CN111734101A - Folding working table - Google Patents

Abstract

A folding workbench comprises a workbench surface and a support leg, wherein the upper end of the support leg is supported and hinged at two ends of the length direction of the workbench surface, the workbench surface consists of a left workbench surface and a right workbench surface, a pair of locking mechanisms is arranged between the left workbench surface and the right workbench surface, each locking mechanism comprises a first hinge plate, a second hinge plate, a lock pin guide seat, a lock pin and an elastic part, the first hinge plate and the second hinge plate are hinged with each other around a hinge point, the first hinge plate and the second hinge plate are respectively symmetrical and horizontally provided with positioning holes at two sides of the hinge point, the lock pin guide seat is provided with a guide hole, and the lock pin penetrates through the guide hole and then is matched with the positioning hole; the elastic piece provides reset power for the lock pin. This scheme is through setting up a pair of locking mechanical system between the left mesa of workstation and right mesa, also increases folding workstation's symmetry stationarity when increasing mesa length, and folding, expansion are more nimble, smooth and easy, and the unblock is convenient, can the automatic locking, and structural strength is high, ensures safety in utilization, stability.

Description

Folding working table

Technical Field

The invention relates to a small workbench (or called an operation table or an operation table) such as a car washing table, a foot stand table, a mini scaffold and the like, in particular to a folding workbench with a foldable table top.

Background

In daily life and work, small-sized work tables (or operation tables and operation tables) are common, and the use occasions are more, such as car washing tables special for car washing, household mini scaffolds and the like. The most direct effect of using the operating platform is to make the climbing operation easy and convenient, and bring convenience to the life and work of people, and the operating platform is usually composed of a table top and supporting legs.

In the prior art, the table top part of the workbench is still in a traditional flat plate shape, and the workbench is fixed in length, incapable of stretching and difficult to fold. In practical use, different use occasions have different requirements on the length of the table top of the workbench: when the mini scaffold is elevated in a household, the mini scaffold is generally operated at one position, the table top of the workbench does not need to be too large, and the overlarge scaffold occupies space and increases cost; when the car washing platform is used, the platform surface needs to be designed to be longer due to the longer car body, so that people can move left and right on the workbench, and the trouble of moving the workbench after the workbench is lowered is avoided. Therefore, the existing work tables are designed for specific use occasions when leaving factories, and have poor universality, and the main requirements of consumers on products such as household ladders, work tables and the like at present are strong universality, wide application range, small volume and portability. Although the folding table top belongs to common technologies in other fields, the folding table top cannot be generalized due to the use scene of the workbench and the particularity of the structure of the workbench.

Therefore, the applicant researches and designs an operating table with a telescopic table top aiming at the defects, applies for a Chinese patent with a publication number of "CN 2875722Y" (patent name of 'an eccentric swing rod positioning type telescopic table top operating table', patent number of "CN 200620069181.4", hereinafter referred to as a comparison document), and refers to the attached drawings 6 and 7 of the comparison document, the operating table comprises a table top 1 and a supporting column foot 2, the table top 1 consists of a left table top 3 and a right table top 4, and the inner ends of the left table top 3 and the right table top 4 are mutually nested and slidably connected. In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: 1. when the telescopic table top operating platform is used for telescopic operation, the operation can be carried out only on one side of the operating platform, and the telescopic table top operating platform is limited by a specific position and is not convenient for telescopic operation in some occasions; 2. in order to ensure the shrinkage, a gap is left between the left table top and the right table top of the telescopic table top, and the table top is uneven due to the large sleeve and the small sleeve.

In view of this, how to solve the problems of inconvenient operation, uneven table top and the like in the prior art is a subject to be researched and solved by the present invention.

Disclosure of Invention

The invention provides a folding workbench, and aims to solve the problems of inconvenient operation, uneven table top and the like, so that the workbench can be conveniently and quickly folded and unfolded, and the symmetrical and consistent table top and the convenient storage are ensured.

In order to achieve the purpose, the invention provides a folding workbench which comprises a workbench surface and a support leg, wherein the upper end of the support leg is supported and hinged at two ends of the length direction of the workbench surface, the workbench surface consists of a left workbench surface and a right workbench surface, the left workbench surface and the right workbench surface are provided with lower surfaces, a pair of locking mechanisms are arranged between the lower surfaces of the left workbench surface and the right workbench surface, each locking mechanism is respectively arranged at two sides of the width direction of the workbench surface, and each locking mechanism comprises a first hinge plate, a second hinge plate, a lock pin guide seat, a lock pin and an elastic piece;

one of the left table top and the right table top fixes the first hinge plate, and the other fixes the second hinge plate, wherein the first hinge plate is positioned at the inner side of the second hinge plate in the width direction of the table top; the first hinge plate and the second hinge plate are hinged with each other around a hinge point, and the connecting line of the hinge points in the two locking mechanisms is positioned on the same horizontal straight line in the width direction of the table top so as to form the folding and unfolding of the left table top and the right table top; the first hinge plate and the second hinge plate are respectively symmetrical and horizontally provided with positioning holes at two sides of a hinge point;

the lock pin guide seat is fixedly arranged on one of the left table top and the right table top and is positioned on the inner side of the first hinge plate on the table top; the lock pin guide seat is provided with a guide hole, and the axis of the guide hole is parallel to the axis of the positioning hole on the first hinge plate and the second hinge plate;

the lock pin penetrates through the guide hole of the lock pin guide seat and then is matched with the positioning holes in the first hinge plate and the second hinge plate to form a locking state of the locking mechanism; the lock pin penetrates through the guide hole of the lock pin guide seat and then is separated from the positioning hole in the second hinge plate and matched with the positioning hole in the first hinge plate to form an unlocking state of the locking mechanism; the lock pin is provided with a first limiting part for limiting the outward movement of the lock pin and a second limiting part for limiting the inward movement of the lock pin;

aiming at the first limiting part, a first axial limiting surface is arranged on one of the first hinge plate, the second hinge plate or the lock pin guide seat, under the locking state, the first limiting part is in contact fit with the first axial limiting surface to limit the position of the lock pin moving outwards on the axis of the guide hole relative to the lock pin guide seat, and at the moment, the lock pin penetrates through the positioning hole in the first hinge plate and then enters the positioning hole in the second hinge plate, so that the first hinge plate and the second hinge plate are relatively fixed;

aiming at the second limiting part, a second axial limiting surface is arranged on the lock pin guide seat, and in an unlocking state, the second limiting part is in contact fit with the second axial limiting surface to limit the position of the lock pin moving inwards on the axis of the guide hole relative to the lock pin guide seat, and at the moment, the lock pin is separated from the positioning hole on the second hinge plate and is positioned in the positioning hole on the first hinge plate, so that the first hinge plate and the second hinge plate can be rotatably hinged;

the elastic part provides reset power towards the direction of the positioning hole for the lock pin, is positioned and connected to the lock pin and acts on the width direction of the lock pin, which is horizontal to the table top; the lock pin is provided with a front end face which is used for abutting against the elastic piece, and the front end face faces the inner side of the table top; the lock pin guide seat is provided with a rear end face corresponding to the front end face and used for abutting against the elastic piece, and the orientation of the rear end face is opposite to that of the front end face.

Furthermore, in order to enable the specification and the size of the locking mechanisms to be uniformly equipped, the pair of locking mechanisms are symmetrically or specularly arranged along the central line of the width direction of the lower surface of the table top, so that the symmetrical stability of the folding workbench is improved.

Furthermore, in order to prevent the bearing capacity of the table top from being weakened due to the adoption of a folding structure and ensure that a user can still stand and walk on the table top stably and firmly, the first hinge plate is provided with a first hinge part and a first fixing part, the first hinge part is symmetrically provided with a first positioning hole and a second positioning hole which are communicated at two sides of a hinge point, the circle centers of the first positioning hole and the second positioning hole and the hinge point are positioned on the same horizontal plane, and the first fixing part is fixedly arranged on the right table top; the second hinge plate is provided with a second hinge part and a second fixing part, the second hinge part is symmetrically provided with a third positioning hole and a fourth positioning hole at two sides of a hinge point, the centers of circles of the third positioning hole and the fourth positioning hole and the hinge point are positioned on the same plane, and the second fixing part is fixedly arranged on the left table top; when the left table top and the right table top are folded, the axes of the first positioning hole and the third positioning hole are overlapped, and the axes of the second positioning hole and the fourth positioning hole are overlapped; when the left table top and the right table top are unfolded, the axes of the first positioning hole and the fourth positioning hole are overlapped, the axes of the second positioning hole and the third positioning hole are overlapped, and the first fixing part and the second fixing part are abutted against each other; and the hinge joint of the first hinge plate and the second hinge plate is riveted by a rivet.

Furthermore, in order to enable the lock pin to be faster and smoother when the locking state and the unlocking state are switched, the axis of the guide hole is overlapped with the axis of the first positioning hole in the first hinge plate, so that the lock pin vertically penetrates through the guide hole and the positioning hole.

Furthermore, in order to enable the guide function of the guide hole in the lock pin guide seat to be more direct and facilitate the mutual matching with the lock pin, the elastic part and other components, the lock pin guide seat comprises a bottom plate, a first support plate and a second support plate, the bottom plate is fixedly installed on the same one of the left table top and the right table top, the first support plate and the second support plate are arranged perpendicular to the bottom plate, the first support plate is located at a position close to the first hinge plate, the first support plate is located at a position far away from the first hinge plate, the first support plate and the second support plate are respectively provided with the guide hole, and the axes of the two guide holes are overlapped; the rear end face is positioned on the side face of the second support plate facing the outer side of the table top, the first axial limiting face is positioned on the side face of the first support plate facing the inner side of the table top, and the second axial limiting face is positioned on the side face of the first support plate facing the outer side of the table top.

Furthermore, in order to better control the distance between the lock pin moving towards the outer side and the inner side, the first limiting part and the second limiting part are better matched with other parts, the first limiting part and the second limiting part are snap springs, a first clamping groove and a second clamping groove are formed in the lock pin, and the first limiting part and the second limiting part are respectively positioned and installed on the first clamping groove and the second clamping groove.

Furthermore, in order to enable the reset spring to better provide reset power towards the direction of the positioning hole for the lock pin, the front end face is arranged on the first limiting part and faces towards the side face of the inner side of the table board, meanwhile, the elastic part adopts the reset spring, and the reset spring is sleeved on the lock pin.

Furthermore, the lock pin is provided with a first lock pin and a second lock pin which are arranged in parallel, the first lock pin penetrates through the guide hole and then is connected with the positioning hole in a matched mode, and the elastic piece is sleeved on the first lock pin.

Furthermore, in order to make the operation of the user more convenient and the unlocking easier, a handle is arranged on the lock pin, and an anti-skid groove is arranged on the handle.

The invention is explained below:

1. in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, coupled between two elements, or coupled in any other manner that does not materially affect the operation of the device, unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

2. In the present invention, the terms "first", "second", "third", "fourth", etc. 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.

3. In the present invention, the terms "center", "length", "width", "left", "right", "bottom", "inner", "outer", and the like indicate orientations or positional relationships that are based on the orientations or positional arrangements shown in the drawings, and are only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

4. In the present invention, the "outer side" and the "inner side" are relative to the positional relationship between the lock pin and the positioning hole in the width direction of the lower surface of the table top, the direction of the lock pin toward the positioning hole is the "outer side", and the inner side of the "inner side" is the opposite direction of the outer side.

Due to the application of the scheme, compared with the prior art, the invention has the following advantages and effects:

1. according to the scheme, the pair of locking mechanisms is arranged between the left table top and the right table top of the workbench, the workbench can be flatly laid and unfolded in a use state, and can be folded and stored when not in use, so that the workbench is high in universality and applicable to multiple occasions.

2. According to the scheme of the invention, through the innovative design of the locking mechanism, the lock pin is fixed on the lock pin guide seat, the lock pin can only do reciprocating motion vertical to the lock pin guide seat, and meanwhile, the lock pin is provided with the first limit part and the second limit part, so that the lock pin, the first hinge plate and the second hinge plate can be in different matching, namely an unlocking state and a locking state, skillfully by applying the structure; meanwhile, after the first hinge plate and the second hinge plate rotate by a certain angle in an unlocking state, the lock pin can be abutted against the second hinge plate to slide with the second hinge plate, and after the first hinge plate and the second hinge plate are folded in place or unfolded in place, corresponding positioning holes are overlapped, so that the lock pin automatically enters the positioning holes of the second hinge plate under the action of the elastic piece, the automatic locking of the left table top and the right table top is realized, the instability of the table top during unfolding use is avoided, the stability of the table top is improved, the shaking of a user during standing and walking is avoided, the folding workbench is still stable and firm, and the elastic piece enables the automatic locking of the lock pin to be more convenient and safer.

3. According to the scheme, the folding workbench is unfolded or folded by adopting the locking mechanism, and the profiles of the left table top and the right table top are symmetrical and consistent by matching the first hinge plate, the second hinge plate, the lock pin guide seat, the lock pin and the elastic piece, so that the material pressure of different profiles during production is reduced, and the symmetrical stability of the folding workbench is improved.

4. In the scheme of the invention, the mode of folding and adding the locking mechanisms is adopted, the use length of the table top is increased, and meanwhile, the structural strength, the use safety and the use stability of the hinged structures are ensured, wherein when the table top is unfolded and the locking mechanisms are in the locking state, the lock pin in each locking mechanism penetrates through two pairs of positioning holes which are formed in the second hinge plate and are overlapped with the second hinge plate, so that the hinged connection between the second hinge plate and the second hinge plate is firmer, and the load capacity between the left table top and the right table top in the unfolding and locking state is increased.

5. According to the scheme, when the folding or unfolding operation is carried out, the operation of personnel during the operation is more convenient, the outward end of the lock pin can be abutted against the second hinge plate after the lock pin rotates for a certain angle in an unlocking state, no external force is applied to the lock pin when the left table top and the right table top rotate, and a transition stage exists during the folding and unfolding; and the user is not restricted to only can carry out the unblock in one side of workstation, and folding operation of workstation is more convenient, can fold up the operation in both sides around the workstation, and the user of being convenient for uses under the different use scenes.

Drawings

FIG. 1 is a schematic perspective view of a fully unfolded state of a folding work bench according to an embodiment of the present invention;

FIG. 2 is a front perspective view of a folding work bench of an embodiment of the present invention in a folded state;

FIG. 3 is a schematic perspective view of the folding table according to the embodiment of the present invention in a fully retracted state;

FIG. 4 is a schematic reverse perspective view of a folding embodiment of the folding work bench support legs of the present invention in a folded configuration;

FIG. 5 is a perspective view of a pair of locking mechanisms engaged in a folding work bench according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of the locking mechanism of FIG. 5 positioned on one side of the deck in the width direction;

FIG. 7 is a perspective view of the locking mechanism of FIG. 5 on the other side of the deck in the width direction;

FIG. 8 is an exploded assembly view of the locking mechanism in the folding work bench of the embodiment of the present invention;

FIG. 9 is a schematic plan view of an unlocked state of a locking mechanism in a folding work bench according to an embodiment of the present invention;

FIG. 10 is an enlarged partial schematic view of FIG. 9;

FIG. 11 is a schematic plan view of a locking mechanism in a folding work bench according to an embodiment of the present invention;

FIG. 12 is a schematic perspective view of a folded workbench according to an embodiment of the present invention in an unfolded and unlocked state;

FIG. 13 is a schematic perspective view of a folding stage according to an embodiment of the present invention in an unlocked state;

FIG. 14 is a perspective view of the folding work bench of the present invention showing the platform in an unfolded and locked position;

fig. 15 is a perspective view of the folding stage of the present invention in a folded and locked position.

The drawings are shown in the following parts:

1. a table top; 11. a left table top; 12. a right table top;

2. a pillar foot;

3. a locking mechanism;

31. a first hinge plate; 311. a first hinge portion; 3111. a first positioning hole; 3112. a second positioning hole; 312. a first fixed part;

32. a second hinge plate; 321. a second hinge portion; 3211. a third positioning hole; 3212. a fourth positioning hole; 322. a second fixed part;

33. a lock pin guide seat; 331. a guide hole; 332. a base plate; 333. a first support plate; 334. a second support plate;

34. a lock pin; 341. a first lock pin; 3411. a first card slot; 3412. a second card slot; 342. a second lock pin;

35. an elastic member;

36. a handle; 361. an anti-slip groove;

37. riveting;

4. a first limiting part; 5. a second limiting part;

6. a first axial limiting surface; 7. a second axial limiting surface;

8. a front end face; 9. a rear end face.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1 to 15, the folding workbench according to the embodiment of the present invention includes a workbench 1 and a pillar base 2, the upper end of the pillar base 2 is supported and hinged at two ends of the length direction of the workbench 1, the workbench 1 is composed of a left workbench 11 and a right workbench 12, a pair of locking mechanisms 3 is disposed between the left workbench 11 and the right workbench 12, the pair of locking mechanisms 3 is symmetrically or mirror-symmetrically disposed along the width direction of the workbench 1, each locking mechanism 3 includes a first hinge plate 31, a second hinge plate 32, a lock pin guide seat 33, a lock pin 34, an elastic member 35, and a handle 36;

in both of the left deck 11 and the right deck 12, one fixes the first hinge plate 31 and the other fixes the second hinge plate 32, the first hinge plate 31 being located inside the second hinge plate 32 in the width direction of the deck 1; the first hinge plate 31 and the second hinge plate 32 are hinged with each other around a hinge point, and the connecting line of the hinge points in the two locking mechanisms 3 is positioned on the same horizontal straight line in the width direction of the table top so as to form the folding and unfolding of the left table top 11 and the right table top 12 and minimize the occupied space of the folded table top 1; the hinge point of the first hinge plate 31 and the second hinge plate 32 is riveted through a rivet 37 in a rotatable manner; the first hinge plate 31 and the second hinge plate 32 are respectively symmetrically arranged at two sides of a hinge point and are horizontally provided with positioning holes;

the lock pin guide seat 33 is fixedly installed on one of the left table top 11 and the right table top 12 and is positioned on the inner side of the first hinge plate 31 on the table top 1; the lock pin guide seat 33 is provided with at least two guide holes 331 in the direction parallel to the width direction of the table top 1, and the axes of the guide holes 331 are parallel to the axes of the positioning holes on the first hinge plate 31 and the second hinge plate 32;

the lock pin 34 passes through the guide hole 331 of the lock pin guide seat 33 and then is matched with the positioning holes on the first hinge plate 31 and the second hinge plate 32 to form the locking state of the locking mechanism 3; the lock pin 34 passes through the guide hole 331 of the lock pin guide seat 33 and then is separated from the positioning hole on the second hinge plate 32 and is matched with the positioning hole of the first hinge plate 31 to form an unlocking state of the locking mechanism 3;

the elastic piece 35 provides a reset power towards the positioning hole direction for the lock pin 34, and the elastic piece 35 is positioned and connected to the lock pin 34 and acts on the lock pin 34 in the width direction horizontal to the table top 1; the lock pin 34 is provided with a front end surface 8 for abutting against the elastic piece 35, and the front end surface 8 faces towards the inner side of the table board 1; a rear end face 9 which is used for abutting against the elastic piece 35 is arranged on the lock pin guide seat 33 corresponding to the front end face 8, and the direction of the rear end face 9 is opposite to that of the front end face 8;

the lock pin 34 is provided with a first limit part 4 for limiting the outward movement of the lock pin 34 and a second limit part 5 for limiting the inward movement of the lock pin 34; for the first limit part 4, a first axial limit surface 6 is arranged on one of the first hinge plate 31, the second hinge plate 32 or the lock pin guide seat 33, the first limit part 4 is in contact fit with the first axial limit surface 6 to limit the position of the lock pin 34 moving outwards on the axis of the guide hole 331 relative to the lock pin guide seat 33, and at the moment, the lock pin 34 penetrates through the positioning hole in the first hinge plate 31 and then enters the positioning hole in the second hinge plate 32, so that the first hinge plate 31 and the second hinge plate 32 are relatively fixed; for the second limiting part 5, a second axial limiting surface 7 is arranged on the lock pin guide seat 33, the second limiting part 5 is in contact with the second axial limiting surface 7 to cooperate with the second axial limiting surface 7 to limit the position of the lock pin 34 moving inwards on the axis of the guide hole 331 relative to the lock pin guide seat 33, and at the moment, the lock pin 34 is separated from the positioning hole on the second hinge plate 32 and is positioned in the positioning hole on the first hinge plate 31, so that the first hinge plate 31 and the second hinge plate 32 can be hinged in a rotating mode.

By implementing the above embodiment, the folding table has a locked state and an unlocked state when in use, and the two states are described below:

in the locked state, referring to fig. 11, 14 and 15, the lock pin 34 penetrates through the positioning hole on the first hinge plate 31 and then enters into the positioning hole of the second hinge plate 32, so that the positions of the first hinge plate 31 and the second hinge plate 32 are fixed, the elastic force provided by the elastic member 35 ensures that the lock pin 34 does not disengage from the positioning hole of the second hinge plate 32, at this time, the first limiting portion 4 is in contact with the first axial limiting surface 6 to cooperate with the first axial limiting surface to limit the position of the lock pin 34 moving outwards on the axis of the guide hole 331 relative to the lock pin guide seat 33, and at this time, the left table 11 and the right table 12 can be in the unfolded state or the folded state;

in an unlocked state, referring to fig. 9, 10, 12 and 13, a force in an opposite direction and greater than the elastic force of the elastic member 35 is applied to the lock pins 34 at the two ends, so that the lock pins 34 can be disengaged from the positioning holes of the second hinge plate 32, the first hinge plate 31 and the second hinge plate 32 are in a rotatable and unlocked position, the lock pins 34 are disengaged from the positioning holes of the second hinge plate 32, and at this time, the second limiting portion 5 is in contact with the second axial limiting surface 7 to limit the position of the lock pins 34 moving inward on the axis of the guide holes 331 relative to the lock pin guide seat 33, so as to prevent the lock pins 34 from disengaging from the positioning holes of the first hinge plate 31; the table top 1 can be folded and unfolded in an unlocked state, a transition stage is provided during folding and unfolding, at the moment, the rotation of the left table top 11 and the right table top 12 causes the positions of the positioning holes on the first hinge plate 31 and the second hinge plate 32 to relatively deviate, when no external force is applied to the lock pin 34, the outward end of the lock pin 34 can be abutted against the second hinge plate 32, although the force exerted by the elastic piece 35 on the lock pin 34 is delayed when the left table top 11 and the right table top 12 are rotated, the force is not strong, and a general user can easily fold and unfold the left table top 11 and the right table top 12.

In the embodiment of the invention, as shown in fig. 4 and 5, the pair of locking mechanisms 3 are symmetrically or mirror-image arranged along the center line of the width direction of the lower surface of the table top 1, and if symmetrically arranged, the specifications and sizes of the pair of locking mechanisms 3 can be uniformly configured, so that the material pressure during production is reduced, the symmetrical stability of the folding workbench is increased, and the operation of personnel during operation is more convenient.

In the embodiment of the present invention, as shown in fig. 8, the first hinge plate 31 has a first hinge portion 311 and a first fixing portion 312, the first hinge portion 311 is symmetrically provided with a first positioning hole 3111 and a second positioning hole 311 at two sides of a hinge point, the centers of the first positioning hole 3111 and the second positioning hole 311 and the hinge point are located on the same horizontal plane, and the first fixing portion 312 is fixedly mounted on the right table top 12; the second hinge plate 32 is provided with a second hinge portion 321 and a second fixing portion 322, the second hinge portion 321 is symmetrically provided with a third positioning hole 3211 and a fourth positioning hole 3212 at two sides of a hinge point, the third positioning hole 3211 and the fourth positioning hole 3212 are located on the same plane with the circle center of the hinge point, and the second fixing portion 322 is fixedly mounted on the left table top 11; when the left table top 11 and the right table top 12 are folded, the axes of the first positioning hole 3111 and the third positioning hole 3211 are overlapped, and the axes of the second positioning hole 311 and the fourth positioning hole 3212 are overlapped; when the left table top 11 and the right table top 12 are unfolded, the axes of the first positioning hole 3111 and the fourth positioning hole 3212 are overlapped, the axes of the second positioning hole 311 and the third positioning hole 3211 are overlapped, and the first fixing portion 312 and the second fixing portion 322 are abutted against each other. By adopting the mode, the gap of the table board 1 can be folded when the table board is folded, the occupied space is reduced, the carrying is more convenient, the left table board 11 and the right table board 12 keep the flatness when the table board is unfolded, the lock pin 34 simultaneously passes through the first positioning hole 3111 and the fourth positioning hole 3212, the second positioning hole 311 and the third positioning hole 3211, and the first fixing part 312 and the second fixing part 322 are mutually abutted, so that the bearing capacity of the table board 1 is not weakened due to the adoption of a folding structure, and a user can still stably and firmly stand on the table board 1.

In the embodiment of the present invention, as shown in fig. 8, 9 and 10, in order to make the guiding function of the guiding hole 331 in the lock pin guiding seat 33 more direct and facilitate the cooperation with the lock pin 34, the elastic member 35 and other components, the lock pin guiding seat 33 includes a bottom plate 332 and a first support plate 333 and a second support plate 334, the bottom plate 332 is fixedly installed on the same one of the left table top 11 and the right table top 12, the first support plate 333 and the second support plate 334 are arranged perpendicular to the bottom plate 332, the first support plate 333 is located at a position close to the first hinge plate 31, the first support plate 333 is located at a position far away from the first hinge plate 31, the first support plate 333 and the second support plate 334 are respectively provided with the guiding hole 331, and the axes of the two guiding holes 331 coincide; the rear end face 9 is located on the side surface of the second support plate 334 facing the outside of the table top 1, the first axial limiting face 6 is located on the side surface of the first support plate 333 facing the inside of the table top 1, and the second axial limiting face 7 is located on the side surface of the first support plate 333 facing the outside of the table top 1.

In the embodiment of the present invention, as shown in fig. 8, 9 and 10, in order to better control the distance of the outward movement and the inward movement of the lock pin 34, the first limiting portion 4 and the second limiting portion 5 are better matched with other components, the first limiting portion 4 and the second limiting portion 5 are snap springs, the lock pin 34 is provided with a first locking groove 3411 and a second locking groove 3412, the first limiting portion 4 and the second limiting portion 5 are respectively positioned and installed on the first locking groove 3411 and the second locking groove 3412, the distance of the outward movement and the inward movement of the lock pin 34 is better controlled, the first limiting portion 4 and the second limiting portion 5 are better matched with other components, and the distance between the two snap springs is the limiting distance for limiting the reciprocating movement of the lock pin 34, so that the lock pin 34 is just separated from the positioning hole on the second hinge plate 32 when unlocked, and automatically enters the positioning hole on the second hinge plate 32 when locked, so that the first hinge plate 31 and the second hinge plate 32 are fixed to each other. The first limiting part 4 and the second limiting part 5 adopt clamp springs, production and assembly are facilitated, and installation and fixation of the elastic part 35, the lock pin guide seat 33 and the lock pin 34 are very convenient.

As shown in fig. 9 and 10, in order to make the return spring better provide the lock pin 34 with a return power toward the positioning hole, the axis of the guiding hole 331 coincides with the axis of one of the positioning holes on the first hinge plate 31, so that the lock pin 34 vertically penetrates through the guiding hole 331 and the corresponding positioning hole, meanwhile, the lock pin 34 has two first lock pins 341 and second lock pins 342 arranged in parallel, the first lock pin 341 penetrates through the guiding hole 331 and then is connected with the positioning hole in a matching manner, the front end surface 8 is arranged at the side surface of the first limiting part 4 facing the inner side of the table top 1, and the elastic member 35 is sleeved on the first lock pin 341; the elastic member 35 is a return spring, which contracts and deforms when subjected to an external load, stores deformation energy, and is restored to a state after an external force is removed, and applies an axial force, so that the return spring is substantially coaxial with the lock pin 34 when the return spring is sleeved on the lock pin 34, and the lock pin 34 is coaxial with the guide hole 331 and the positioning hole corresponding to the lock pin 34, and the axial return force provided by the return spring is smoother and smoother.

With respect to the above embodiments, possible variations of the present invention are described below:

1. in the above embodiment, as shown in fig. 4, the first hinge plate 31 is fixed to the left table 11, and the second hinge plate 32 is fixed to the right table 12, but the embodiment of the present invention is not limited to this, and the second hinge plate 32 may be fixed to the left table 11, and the first hinge plate 31 may be fixed to the right table 12, which has the same effect as that shown in fig. 4.

2. In the above embodiments, a pair of the locking mechanisms 3 may be symmetrically or mirror-symmetrically arranged along a central line of the lower surface of the table top 1 in the width direction, and the embodiment of the present invention is not limited to this, and the sizes of the pair of locking mechanisms 3 may be made different, such that one locking mechanism 3 is longer and the other locking mechanism 3 is shorter, which can be understood and accepted by those skilled in the art, and therefore, the related mechanisms will not be described again.

3. In the above embodiment, referring to fig. 10, the first axial direction limiting surface 6 is provided on the first supporting plate 333 of the lock pin guide seat 33, and is located at the side surface of the first supporting plate 333 facing the inside of the table top 1; however, the embodiment of the present invention is not limited thereto, and the first axial limiting surface 6 may be disposed on one of the first hinge plate 31, the second hinge plate 32, or the lock pin guiding seat 33; for example, a side wall that does not penetrate the positioning hole is disposed outside the positioning hole of the second hinge plate 32, and the first limiting portion 4 on the lock pin 34 is located at the outward end of the lock pin 34, so that the outward movement of the lock pin 34 can be limited at this time; for another example, the first axial limiting surface 6 may be disposed on an inward side of the first hinge plate 31, and a protrusion of the lock pin 34 is disposed near the first hinge plate 31 as the first limiting portion 4, so that the movement distance of the lock pin 34 can be limited by the structure when the lock pin moves outward.

4. In the above embodiment, the axis of the guide hole 331 coincides with the axis of the first positioning hole 3111 of the first hinge plate 31, the lock pin 34 is vertically inserted into the guide hole 331 and the positioning hole, the axis of the guide hole 331 may be parallel to the axis of the first positioning hole 3111 of the first hinge plate 31, and a guide direction parallel to the positioning hole may be provided for the lock pin 34, and the lock pin 34 may have a structure in which two first lock pins 341 and two second lock pins 342 are provided in parallel, or another structure.

5. In the above embodiment, the first limiting portion 4 and the second limiting portion 5 are snap springs, but the present invention is not limited thereto, and the lock pin 34 may be provided with other protruding structures to similarly limit the distance control of the outward movement and the inward movement of the lock pin 34.

6. In the above embodiment, the elastic member 35 may be a return spring, or other types of elastic members 35 such as a snap spring, an air spring, etc. that provide the lock pin 34 with a return force toward the positioning hole

7. In the above embodiment, the handle 36 is disposed on the lock pin 34, the anti-slip groove 361 is disposed on the handle 36, which is convenient for being grasped and anti-slip by human hand, and the material of the handle 36 includes but is not limited to plastic, hardware, rubber, wood, etc.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. The utility model provides a folding workbench, includes mesa (1) and pillar foot (2), the upper end support of pillar foot (2) articulates in mesa (1) length direction's both ends, its characterized in that: the table top (1) consists of a left table top (11) and a right table top (12), the left table top (11) and the right table top (12) are provided with lower surfaces, a pair of locking mechanisms (3) are arranged between the lower surfaces of the left table top (11) and the right table top (12), each locking mechanism (3) is respectively arranged on two sides of the width direction of the table top, and each locking mechanism (3) comprises a first hinge plate (31), a second hinge plate (32), a lock pin guide seat (33), a lock pin (34) and an elastic piece (35);

in both the left table top (11) and the right table top (12), one of the left table top and the right table top fixes a first hinge plate (31) and the other of the left table top and the right table top fixes a second hinge plate (32), wherein the first hinge plate (31) is positioned at the inner side of the second hinge plate (32) in the width direction of the table top (1); the first hinge plate (31) and the second hinge plate (32) are hinged with each other around a hinge point, and the connection lines of the hinge points in the two locking mechanisms (3) are positioned on the same horizontal straight line in the width direction of the table top so as to form the folding and unfolding of the left table top (11) and the right table top (12); the first hinge plate (31) and the second hinge plate (32) are respectively symmetrical and horizontally provided with positioning holes at two sides of a hinge point;

the lock pin guide seat (33) is fixedly arranged on one of the left table top (11) and the right table top (12) and is positioned on the inner side of the first hinge plate (31) on the table top (1); the lock pin guide seat (33) is provided with a guide hole (331), and the axis of the guide hole (331) is parallel to the axes of the positioning holes in the first hinge plate (31) and the second hinge plate (32);

the lock pin (34) penetrates through a guide hole (331) of the lock pin guide seat (33) and then is matched with positioning holes in the first hinge plate (31) and the second hinge plate (32) to form a locking state of the locking mechanism (3); the lock pin (34) penetrates through a guide hole (331) of the lock pin guide seat (33) and then is separated from a positioning hole in the second hinge plate (32) and matched with a positioning hole in the first hinge plate (31) to form an unlocking state of the locking mechanism (3); the lock pin (34) is provided with a first limiting part (4) for limiting the outward movement of the lock pin (34) and a second limiting part (5) for limiting the inward movement of the lock pin (34);

aiming at a first limiting part (4), a first axial limiting surface (6) is arranged on one of the first hinge plate (31), the second hinge plate (32) or the lock pin guide seat (33), under a locking state, the first limiting part (4) is in contact fit with the first axial limiting surface (6) to limit the position of the lock pin (34) moving outwards on the axis of the guide hole (331) relative to the lock pin guide seat (33), and at the moment, the lock pin (34) penetrates through a positioning hole in the first hinge plate (31) and then enters a positioning hole in the second hinge plate (32), so that the first hinge plate (31) and the second hinge plate (32) are fixed relatively;

aiming at the second limiting part (5), a second axial limiting surface (7) is arranged on the lock pin guide seat (33), under the unlocking state, the second limiting part (5) is in contact with the second axial limiting surface (7) to cooperate with the second axial limiting surface to limit the position of the lock pin (34) moving inwards on the axis of the guide hole (331) relative to the lock pin guide seat (33), and at the moment, the lock pin (34) is separated from the positioning hole on the second hinge plate (32) and is positioned in the positioning hole on the first hinge plate (31), so that the first hinge plate (31) and the second hinge plate (32) can be rotatably hinged;

the elastic piece (35) provides reset power towards the direction of the positioning hole for the lock pin (34), and the elastic piece (35) is positioned and connected to the lock pin (34) and acts on the width direction of the lock pin (34) which is horizontal to the table top (1); the lock pin (34) is provided with a front end surface (8) used for abutting against the elastic piece (35), and the front end surface (8) faces towards the inner side of the table top (1); a rear end face (9) used for abutting against the elastic piece (35) is arranged on the lock pin guide seat (33) corresponding to the front end face (8), and the direction of the rear end face (9) is opposite to that of the front end face (8).

2. The self-locking device of claim 1, wherein: the pair of locking mechanisms (3) are arranged symmetrically or in a mirror image mode along the center line of the width direction of the lower surface of the table top (1).

3. The self-locking device of claim 1, wherein: the first hinge plate (31) is provided with a first hinge part (311) and a first fixing part (312), the first hinge part (311) is symmetrically provided with a first positioning hole (3111) and a second positioning hole (311) which are communicated at two sides of a hinge point, the circle centers of the first positioning hole (3111) and the second positioning hole (311) and the hinge point are positioned on the same horizontal plane, and the first fixing part (312) is fixedly installed on the right table board (12); the second hinge plate (32) is provided with a second hinge part (321) and a second fixing part (322), the second hinge part (321) is symmetrically provided with a third positioning hole (3211) and a fourth positioning hole (3212) at two sides of a hinge point, the circle centers of the third positioning hole (3211) and the fourth positioning hole (3212) and the hinge point are positioned on the same plane, and the second fixing part (322) is fixedly installed on the left table board (11); when the left table top (11) and the right table top (12) are folded, the axes of the first positioning hole (3111) and the third positioning hole (3211) are overlapped, and the axes of the second positioning hole (311) and the fourth positioning hole (3212) are overlapped; when the left table top (11) and the right table top (12) are unfolded, the axes of the first positioning hole (3111) and the fourth positioning hole (3212) are overlapped, the axes of the second positioning hole (311) and the third positioning hole (3211) are overlapped, and the first fixing part (312) and the second fixing part (322) are abutted against each other; the hinge point of the first hinge plate (31) and the second hinge plate (32) is riveted by a rivet (37).

4. The self-locking device of claim 3, wherein: the axis of the guide hole (331) coincides with the axis of a first positioning hole (3111) on the first hinge plate (31), so that the lock pin (34) vertically penetrates through the guide hole (331) and the positioning hole.

5. The self-locking device of claim 1, wherein: the lock pin guide seat (33) comprises a bottom plate (332), a first support plate (333) and a second support plate (334), the bottom plate (332) is fixedly installed on one of the left table top (11) and the right table top (12), the first support plate (333) and the second support plate (334) are perpendicular to the bottom plate (332), the first support plate (333) is located at a position close to the first hinge plate (31), the first support plate (333) is located at a position far away from the first hinge plate (31), guide holes (331) are respectively formed in the first support plate (333) and the second support plate (334), and the axes of the two guide holes (331) coincide; the rear end face (9) is positioned on the side face of the second support plate (334) facing the outer side of the table top (1), the first axial limiting face (6) is positioned on the side face of the first support plate (333) facing the inner side of the table top (1), and the second axial limiting face (7) is positioned on the side face of the first support plate (333) facing the outer side of the table top (1).

6. The self-locking device of claim 4, wherein: the first limiting part (4) and the second limiting part (5) are clamping springs, a first clamping groove (3411) and a second clamping groove (3412) are formed in the lock pin (34), and the first limiting part (4) and the second limiting part (5) are respectively installed on the first clamping groove (3411) and the second clamping groove (3412) in a positioning mode.

7. The self-locking device according to claim 1 or 6, characterized in that: the front end face (8) is arranged on the side face of the first limiting part (4) facing the inner side of the table top (1).

8. The self-locking device of claim 7, wherein: the elastic piece (35) adopts a return spring which is sleeved on the lock pin (34).

9. The self-locking device of claim 8, wherein: the lock pin (34) is provided with a first lock pin (341) and a second lock pin (342) which are arranged in parallel, the first lock pin (341) penetrates through the guide hole (331) and then is matched and connected with the positioning hole, and the elastic piece (35) is sleeved on the first lock pin (341).

10. The self-locking device of claim 9, wherein: a handle (36) is arranged on the second lock pin (342), and an anti-skid groove (361) is arranged on the handle (36).

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