1153 are connected by the vertical rod 1151, so that the first linkage 1152 and the second linkage 1153 can perform synchronous longitudinal movement. The first and second linkage members 1152, 1153 may control the first and second folding assemblies 113, 114, respectively, and the upright 1151 may enable simultaneous longitudinal movement of the first and second linkage members 1152, 1153 such that the linkage 115 may enable simultaneous lateral folding of the first and second folding assemblies 113, 114, and the back and temple assemblies 13.

Further, in the present embodiment, the first rotating lever 1131 and the second rotating lever 1132 are symmetrically disposed, the third rotating lever 1141 and the fourth rotating lever 1142 are symmetrically disposed, and when the folding unit 11 is in the maximum unfolded state, the first rotating lever 1131, the second rotating lever 1132, the third rotating lever 1141 and the fourth rotating lever 1142 are all in the horizontally disposed state. The above structure effectively ensures the synchronicity of the first folding component 113 and the second folding component 114, so that the structure is more reasonable, the use reliability is higher, and the maximum unfolding state of the backrest folding structure 1 is the theoretical maximum unfolding state because the first rotating rod 1131, the second rotating rod 1132, the third rotating rod 1141 and the fourth rotating rod 1142 can be in the horizontal arrangement state at the same time, therefore, the utility model has the advantages of simple and stable structure, reasonable structure and high structure utilization rate.

However, if the linkage structure 115 moves downward, the bottom dead center of the linkage structure 115 is the minimum folded state, so that the user needs to drive the linkage structure 115 to move upward when the backrest folding structure 1 is unfolded from the minimum folded state, and at this time, one hand is required to push the linkage structure 115 upward, and the other hand is required to press one side of the backrest assembly to prevent the whole structure from being lifted, so that the linkage structure 115 cannot move longitudinally relatively. In this regard, as shown in fig. 9, in the present embodiment, the first linkage 1152 includes a limiting portion 1155 disposed at a top end, and when the first rotating rod 1131 and the second rotating rod 1132 are in a horizontally disposed state, the limiting portion 1155 cooperates with the first rotating rod 1131 and the second rotating rod 1132 to limit the first linkage 1152 from moving longitudinally downward. The above structure can effectively solve the above problem, so that the bottom dead center of the linkage structure 115 is in the maximum unfolding state, and the top dead center is in the minimum folding state, therefore, when the backrest folding structure 1 is unfolded from the minimum folding state, a user only needs to hold the backrest assembly, and after one side of the supporting leg assembly 13 is slightly tilted, the first linkage member 1152 is pressed downwards, which is more labor-saving and convenient, and in addition, the limiting part 1155 is arranged on the first linkage member 1152 above, which is more convenient for the user to use, and optimizes the use experience of the user.

Further, in the present embodiment, the second linkage member 1153 includes a reinforcing portion 1156 disposed at a top end, and when the third rotary rod 1141 and the fourth rotary rod 1142 are in a horizontally disposed state, the reinforcing portion 1156 cooperates with the third rotary rod 1141 and the fourth rotary rod 1142 to limit the second linkage member 1153 from moving longitudinally downward. The above structure serves to cooperate with the limiting portion 1155 to further limit the longitudinal downward movement of the linkage structure 115, thereby increasing the stability of the overall structure.

As shown in fig. 3 and 4, the backrest folding structure 1 is folded in the front-rear direction as well as in the transverse direction, and when folded in the front-rear direction, the backrest assembly and the temple assembly 13 are rotated relatively, and because the four end points of the folding unit 11 are not mounted on the backrest assembly or the temple assembly 13, the upper end point portion 111 moves along with the backrest assembly when folded in the front-rear direction, the lower end point portion 112 moves along with the temple assembly 13, and therefore, the folding unit 11 deflects in the front-rear direction as a whole, and the angle between the folding unit 11 and the backrest assembly and the temple assembly 13 changes.

In this regard, as shown in fig. 3, 5, 7 and 8, in the present embodiment, the first rotating rod 1131 and the second rotating rod 1132 are both hinged on the backrest assembly, the upper end of the upright 1151 is provided with a movable hole 1154, and the movable hole 1154 has a strip structure, so that the first linkage member 1152 can rotate relative to the upright 1151 in a front-back direction. At the first folding assembly 113, the first rotating rod 1131 and the second rotating rod 1132 are directly hinged to the backrest assembly, so that the first rotating rod 1131 and the second rotating rod 1132 can synchronously deflect forwards and backwards along with the backrest assembly and drive the first linkage 1152 to deflect, and therefore, in order to prevent the locking, an elongated movable hole 1154 is formed between the upright rod 1151 and the first linkage 1152, so that the connecting shaft 1157 has a movable space for rotating forwards and backwards, and when the backrest folding structure 1 is folded forwards and backwards, the first linkage 1152 can rotate relative to the upright rod 1151, thereby reliably ensuring the stable forward and backward folding.

Further, as shown in fig. 3 and 6, in the present embodiment, the temple assembly 13 includes a support leg 131, the third rotating rod 1141 and the fourth rotating rod 1142 are each hinged with a rotating base 116, the rotating base 116 is hinged to the support leg 131, and the rotating base 116 can rotate back and forth and upward about the hinge axis as the rotation center.

As shown in fig. 11 and 12, as a modification of the above preferred embodiment, the temple assembly 13 includes a slide bushing 132 and a leg 131, the slide bushing 132 is slidably coupled to the leg 131, the third pivot rod 1141 and the fourth pivot rod 1142 are each hinged with a pivot base 116, the pivot base 116 is hinged to the slide bushing 132, and the pivot base 116 can be pivoted back and forth about a pivot axis.

Further, as shown in fig. 12, in the modified embodiment, two stoppers 1311 for cooperatively restricting the sliding range of the slide sleeve 132 are provided on the leg 131. The above structure is used to limit the sliding range of the stopper 1311.

In both the present embodiment and the modified embodiment, the third rotating rod 1141 and the fourth rotating rod 1142 are hinged with the rotating seat 116, so as to effectively ensure that the second folding component 114 freely rotates in the front-back direction and further ensures that the front-back folding is stably performed, but in the present embodiment, the rotating seat 116 is directly hinged with the supporting leg 131, while in the modified embodiment, the rotating seat 116 is hinged with the slidable sliding sleeve 132, both the above structures can effectively ensure that the second folding component 114 is transversely folded, and only different structural parameters need to be set according to different manners, for example, the position and the corresponding length of the upright 1151 when the rotating seat 116 is directly hinged, and the sliding range of the sliding sleeve 132 and the corresponding length of the upright 1151 when the rotating seat 116 is hinged with the sliding sleeve 132.

It should be noted that, in the present embodiment, the upper end portion 111 refers to two outer end points of the first connecting rod and the second connecting rod, and the lower end portion refers to two outer end points of the third connecting rod and the fourth connecting rod.

As shown in fig. 1, the present utility model also provides a folding chair, which comprises the backrest folding structure 1.

Further, in the folding chair, the cushion folding structure 2, the armrest structure 3 and the seat 4 are further included, and since the above-mentioned structures do not relate to the point of the utility model and the specific structure can refer to the prior art, a detailed description thereof will not be given.

The foregoing has outlined the basic principles, features, and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A backrest folding structure, characterized in that: including folding unit, back subassembly and spike subassembly, folding unit's upper end point portion with back subassembly is connected, lower end point portion with the spike subassembly is connected, folding unit includes first folding subassembly, second folding subassembly and linkage, linkage's longitudinal movement can drive folding unit folds or expands, and when the biggest state of expanding, first folding subassembly with second folding subassembly level sets up, the vertical setting of linkage is between the two, forms I shape structure.

2. A backrest folding structure as defined in claim 1, wherein: the first folding component comprises a first rotating rod and a second rotating rod, two ends of the first rotating rod are respectively hinged with the backrest component and the linkage structure, and two ends of the second rotating rod are respectively hinged with the backrest component and the linkage structure; the second folding assembly comprises a third rotating rod and a fourth rotating rod, two ends of the third rotating rod are hinged to the supporting leg assembly and the linkage structure respectively, two ends of the fourth rotating rod are hinged to the supporting leg assembly and the linkage structure respectively, when the linkage structure longitudinally moves, the linkage structure can drive the backrest assembly to fold or unfold through rotation of the first rotating rod and the second rotating rod, and the third rotating rod and the fourth rotating rod drive the supporting leg assembly to fold or unfold.

3. A backrest folding structure as defined in claim 2, wherein: the linkage structure comprises a vertical rod, a first linkage piece and a second linkage piece, wherein the first linkage piece is arranged between the first rotating rod and the second rotating rod, the second linkage piece is arranged between the third rotating rod and the fourth rotating rod, and the first linkage piece and the second linkage piece are connected through the vertical rod, so that the first linkage piece and the second linkage piece can synchronously longitudinally move.

4. A backrest folding structure as claimed in claim 3, wherein: the first rotating rod and the second rotating rod are both hinged to the backrest component, a movable hole is formed in the upper end of the vertical rod, and the movable hole is of a strip-shaped structure, so that the first linkage piece can rotate forwards and backwards upwards relative to the vertical rod.

5. A backrest folding structure as claimed in claim 3, wherein: the supporting leg assembly comprises supporting legs, the third rotating rod and the fourth rotating rod are hinged with rotating seats, the rotating seats are hinged to the supporting legs, and the rotating seats can rotate forwards and backwards by taking a hinge shaft as a rotating center.

6. A backrest folding structure as claimed in claim 3, wherein: the supporting leg assembly comprises a sliding sleeve and supporting legs, wherein the third rotating rod and the fourth rotating rod are respectively hinged with a rotating seat, the rotating seats are hinged to the sliding sleeve, the rotating seats can rotate around and upwards by taking a hinge shaft as a rotating center, the sliding sleeve is sleeved on the supporting legs in a sliding manner, and two limiting blocks used for being matched and limiting the sliding range of the sliding sleeve are arranged on the supporting legs.

7. A backrest folding structure as claimed in claim 3, wherein: the first rotating rod and the second rotating rod are symmetrically arranged, the third rotating rod and the fourth rotating rod are symmetrically arranged, and when the folding unit is in the maximum unfolding state, the first rotating rod, the second rotating rod, the third rotating rod and the fourth rotating rod are in horizontal arrangement states.

8. A backrest folding structure as defined in claim 7, wherein: the first linkage piece comprises a limiting part arranged at the top end, and when the first rotating rod and the second rotating rod are in a horizontal arrangement state, the limiting part is matched with the first rotating rod and the second rotating rod to limit the first linkage piece to longitudinally move downwards.

9. A backrest folding structure as defined in claim 8, wherein: the second linkage member comprises a reinforcing part arranged at the top end, and when the third rotating rod and the fourth rotating rod are in a horizontal arrangement state, the reinforcing part is matched with the third rotating rod and the fourth rotating rod to limit the second linkage member to longitudinally move downwards.

10. A folding chair, characterized in that: a backrest folding structure comprising a backrest as claimed in any one of claims 1 to 9.