CN212630403U - Support locking mechanism and child dining chair - Google Patents

Abstract

The utility model relates to a support locking mechanism, which comprises a connecting cross rod, a first pull rod piece and a locking part, wherein the first pull rod piece comprises a first connecting seat and a first pull rod, the first pull rod comprises a first arm rod, a second arm rod and a first elastic piece, a first spring piece is arranged between the first arm rod and the second arm rod, the first arm rod is connected on the first connecting seat, and the second arm rod extends to the middle part of the connecting cross rod; the locking part can cooperate the butt joint with the second armed lever, and when the locking part locked the regulation, the second armed lever moved to the middle part of connecting the horizontal pole, and first elastic component deformation is kept the taut trend of motion in middle part of first armed lever to connecting the horizontal pole. The utility model discloses under the relative prerequisite of locking of realization support unilateral side, further deformation through first elastic component is keeping the locking force for the unilateral side of support is in more stable locking state, and consequently, the support after the locking is not only firm, stable, and is safer moreover, can also increase user's experience simultaneously and feels.

Description

Support locking mechanism and child dining chair

Technical Field

The utility model belongs to children's articles for use field, concretely relates to support locking mechanism still relates to a children's dining chair with this support locking mechanism simultaneously.

Background

In children's articles for use field, in order to carry and practical conveniently, it adopts that the support can both fold basically and expand, for example children's dining chair, because both sides landing leg length is longer, in case expand the back, do not form the locking between the landing leg of both sides and strengthen, in long-term the use, in case spare part is loose, exert external force to the dining chair a little after, whole dining chair structure takes place to rock easily, and user's body feels relatively poor, has had certain potential safety hazard moreover.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art not enough, provide a modified support locking mechanism.

And simultaneously, the utility model discloses still relate to a children's dining chair with this support locking mechanism.

For solving the technical problem, the utility model discloses take following technical scheme:

a bracket locking mechanism, the bracket including a first side support bar and a second side support bar on opposite sides, the bracket locking mechanism comprising:

the connecting cross rod is connected to the first side supporting rod and the second side supporting rod from two end parts;

the first pull rod piece is arranged inside the connecting cross rod and comprises a first connecting seat connected with the first side supporting rod and a first pull rod arranged on the first connecting seat and extending towards the middle part of the connecting cross rod;

a locking part which is arranged on the connecting cross bar and can pull and lock the first pull rod towards the middle part,

particularly, the first pull rod comprises a first arm rod, a second arm rod and a first elastic piece, wherein the first elastic piece is arranged between the first arm rod and the second arm rod, the first arm rod is connected to the first connecting seat, and the second arm rod extends towards the middle part of the connecting cross rod;

the locking part can cooperate the butt joint with the second armed lever, and when the locking part locked the regulation, the second armed lever moved to the middle part of connecting the horizontal pole, and first elastic component deformation is kept the taut trend of motion in middle part of first armed lever to connecting the horizontal pole.

Preferably, a first hook is formed at the end part of the first arm rod, which is far away from the first connecting seat, a second hook is formed at the end part of the second arm rod, which is far away from the middle part of the connecting cross rod, the hooking directions of the first hook and the second hook are opposite and are mutually hooked, and the first elastic piece is an elastic rubber block and is positioned in a hooking area formed by the first hook and the second hook; when the locking part is locked, the first elastic piece is in a compressed state.

According to a specific implementation of the utility model and preferred aspect, support locking mechanism still includes second pull rod spare, and this second pull rod spare sets up inside connecting the horizontal pole, and includes the second connecting seat that is connected with second side support pole, set up on the second connecting seat and to the second pull rod that extends in the middle part of connecting the horizontal pole, and locking part can rotate the setting and just can be synchronous with first pull rod and second pull rod to the pulling of middle part and locking on connecting the horizontal pole. Thus, when the unilateral structure of both sides is locked, the relative locking between the first side bracing piece of both sides and the second side support can also be realized.

Preferably, the first pull rod piece and the second pull rod piece are symmetrically arranged about the middle of the connecting cross rod, the second pull rod comprises a third arm rod, a fourth arm rod and a second elastic piece, a third hook is formed at the end part, far away from the second connecting seat, of the third arm rod, a fourth hook is formed at the end part, far away from the middle of the connecting cross rod, of the fourth arm rod, the third hook and the fourth hook are opposite in hooking direction and mutually hooked, the second elastic piece is an elastic rubber block, the locking part can be matched and butted with the second arm rod and the fourth arm rod, when the locking part is locked and adjusted, the second arm rod and the fourth arm rod respectively move towards the middle of the connecting cross rod, and the first elastic piece and the second elastic piece are compressed and deformed and keep the movement tendency that the first arm rod and the third arm rod are respectively tensioned towards the middle of the connecting cross rod. That is, the locking force can be always maintained, so that the structure of the bracket is more stable.

Furthermore, the first arm rod is movably arranged on the first connecting seat along the length direction of the first arm rod and through a first pin shaft in an adjusting manner; the third arm rod is movably arranged on the second connecting seat along the length direction of the third arm rod and through a second pin shaft. So that there is sufficient space for switching movement between locking and unlocking.

According to still another embodiment and preferred aspect of the present invention, a first pillar-shaped boss is formed on the second arm, a first avoidance groove for avoiding the movement of the first pillar-shaped boss is formed on the connecting cross bar, and the first pillar-shaped boss passes through the first avoidance groove; be formed with the second cylindric boss on the fourth armed lever, be formed with the second of dodging the motion of second cylindric boss on the connection horizontal pole and dodge the groove, the second cylindric boss passes the second and dodges the groove setting, locking part sets up the adjusting module on connecting the horizontal pole including rotating, wherein form first cooperation groove and second cooperation groove on adjusting module, when adjusting module locking is adjusted, first cooperation groove matches the butt joint with first cylindric boss, second cooperation groove matches the butt joint with second cylindric boss, and by first cooperation groove and second cooperation groove progressively promote first cylindric boss and second cylindric boss respectively along first dodge the groove and the second dodge the groove to the middle part of connecting the horizontal pole removes.

In this example, the first engagement groove and the second engagement groove are both V-shaped.

Preferably, the first groove of dodging with the second dodges the trench in the bottom of connecting the horizontal pole, and is linked together the setting, and adjusting module is rectangular form, and sets up in the bottom of connecting the horizontal pole through pivot rotation from the middle part, and first cooperation groove and second cooperation groove correspond and set up at adjusting module's both ends, and respectively from the opposite side at long limit place to the sunken shaping in the adjusting module, when locking part locking was adjusted, adjusting module can dodge the groove closure with the first groove of dodging and second that dodges that communicates.

Further, locking part still including setting up on the pivot and being located connect the rotatory module in the horizontal pole, wherein be formed with respectively in the relative both sides of rotatory module from inside sunken first bayonet socket of lateral surface and second bayonet socket, rotatory module and adjusting module rotate in step, work as first cylindricality boss and second cylindricality boss respectively with first cooperation groove with when the butt joint is matchd to the second cooperation groove, rotatory module rotates in step, and the tip card that first connecting seat was kept away from to the second armed lever is gone into first bayonet socket, and the tip card that the second connecting seat was kept away from to the fourth armed lever is gone into the second bayonet socket. Therefore, through the arrangement of the rotating module, when the first pull rod and the second pull rod are locked relatively, the shaking of the pull rod is limited by the matching of the bayonet and the end part of the pull rod, the locking stability is further improved, and meanwhile, a moving space is provided for the movement of the pull rod.

In addition, locking part is still including setting up the spacing boss of connecting on the horizontal pole, and spacing boss has two, and be first spacing boss and the spacing boss of second respectively, and when adjusting module was taut first pull rod and second pull rod relatively, adjusting module with connect horizontal pole parallel arrangement, and contradict on spacing boss from length direction's side, wherein first spacing boss is closed with the opening in first cooperation groove, the spacing boss of second is closed with the opening in second cooperation groove.

The utility model discloses another technical scheme is: a child dining chair comprises a seat, a pedal and a bracket, wherein the bracket comprises a first side supporting rod and a second side supporting rod which are arranged on two opposite sides, in particular, the child dining chair also comprises the bracket locking mechanism, and the pedal is arranged on a connecting cross rod.

Due to the implementation of the above technical scheme, compared with the prior art, the utility model have the following advantage:

the utility model discloses under the prerequisite of realizing the relative locking of support unilateral side, further deformation through first elastic component is keeping the locking force for the unilateral side of support is in more stable locking state, thereby reduces the volume of rocking of supporting structure, and consequently, support after the locking, not only firm, stable, and safer moreover can also increase user's experience simultaneously and feel, and in addition, simple structure, it is convenient to implement, and with low costs.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of the child dining chair of the present invention;

FIG. 2 is a schematic view of the bracket locking mechanism of FIG. 1 in an unlocked state;

FIG. 3 is a schematic view of the bracket locking mechanism of FIG. 1 during tightening;

FIG. 4 is a schematic view of the bracket locking mechanism of FIG. 1 in a tensioned state;

FIG. 5 is a partial schematic view of the first pull rod of FIG. 1 (with the rubber block in a natural state);

FIG. 6 is a partial schematic view of the first pull rod of FIG. 1 (with the rubber block in a compressed state);

FIG. 7 is a partial schematic view of the second pull rod of FIG. 1 (with the rubber block in a natural state);

FIG. 8 is a partial schematic view of the second pull rod of FIG. 1 (with the rubber block in a compressed state);

wherein: 1. a seat;

2. a pedal;

3. a support; 31. a first side support bar; 31a, a first long groove; 32. a second side support bar; 32a, a second long groove;

4. a bracket locking mechanism; 40. connecting the cross bars; 41. a first pull rod member; 410. a first connecting seat; 411. a first pull rod; b1, a first arm lever; b2, a second arm lever; b3, a first elastic member; g1, a first hook; g2, a second hook; d1, a first pin; d2, a second pin shaft; 42. a second pull rod member; 420. a second connecting seat; 421. a second pull rod; b4, a third arm lever; b5, a fourth arm lever; b6, a second elastic element; g3, a third hook; g4, a fourth hook; d1, a first pin; d2, a second pin shaft; 43. a locking member; 430. an adjustment module; c1, a first mating groove; c2, a second matching groove; 431. a rotation module; k1, a first bayonet; k2 and a second bayonet; 432. a limiting boss; x1, a first limit boss; x2, a second limit boss; a1, a first pedestal elevation; a2, a second cylindrical boss; s, pivot.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, the child dining chair of the present embodiment includes a seat 1, a pedal 2, a frame 3, and a frame locking mechanism 4, wherein the frame 3 includes a first side support bar 31 and a second side support bar 32 at two opposite sides, and the frame locking mechanism 4 can lock not only the one-sided structure of the frame 3, but also the first side support bar 31 and the second side support bar 32.

Specifically, as shown in fig. 2 to 4, the stand locking mechanism 4 includes a connecting cross bar 40, a first pull rod 41, a second pull rod 42, and a locking member 43.

And a connecting cross bar 40 which is horizontally disposed between the first side support bar 31 and the second side support bar 32 and is connected to the first side support bar 31 and the second side support bar 32 from both ends.

The pedal 2 is fixed on the connecting cross bar 40, and the connecting cross bar 40 is hollow inside.

The first pulling rod 41 is disposed inside the connecting rail 40, and includes a first connecting seat 410 connected to the first side supporting rod 31, and a first pulling rod 411 disposed on the first connecting seat 410 and extending toward the middle of the connecting rail 40.

The second pulling rod 42 is disposed inside the connecting rail 40, and includes a second connecting seat 420 connected to the second side supporting rod 32, and a second pulling rod 421 disposed on the second connecting seat 420 and extending toward the middle of the connecting rail 40.

And a locking member 43 rotatably disposed on the connecting rail 40 and capable of synchronously pulling the first pull rod 411 and the second pull rod 421 toward the middle, wherein when the locking member 43 pulls the first pull rod 411 and the second pull rod 421 relatively, the first side support bar 31 and the second side support bar 32 are locked relatively.

In this example, the first and second tie members 41 and 42 are symmetrically disposed about the middle of the connecting rail 40.

Specifically, the first pull rod 411 shown in fig. 5 and 6 includes a first arm b1, a second arm b2, and a first elastic member b3, wherein the first arm b1 is movably and adjustably disposed on the first connecting seat 410 along the length direction thereof and through a first pin d1, the first elastic member b3 is disposed between the first arm b1 and the second arm b2, and the second arm b2 extends toward the middle of the connecting cross bar 40.

Specifically, a first hook g1 is formed at the end of the first arm b1 far away from the first connecting seat 410, a second hook g2 is formed at the end of the second arm b2 far away from the middle of the connecting cross bar 40, the first hook g1 and the second hook g2 are hooked in opposite directions and are hooked with each other, and the first elastic piece b3 is an elastic rubber block and is located in a hooking area formed by the first hook g1 and the second hook g 2.

According to the principle of symmetry, and as shown in fig. 7 and 8, the second pull rod 412 includes a third arm b4, a fourth arm b5, and a second elastic member b6, wherein the third arm b4 is movably and adjustably disposed on the second connecting block 420 along the length direction thereof and through a second pin d2, a second spring member b6 is disposed between the third arm b4 and the fourth arm b5, and the fourth arm b5 extends toward the middle of the connecting bar 40.

Specifically, a third hook g3 is formed at the end part of the third arm b4 far away from the second connecting seat 420, a fourth hook g4 is formed at the end part of the fourth arm b5 far away from the middle part of the connecting cross bar 40, the third hook g3 and the fourth hook g4 are hooked in opposite directions and are mutually hooked, and the second elastic piece b6 is an elastic rubber block and is positioned in a hooking area formed by the third hook g3 and the fourth hook g 4;

when the locking member 43 is locked, the first elastic piece b3 and the second elastic piece b6 are both in a compressed state.

In this example, through the regulation of locking part, can control overall structure's elasticity state, the elastic component is the block rubber simultaneously, and the block rubber belongs to elastic material, therefore, overall structure locking back locking force keeps all the time, further reduces overall structure's the volume of rocking effectively.

Specifically, the locking component 43 can be matched and butted with the second arm b2 and the fourth arm b5, when the locking component is locked and adjusted, the second arm b2 and the fourth arm b5 move towards the middle of the connecting cross bar 40 respectively, the first elastic piece b3 and the second elastic piece b6 deform and keep the moving trend that the first arm b1 and the third arm b4 are pulled towards the middle, and the first side support bar 31 and the second side support bar 32 on two sides are locked relatively.

As shown in fig. 2 to 4 again, a first cylindrical boss a1 is formed on the first pull rod 411, a first avoidance groove for avoiding the movement of the first cylindrical boss a1 is formed on the connecting crossbar 40, and the first cylindrical boss a1 passes through the first avoidance groove; a second cylindrical boss a2 is formed on the second pull rod 421, a second avoiding groove for avoiding the movement of the second cylindrical boss a2 is formed on the connecting cross bar 40, and the second cylindrical boss a2 penetrates through the second avoiding groove.

The locking means 43 includes an adjusting block 430 rotatably provided at the bottom of the connecting rail 40 from the middle by a pivot s, a rotating block 431 provided at the pivot s and located inside the connecting rail 40, and a stopper boss 432 provided at the bottom of the connecting rail 40.

The adjusting module 430 is in a long strip shape, and a first engaging groove c1 and a second engaging groove c2 are formed on the adjusting module 430, wherein the first engaging groove c1 and the second engaging groove c2 are correspondingly disposed at two end portions of the adjusting module 430, and are respectively formed by being recessed into the adjusting module 430 from opposite sides where the long sides are located. After the adjusting module 430 is adjusted by rotation, the first matching groove c1 is matched and butted with the first column-shaped boss a1, the second matching groove c2 is matched and butted with the second column-shaped boss a2, and the first column-shaped boss a1 and the second column-shaped boss a2 are gradually pushed by the first matching groove c1 and the second matching groove c2 to move towards the middle of the connecting cross rod 40 along the first avoidance groove and the second avoidance groove respectively. Therefore, the first pull rod and the second pull rod can be synchronously pushed to be close together by the matching of the matching groove and the cylindrical boss, and the first side supporting rod and the second side supporting rod are relatively locked.

In this example, the first pillar-shaped protrusion a1 is disposed at the bottom of the second arm b2, the second pillar-shaped protrusion a2 is disposed at the bottom of the fourth arm b5, the first engaging groove c1 and the second engaging groove c2 are V-shaped grooves, meanwhile, the first avoiding groove and the second avoiding groove are disposed in communication, and when the locking component 43 is locked and adjusted, the adjusting module 430 can close the first avoiding groove and the second avoiding groove which are in communication.

The rotating module 431 and the adjusting module 430 move synchronously, in this example, a first bayonet k1 and a second bayonet k2 which are recessed inwards from the outer side surface are respectively formed at two opposite sides of the rotating module 431, when the first column-shaped boss a1 and the second column-shaped boss a2 are respectively matched and butted with the first matching groove c1 and the second matching groove c2, the rotating module 431 rotates synchronously, the end part of the second arm b2 far away from the first connecting seat 410 is clamped into the first bayonet k1, and the end part of the fourth arm b5 far away from the second connecting seat 420 is clamped into the second bayonet k 2. Therefore, through the arrangement of the rotating module, when the first pull rod and the second pull rod are locked relatively, the shaking of the pull rod is limited by the matching of the bayonet and the end part of the pull rod, the locking stability is further improved, and meanwhile, a moving space is provided for the movement of the pull rod.

The two limiting bosses 432 are a first limiting boss x1 and a second limiting boss x2, when the adjusting module 430 locks the first pull rod 411 and the second pull rod 421 relatively, the adjusting module 430 and the connecting cross rod 40 are arranged in parallel and abut against the limiting bosses 432 from the side edges in the length direction, wherein the first limiting boss x1 closes the opening of the first matching groove c1, and the second limiting boss x2 closes the opening of the second matching groove c 2. Here, through spacing boss closed cooperation groove for difficult the appearance of adjusting module is become flexible, with the stability after guaranteeing the locking.

In this example, a first long groove 31a and a second long groove 32a extending along the length direction of the first side support bar 31 and the second side support bar 32 are respectively disposed on the opposite inner sides of the first side support bar 31 and the second side support bar 32, the first connecting seat 410 is slidably connected in the first long groove 31a, and the second connecting seat 420 is slidably connected in the second long groove 32 a. The purpose of this is: the position adjustment of the whole support locking mechanism is convenient, so that the use requirements of children are met.

As for how the first connecting seat 410 and the second connecting seat 420 slide, the first connecting seat 410 and the second connecting seat 420 may be respectively provided with a connecting lug, and the connecting lugs are located in the first elongated slot 31a and the second elongated slot 32a, so that not only can the sliding adjustment be satisfied, but also the connecting seats can be prevented from falling off from the corresponding support rods. Simultaneously, in order to improve the stability of 2 height of footboard, can also adopt the external member to lock the connecting seat with the bracing piece that corresponds relatively.

In summary, the implementation process of this embodiment is as follows:

as shown in fig. 2, 5 and 7, when the bracket locking mechanism is in an unlocked state, the two rubber blocks (the first elastic member b3 and the second elastic member b 6) are in a natural state, and when the first side support bar 31 and the second side support bar 32 on both sides need to be locked, referring to fig. 3, the adjusting module 430 is rotated, such that the first matching groove c1 is in matching butt joint with the first pillar-shaped boss a1, the second matching groove c2 is in matching butt joint with the second pillar-shaped boss a2, and the first matching groove c1 and the second matching groove c2 gradually push the first pillar-shaped boss a1 and the second pillar-shaped boss a2 to move towards the middle along the first avoiding groove and the second avoiding groove, respectively, so as to achieve the relative tightening of the first pull rod 411 and the second pull rod 421, referring to fig. 3, 6 and 8, the adjusting module 430 is rotated to a position parallel to the connecting crossbar 40 (or close the first avoiding groove and the second avoiding groove), the opening of first cooperation groove c1 is closed by first spacing boss x1, the opening of second cooperation groove c2 is closed by second spacing boss x2, the tip that first connecting seat 410 was kept away from to second armed lever b2 is gone into first bayonet socket k1, the tip that second connecting seat 420 was kept away from to fourth armed lever b5 is gone into second bayonet socket k2, at this moment, two rubber blocks all are in the extrusion state to the locking of support locking mechanism has been accomplished.

The present invention has been described in detail, but the present invention is not limited to the above-described embodiments. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. A bracket locking mechanism, the bracket including a first side support bar and a second side support bar on opposite sides, the bracket locking mechanism comprising:

the connecting cross rod is respectively connected to the first side supporting rod and the second side supporting rod from two end parts;

the first pull rod piece is arranged inside the connecting cross rod and comprises a first connecting seat connected with the first side supporting rod and a first pull rod arranged on the first connecting seat and extending towards the middle part of the connecting cross rod;

a locking part which is arranged on the connecting cross bar and can pull and lock the first pull rod towards the middle part,

the method is characterized in that:

the first pull rod comprises a first arm rod, a second arm rod and a first elastic piece, wherein the first elastic piece is arranged between the first arm rod and the second arm rod, the first arm rod is connected to the first connecting seat, and the second arm rod extends towards the middle part of the connecting cross rod;

the locking part can be matched and butted with the second arm rod, when the locking part is locked and adjusted, the second arm rod moves towards the middle of the connecting cross rod, and the first elastic part deforms and keeps the moving trend that the first arm rod stretches towards the middle of the connecting cross rod.

2. The bracket locking mechanism of claim 1, wherein: a first hook is formed at the end part of the first arm rod, which is far away from the first connecting seat, a second hook is formed at the end part of the second arm rod, which is far away from the middle part of the connecting cross rod, the hooking directions of the first hook and the second hook are opposite and mutually hooked, and the first elastic piece is an elastic rubber block and is positioned in a hooking area formed by the first hook and the second hook; when the locking component is locked, the first elastic piece is in a compressed state.

3. The bracket locking mechanism according to claim 1 or 2, wherein: the support locking mechanism further comprises a second pull rod piece, the second pull rod piece is arranged inside the connecting cross rod and comprises a second connecting seat connected with the second side supporting rod and a second pull rod arranged on the second connecting seat and extending towards the middle of the connecting cross rod, and the locking part can be rotatably arranged on the connecting cross rod and can synchronously pull and lock the first pull rod and the second pull rod towards the middle.

4. The bracket locking mechanism of claim 3, wherein: the first pull rod piece and the second pull rod piece are symmetrically arranged around the middle part of the connecting cross rod, the second pull rod comprises a third arm rod, a fourth arm rod and a second elastic piece, wherein a third hook is formed at the end part of the third arm rod far away from the second connecting seat, a fourth hook is formed at the end part of the fourth arm rod far away from the middle part of the connecting cross rod, the hooking directions of the third hook and the fourth hook are opposite and are mutually hooked, the second elastic piece is an elastic rubber block, the locking part can be matched and butted with the second arm lever and the fourth arm lever, when the locking component is locked and adjusted, the second arm lever and the fourth arm lever respectively move towards the middle part of the connecting cross rod, the first elastic piece and the second elastic piece are compressed and deformed and maintain the moving trend that the first arm rod and the third arm rod are respectively tensioned towards the middle part of the connecting cross rod.

5. The bracket locking mechanism of claim 4, wherein: the first arm rod is movably arranged on the first connecting seat along the length direction of the first arm rod and through a first pin shaft in an adjusting mode; the third arm rod is movably arranged on the second connecting seat along the length direction of the third arm rod and through a second pin shaft in an adjusting mode.

6. The bracket locking mechanism of claim 4, wherein: a first cylindrical boss is formed on the second arm rod, a first avoidance groove for avoiding the movement of the first cylindrical boss is formed on the connecting cross rod, and the first cylindrical boss penetrates through the first avoidance groove; be formed with second cylindric boss on the fourth armed lever, the connecting cross pole on be formed with and dodge the second of second cylindric boss motion dodges the groove, second cylindric boss passes the second dodge the groove setting, locking part sets up including rotating adjusting module on the connecting cross pole, wherein form first cooperation groove and second cooperation groove on the adjusting module, work as adjusting module locking when adjusting, first cooperation groove with first cylindricality boss matches the butt joint, second cooperation groove with second cylindricality boss matches the butt joint, and by first cooperation groove with second cooperation groove progressively promotes first cylindricality boss with first cylindricality boss along respectively first dodge the groove with the second dodge the groove to the middle part of connecting the cross pole removes.

7. The bracket locking mechanism of claim 6, wherein: the first groove of dodging with the second dodges the trench and is located connect the bottom of horizontal pole, and be linked together the setting, adjusting module be rectangular form, and set up through pivot rotation from the middle part the bottom of connecting the horizontal pole, first cooperation groove with second cooperation groove corresponds the setting and is in adjusting module's both ends, and respectively from the opposite side at long limit place towards sunken shaping in the adjusting module, work as when locking part locks the regulation, adjusting module can be with the intercommunication first groove of dodging with the second dodges the groove closure.

8. The bracket locking mechanism of claim 7, wherein: locking part is still including setting up on the pivot and being located connect the rotatory module in the horizontal pole, wherein rotatory module's the relative both sides are formed with respectively from outside surface inside sunken first bayonet socket and second bayonet socket, rotatory module with adjusting module rotates in step, works as first cylindricality boss with second cylindricality boss respectively with first cooperation groove with during the butt joint is matchd to the second cooperation groove, rotatory module rotates in step, the second armed lever keep away from the tip card of first connecting seat is gone into first bayonet socket, the fourth armed lever is kept away from the tip card of second connecting seat is gone into the second bayonet socket.

9. The bracket locking mechanism of claim 8, wherein: locking part still including setting up the spacing boss on the connection horizontal pole, spacing boss has two, and is the spacing boss of first spacing boss and second respectively, works as adjusting module will when first pull rod and second pull rod are taut relatively, adjusting module with connect horizontal pole parallel arrangement, and contradict from length direction's side spacing boss is last, wherein first spacing boss will the opening in first cooperation groove is closed, the spacing boss of second will the opening in second cooperation groove is closed.

10. A child dining chair, comprising a seat, a pedal, and a frame, wherein the frame comprises a first side support bar and a second side support bar at opposite sides, the child dining chair comprising: the child dining chair further comprises a frame locking mechanism as claimed in any one of claims 1 to 9, wherein the pedal is disposed on the connecting rail.

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