阅读说明：本技术 儿童高景观餐椅大关节 (Large joint of high landscape dining chair for children ) 是由 杨吉洋 于 2019-02-26 设计创作，主要内容包括：儿童高景观餐椅大关节,分别配置于餐椅左侧和右侧,每一侧的大关节包括基壳、内壳、芯框、键管、面罩、弹簧等,健管插于芯框导管,芯框位于内壳并铆接,基壳与内侧插接,钢销穿接健管上端圆孔、芯框长腰孔、内壳长腰孔、基壳双钩孔,大铆钉穿接健管长腰孔、芯框中心孔、内壳中心孔、基壳中心孔,压缩弹簧位于健管内的下底面和大铆钉之间,以大铆钉为旋转中心,基壳和内壳的外周设有可相抵的台面。本设计提供了一种在使用状态下充分安全、不使用时的收叠状态自锁定、展开进入使用及不使用时的收叠操作充分便捷、外观简洁的儿童餐椅大关节。(The large joints of the high-landscape dining chair for children are respectively arranged on the left side and the right side of the dining chair, each large joint on each side comprises a base shell, an inner shell, a core frame, a key tube, a face mask, a spring and the like, a key tube is inserted into a guide tube of the core frame, the core frame is positioned in the inner shell and riveted, the base shell is inserted into the inner side, a steel pin is connected with a round hole at the upper end of the key tube in a penetrating way, a long waist hole of the core frame, a long waist hole of the inner shell and a double-hook hole of the base shell in a penetrating way, a large rivet is connected with the long waist hole of the key tube in a penetrating way, a center hole of the core frame, a center hole of the inner shell and a center hole of the base. The design provides the child dining chair large joint which is fully safe in use state, self-locked in folding state when not used, unfolded to enter use state and fully convenient in folding operation when not used and concise in appearance.)

1. The child high-landscape dining chair large joints are respectively arranged at the left side and the right side of the dining chair, the large joint at each side comprises a base shell and an inner shell which are spliced by the upper ends of the front leg rod and the rear leg rod at the side,

also comprises a core frame and a key tube,

the key pipe is inserted in the conduit of the core frame,

the core frame is positioned in the inner shell and is riveted and fixed on the inner shell,

the area of the outer base shell is overlapped and inserted with the area of the inner shell,

the steel pin is connected with the round holes at the two sides of the upper end of the key tube, the long waist holes of the two side plates of the core frame and the long waist holes of the two side plates of the inner shell in a penetrating way, and the two ends of the steel pin penetrate through the double-hook holes of the two side plates of the base shell,

the straight sections at the two ends of the double hook hole are positioned on the radius of a circle which takes the center hole of the base shell as the center of the circle, the arc sections of the double hook hole are positioned on the circumference which takes the center hole of the base shell as the center of the circle,

the big rivet passes through the long waist holes at the two sides of the key tube, the central holes of the two side plates of the core frame, the central holes of the two side plates of the inner shell and the central holes of the two side plates of the base shell,

the compression spring is positioned between the lower bottom surface in the key tube and the big rivet,

the large rivet is used as a rotation center, and the peripheries of the base shell and the inner shell are provided with table tops which can be abutted.

2. The grand joint of high landscape dining chair for children as claimed in claim 1, wherein: the two side plates of the mask are attached to partial area of the base shell from the outer sides, two ends of the steel pin are clamped in the two side plates, protruding strips and straight grooves which can be correspondingly buckled in are arranged on the inner sides of the side plates of the mask and the outer sides of the side plates of the base shell, and the big rivets are continuously connected with the center holes of the two side plates of the mask in a penetrating mode and then riveted.

3. The grand joint of high landscape dining chair for children as claimed in claim 2, wherein: the round steel sleeves pass through the center holes of the two side plates of the mask, the center holes of the two side plates of the base shell, the center holes of the two side plates of the inner shell, the center holes of the two side plates of the core frame and the long waist holes at the two sides of the middle section of the key tube, and the large rivets are riveted after penetrating through the round steel sleeves.

Technical Field

The invention relates to a child dining chair article, namely a child high-landscape dining chair large joint.

Background

In the children's product industry, the term "high-profile" dining chair generally refers to a dining chair with legs (legs) of more than 1 meter. In order to fully guarantee the safety of children on the high-landscape dining chair, China has compulsory regulations on the safety of dining chair products, the compulsory standard requirements of European Union are more strict, and the following can be calculated according to the corresponding standard of the European Union: the pressure born by the intersection of the upper ends of the front leg rod and the rear leg rod of the high landscape dining chair is not less than 1000N, and the pressure born by each wheel foot is not less than 200N.

As seen in the current market (such as many online shopping malls), the stress safety of some dining chair products in China is difficult to detect through national standards. In order to improve the safety in use and reduce the shaking in a use state, some domestic high-landscape dining chairs usually adopt a simplified method of not installing casters or installing 2 casters at most on one side of the front and the back of the dining chair (namely, only at the lower ends of two front legs or only at the lower ends of two back legs), so that the daily movement of the dining chair in a room is very convenient; in order to meet the national standard requirements of some dining chair products, a gear meshing structure controlled by the unfolding state of the dining chair is placed in the joint of a front leg rod and a rear leg rod at the upper part of the dining chair, but the tolerance of a plastic gear, namely the safety in long-term use is questioned; in order to try to reach national standard or European standard, steel pull (support) iron and the like are additionally arranged between a front leg rod and a rear leg rod of the high-landscape dining chair, when the dining chair is unfolded for use, the steel pull iron is buckled near the middle upper parts of the front leg rod and the rear leg rod, and forms a firm stress triangle with the front leg rod and the rear leg rod; when the dining chair is not used, the buckling connection of one end of the steel pull iron on the leg rod is removed, the use of the dining chair is obviously simple and convenient enough after the steel pull iron is folded by secondary operation, and the whole product is not simple and beautiful enough. The folding state of the high landscape dining chairs is not locked, the high landscape dining chairs are usually erected along the wall when the high landscape dining chairs are not used, and the carrying is inconvenient in the process of carrying, and the products can be unfolded by self when any leg rod is carried.

Disclosure of Invention

The invention aims to provide a child dining chair large joint which is fully safe in a use state, self-locked in a folding state when not used, unfolded to enter a use state and fully and conveniently folded when not used.

The design scheme for achieving the purpose of the invention is as follows: the child high-landscape dining chair large joint is respectively arranged on the left side and the right side of the dining chair, the large joint on each side comprises a base shell and an inner shell which are inserted and connected by the upper ends of a front leg rod and a rear leg rod of the side, and also comprises a core frame and a key tube, the key tube is inserted in a guide tube of the core frame, the core frame is positioned in the inner shell and is riveted and fixed on the inner shell, the base shell on the outer side is partially overlapped and connected with the inner shell on the inner side, a steel pin is penetrated and connected with round holes on the two sides of the center tube, long waist holes of two side plates of the core frame and long waist holes of two side plates of the inner shell, and double hook holes with the two ends penetrating through the two side plates of the base shell, the straight sections of the two ends of the double hook holes are positioned on a circle radius taking the center hole of the base shell as the circle center, the arc section of the double hook holes is positioned on a circle taking the center hole of the base shell as the circle center, a large rivet passes through the long waist holes, the large rivet is used as a rotation center, and the peripheries of the base shell and the inner shell are provided with table tops which can be abutted.

The two side plates of the mask are attached to partial area of the base shell from the outer sides, two ends of the steel pin are clamped in the two side plates, protruding strips and straight grooves which can be correspondingly buckled in are arranged on the inner sides of the side plates of the mask and the outer sides of the side plates of the base shell, and the big rivets are continuously connected with the center holes of the two side plates of the mask in a penetrating mode and then riveted.

The round steel sleeves pass through the center holes of the two side plates of the mask, the center holes of the two side plates of the base shell, the center holes of the two side plates of the inner shell, the center holes of the two side plates of the core frame and the long waist holes at the two sides of the middle section of the key tube, and the large rivets are riveted after penetrating through the round steel sleeves.

In the big joint of the high landscape dining chair: the rivet includes a tube, a core frame, an inner shell, a base shell and a face mask; secondly, the big rivet passes through the vertical long waist hole of the key pipe, so the key pipe can move up and down relative to the big rivet, namely the key pipe can move up and down relative to the core frame, the inner shell, the base shell and the face mask, and the moving stroke of the big rivet is related to the distance from the contact point of the lower end of the long waist hole and the big rivet (when the key pipe goes up) to the contact point of the upper end of the long waist hole and the big rivet (when the key pipe goes down); when the key tube moves up and down, the steel pin penetrating through the round hole at the upper part of the key tube moves in the straight section at the double-hook hole ends of the two side plates of the base shell, obviously, the up-and-down movement of the steel pin is limited between the upper end and the lower end of the long waist holes of the two side plates of the core frame and between the upper end and the lower end of the long waist holes of the two side plates of the inner shell; the movement of the steel pin in the arc sections of the double hook holes of the two side plates of the base shell corresponds to the relative unfolding (i.e. unfolding of the dining chair) and the relative folding (i.e. folding) of the front leg rod and the back leg rod of the dining chair.

This design high view dining chair major joint's theory of operation and operation of using:

the four corners of the chair of the dining chair are connected with the 4 leg rods, the upper ends of the front leg rods and the rear leg rods on the left side and the right side of the dining chair are respectively inserted into one large joint, and when the high landscape dining chair is in an unfolded use state, the front leg rods and the rear leg rods on each side form a proper (acute) included angle, so that the dining chair can stably stand on the ground. Obviously, although the weight of the child and the weight (gravity) of each component of the dining chair are finally transmitted to the ground, the stress convergence point and fulcrum of the upper ends of the front and rear leg rods are large joints in order to keep the structural integrity and stable state of the dining chair and ensure the safety of the child on the high chair (i.e. the dining chair does not collapse under the heavy pressure), so the large joints are important and critical for the dining chair.

Because the upper ends of the left front and rear leg rods and the upper ends of the right front and rear leg rods are respectively inserted into the base shell (blind hole) and the inner shell (blind hole) on the side, the areas of the base shell and the inner shell are partially overlapped and inserted, and are riveted by the big rivets (together with the core frame and the key tube), on the premise that the big rivets are used as rotating and stress centers, the table boards on the periphery of the base shell and the inner shell at the moment are abutted (matched with the big rivets) and the pressure at the intersection of the upper ends of the front and rear leg rods, which is caused by the weight and the activity of the child on the seat of the dining chair, is fully and reliably born (finally, the pressure is conducted to the.

When the dining chair is unfolded for use, two ends of a steel pin transversely connected with the upper end of the key pipe in a penetrating way are positioned at the lower bottom of the straight section of the double-hook hole, and the steel pin cannot move left and right under the clamping of the straight section of the double-hook hole; the extension state of a compression spring between the lower bottom surface inside the key pipe and the big rivet pushes the lower bottom surface of the key pipe to keep away from the tendency of the big rivet, and the steel pin is limited by the round hole of the key pipe and cannot move upwards; therefore, the front and rear legs of the chair cannot be folded relative to each other, i.e. the chair is fully stable in the unfolded use condition.

Secondly, if no children need to use the dining chair, the left and right fingers of an operator push up the lower bottom ends of the key tubes of the left and right big joints of the dining chair (the spring is compressed by the applied pressure), namely, the steel pin inserted in the round hole at the upper part of the key tube transversely is pushed to move upwards, when the steel pin of the left and right big joints reaches the intersection point of the straight section and the arc section of the double hook holes of the two side plates of the base shell, the operator pushes the front and the back leg rods to fold by the legs or the feet (the pushing force of the fingers on the key tube is removed later), so that the steel pin moves in the arc section of the double hook holes (the spring at the lower part of the key tube still keeps compressed in the process), and when the intersection point of the straight section and the arc section at the other end of the double hook holes is reached, the originally compressed spring in the cavity at the lower part of the key tube is released by the elasticity, the big rivet as the stressed pivot point pushes the key tube to move downwards until the upper end of the long waist hole of the key tube is blocked by the big rivet, and the steel pin traversing in the round hole, the steel pin is clamped by the straight section of the double-hook hole again and cannot move left and right, and the steel pin does not move upwards under the power, namely the completely folded state of the dining chair is automatically locked.

Thirdly, when the dining chair needs to be unfolded again, the lower bottom ends of the key tubes of the left and right large joints of the dining chair are pushed upwards again by the fingers of the left and right hands of an operator (the compression spring is compressed) to push the steel pin transversely inserted into the round hole at the upper part of the key tube to move upwards, when the steel pin reaches the intersection point of the straight section and the arc section of the double hook holes of the two side plates of the base shell, the operator separates the front leg rod and the rear leg rod by the hand or foot force (when the end part of the steel pin completely enters the arc section of the double hook holes, the upward pushing force of the fingers on the key tube is removed), so that the steel pin moves towards the other end in the arc section of the double hook holes (the compression spring at the lower part in the key tube is still in a compressed state in the process), until the straight section and the arc section at the other end of the double hook holes are reached by the steel pin, on one hand, the table tops at the peripheries of the base shell and the, on the other hand, the originally continuously pressed compression spring in the cavity at the lower part of the key tube releases the rebound force, the big rivet is used as a stress fulcrum to push the key tube to punch downwards, when the upper end of the long waist hole of the key tube is blocked by the big rivet, the steel pin which passes through the round hole at the upper part of the key tube is just driven to the bottom point of the straight section at the other end of the double-hook hole, the steel pin is clamped by the straight section of the double-hook hole at the moment and cannot move left and right or move upwards by self, and the completely unfolded state of the dining chair to be used is automatically locked.

The assembly of the large joint of the high landscape dining chair (the assembly of the large joint at one side is taken as an example below):

firstly, a compression spring is arranged in a key tube;

secondly, inserting the health care pipe (with a compression spring) into the core frame guide pipe from top to bottom, and hanging the side lugs at two sides of the upper port of the health care pipe on the upper port of the guide pipe (namely the health care pipe cannot leak from the core frame guide pipe);

thirdly, the core frame (with the key pipe and the compression spring) is arranged in the inner shell, and a plurality of (such as 2-4) short rivets are used for fixing the core frame and the inner shell, so that the core frame and the inner shell are integrated;

inserting the inner shell (with the core frame, the health tube and the compression spring) into the base shell (the two side plates of the base shell are overlapped outside and the two side plates of the inner shell are overlapped in the inner part), and making the center hole of the base shell and the center hole of the inner shell concentric;

the steel pin is connected with the round hole at the upper part of the key tube, the long waist holes at the upper parts of the two side plates of the core frame and the long waist holes at the upper parts of the two side plates of the inner shell in a penetrating way, and the two ends of the steel pin penetrate through the double hook holes of the two side plates of the base shell;

the two side plates of the face mask are buckled with (large) part area of the base shell from the outer sides, two ends of the steel pin are clamped at the inner side of the face mask, and convex strips and straight grooves arranged on the inner side surfaces of the two side plates of the face mask and the outer side surfaces of the two side plates of the base shell are correspondingly buckled (by means of proper elastic deformation of a shell-shaped structure of the face mask);

seventhly, the round steel is sleeved with the center holes of the two side plates of the surface cover, the center holes of the two side plates of the base shell, the center holes of the two side plates of the inner shell, the center holes of the two side plates of the core frame and the long waist holes at the two sides of the middle part of the key tube (at the moment, the compression spring is positioned between the round steel sleeve and the lower bottom surface of the key tube);

the big rivet penetrates through the round steel sleeve and then is riveted, so that the big rivet actually penetrates through the center holes of the two side plates of the mask, the center holes of the two side plates of the base shell, the center holes of the two side plates of the inner shell, the center holes of the two side plates of the core frame and the long waist holes of the two sides of the middle part of the key tube (the round steel sleeve has proper length, and after the big rivet penetrates through the round steel sleeve and is riveted, the inner shell, the core frame and the key tube combined body can still easily and relatively rotate relative to the base shell);

and ninthly, inserting the blind hole at the lower part of the base shell and the blind hole at the lower part of the inner shell into the upper ends of the front leg rod and the rear leg rod respectively and riveting the upper ends of the front leg rod and the rear leg rod.

The assembly of the large joint on one side of the dining chair is completed.

The assembly method of the large joints on both sides is completely the same.

The positive effect of this design: under the premise that the large rivet penetrates through the base shell, the inner shell, the core frame and the key tube, the inner shell and the core frame are riveted, the key tube is inserted into the core frame guide tube, and the large rivet is used as a rotation center when the dining chair is unfolded and folded, the pressure convergence of the upper ends of the front leg rod and the rear leg rod in use of the dining chair is counteracted by utilizing the abutment of the peripheral table-board structures of the base shell and the inner shell, the effect is sufficient and effective, the structure is safe and reliable, and the stress of the dining chair still meets the European Union standard requirement after being tested by 4 trundles; when an operator applies force to the bottom of the key tube by fingers to push the key tube to rise (meanwhile, the spring is compressed) to the end point of the arc section of the double hook holes, the folding state or the unfolding state of the front leg rod and the rear leg rod is unlocked, the upward pushing force of the fingers is removed at the moment, the dining chair can quickly enter the unfolding use state or the folding non-use state and is automatically locked, and the whole-process circulating operation from folding to unfolding and then folding is continuous, smooth and quick; the major components of the large joint are shell structure bodies, the key pipe and the core frame which are used as key structural members are combined in the inner shell, the face mask completely covers the steel pin and the base shell double-hook hole, and the appearance is full and simple.

Drawings

FIG. 1a is a perspective view of a child high-landscape dining chair with large joints of the design, and FIG. 1b is an enlarged view of a part A of the large joints in FIG. 1 a.

Fig. 2a-b are pictorial views of the mask from different viewing angles, and fig. 2c is a cross-sectional view of the mask in the neutral position.

Fig. 3a is a pictorial view of a key tube, and fig. 3b is a longitudinal sectional view of the key tube.

Fig. 4a-b are respectively visual views of the core frame under different viewing angles, and fig. 4c-d are respectively sectional views of the core frame at different cutting positions.

Fig. 5a is a perspective view of the inner case, and fig. 5b is a sectional view of the inner case.

Fig. 6a is a pictorial view of a base shell and fig. 6b is a sectional view of the base shell of fig. 6 a.

Figure 7 is a schematic view of the leg portions of the child dining chair.

Figure 8a is a pictorial view (without the cover) of the large joint of the present design in the unfolded use condition of the dining chair, figures 8b-c are plan views of the base shell and its remaining construction, respectively, from the construction of figure 8a, figure 8d is a pictorial view of the remaining construction of figure 8c without the inner shell, and figure 8e is a sectional view taken from the position a-a of figure 8 d.

Fig. 9a is a schematic view showing the macro-joint state of the design when the dining chair is converted from the unfolded state to the unfolded state, fig. 9b is a schematic view showing the relative positions of the key tube, the steel pin and the inner shell in fig. 9a, fig. 9c is a schematic view showing the relative positions of the steel pin and the double hook hole of the base shell in fig. 9a, and fig. 9d is a longitudinal sectional view showing the middle position of the core frame in the state shown in fig. 9 a.

Fig. 10a is a schematic diagram of the position evolution of the steel pin in the arc section of the double hook hole of the base shell, and fig. 10b is a schematic diagram of the position evolution of the steel pin in the whole range of the double hook hole of the base shell.

Figure 11a is a schematic view of the big joint of the design in a folded and locked state of the dining chair, figure 11b is a partially enlarged view of figure 11a, and figure 11c is an exploded view of the big joint shown in figure 11 a.

Figure 12a is a schematic view of a base shell different from that of figure 6a, figure 12b is a schematic view of an inner shell different from that of figure 5a, figure 12c is a plan view of the base shell of figure 12a, figure 12d is a plan view of the inner shell of figure 12b, and figure 12e is a plan view of the macro-joint (without the mask) of the design assembled with the base and inner shells of figures 12a-b in an unfolded use condition of the dining chair.

Detailed Description