Linkage woodworking auxiliary instrument

Abstract

The invention belongs to the technical field of wood processing equipment, and particularly relates to a linkage woodworking auxiliary instrument which comprises a working table, mounting supports are arranged below the working table, two sets of supporting foot stools are hinged between the two mounting supports, one set of supporting foot stools are locking foot stools, and the other set of supporting foot stools are locking foot stools. A locking assembly capable of guaranteeing stable unfolding of the supporting foot stand is arranged between the supporting foot stand and the two installation supports, the locking assembly comprises a turnover plate hinged between the two installation supports, locking matching plates are arranged at the two ends of the turnover plate, and the locking matching plates are detachably connected with locking pins on the supporting foot stand in a clamped mode so that rotation locking and unlocking of the locking foot stand can be achieved. Linkage limiting assemblies are further arranged between the two sets of corresponding locking matching plates and the mounting support. According to the linkage limiting assembly, the linkage between the locking pin and the locking assembly and the linkage between the locking pin and the locking foot stool are deepened, the operation convenience of rotating and folding the supporting foot stool is greatly improved, and meanwhile the convenience of unfolding operation is kept.

Description

Technical Field

[0001] The invention belongs to the technical field of wood processing equipment, and in particular relates to a linkage woodworking auxiliary instrument. Background Art

[0002] When working with wood, a workbench is often used for securing the work surface. This workbench consists of a work surface and supporting legs. To facilitate installation and transportation, as well as storage when not in use, the supporting legs are often hinged to the work surface for easy folding and storage. Accordingly, to ensure the stability and reliability of the workbench when unfolded, a movable latch is often installed between the supporting legs and the work surface to enhance the stability of the connection between the two when the workbench is unfolded.

[0003] For example, a fast-linked woodworking auxiliary instrument disclosed in publication number CN221391453U uses a flip lever and a torsion spring locking assembly. By rotating and locking a limit pin between a first notch and a second notch, the work surface is stably locked in the unfolded state, and the counterclockwise rotation of the flip lever and the elastic deformation of the torsion spring enable rapid switching between unlocking and locking. However, in this technical solution, when the torsion spring locking assembly is unlocked, after pressing the flip lever down with a handle, the first leg must be immediately rotated. This requires two hands to perform a two-step operation when unlocking, or the operation speed is very fast, and the two actions of pressing down the flip lever and rotating the first leg can be completed before the torsion spring locking assembly elastically recovers. Therefore, it can be seen that there is no linkage between unlocking and rotating the leg, which makes the unlocking operation of this workbench more troublesome. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the existing technology and provide a linkage woodworking auxiliary instrument, which adds a linkage limit component to link the unlocking of the locking component with the rotation and folding of the supporting leg, so that after unlocking the locking component, sufficient time can be left to rotate the supporting leg, thereby greatly improving the convenience of operation.

[0005] In order to solve the above problems, the present invention adopts the following solutions: The locket is secured to the bottom of the workbench and is unlocked when the handle is engaged, and the locket is unlocked when the handle is engaged, and the locket is unlocked when the handle is engaged, and the locket is unlocked.

[0006] Preferably, the supporting legs are composed of two legs, the leg for locking the legs being a first leg, and the leg for the other supporting legs being a second leg. Locking pins are provided on the two first leg, and the flip plate is engaged or disengaged with the two locking pins simultaneously. The locking mating plates at the ends of the flip plate are hingedly connected to the corresponding mounting brackets via hinge shafts, thereby achieving hinged movement between the flip plate and the mounting bracket, and engaging or disengaging with the locking pins through the hinged movement.

[0007] Preferably, the locking assembly also includes a fixed notch provided on the inner side plate, a movable notch provided on the locking mating plate, and a reset torsion spring sleeved on the hinge shaft, wherein the fixed notch is located on the rotation path of the locking pin, and the movable notch can also be located on the rotation path of the locking pin as the flip plate rotates downward, so that the locking pin can rotate with the first foot rod and successively engage in the fixed notch and the movable notch. At this time, the movable notch is in the shape of an inclined "hook" to limit the locking pin from disengaging from the movable notch through its own rotation, and after the flip plate is rotated downward, the reset torsion spring will intensify its elastic deformation.

[0008] In the above scheme, when the supporting legs need to be stably unfolded, the locking pin on the locking leg can be simultaneously inserted into the fixed notch and the movable notch to restrict the rotation of the locking pin and the first leg rod connected thereto, thereby ensuring the stable unfolding of the workbench; when the supporting legs need to be rotated and folded, the flip plate can be turned downward to disengage the movable notch thereon from the locking pin, and then the locking leg can be rotated to disengage the locking pin thereon from the fixed notch, and then the locking leg and the other set of supporting legs can be rotated further to achieve rotational folding; and the flip plate is rotated back and returned to its initial state under the action of the reset torsion spring.

[0009] Preferably, the linkage limit assembly includes a connecting hole formed in the inner side plate and located below the fixed notch, the apertures at both ends of the connecting hole being inconsistent and a bottom wall being formed at the end away from the locking matching plate, a limiting pin being movably inserted in the connecting hole, a return spring being sleeved on the outer side of the limiting pin, one end of the return spring being connected to the bottom wall of the connecting hole, and the other end close to the locking matching plate being extended out of the connecting hole, both ends of the limiting pin having a circular end plate with a diameter larger than the maximum aperture of the connecting hole, the limiting pin also being equipped with a wedge-shaped driving member capable of driving it to move axially along the connecting hole, the wedge-shaped driving member being movably connected to the inner side plate and cooperating with the rotation of the supporting leg; Among them, when the movable notch is stuck in the locking pin, a part of the limit pin is located between the inner side of the inner plate and the locking matching plate, and the return spring is in a compressed state. When the movable notch rotates downward with the flip plate to disengage from the locking pin, the limit pin pops out and can be stuck in the movable notch. At this time, the folding locking leg can be rotated to drive the wedge-shaped driving part to move. The wedge-shaped driving part drives the limit pin to move axially and disengage from the movable notch, and at the same time compresses the corresponding part of the limit pin between the inner side of the inner plate and the locking matching plate again, and the flip plate rotates back to its initial state under the action of the return torsion spring.

[0010] Through the above scheme, after the flip plate is rotated downward, the limit pin that automatically pops out can be used to get it stuck in the movable notch to prevent the flip plate from continuing to rotate. This replaces the original scheme of preventing the flip plate from rotating back by continuously holding the hand. The disengagement of the limit pin from the movable notch does not need to be manually unlocked. Instead, the locking leg that originally needs to be rotated and folded is used to drive the limit pin axially to disengage from the movable notch, so that the flip plate can resume its self-rotation function until it returns to its initial state. This structure deepens the linkage between the locking pin, the locking assembly and the locking leg, greatly improving the operational convenience of the support leg for rotating and folding, while still maintaining the convenience of the unfolding operation.

[0011] Preferably, the wedge-shaped driving member has a guide pushing portion with a gradually increasing thickness, the guide pushing portion is arc-shaped and is always located between the outer side of the inner plate and the corresponding circular end plate, and a driving portion is formed at the lower end of the guide pushing portion, which can rotate along with the rotation of the locking tripod, wherein the guide pushing portion rotates upward along with the rotation and folding of the supporting tripod, so that the thickness of the guide pushing portion located between the inner plate and the circular end plate becomes larger and larger, so that the limit pin can be gradually pulled to move axially away from one end of the locking mating plate and compress the reset spring again.

[0012] Through the above arrangement, the aforementioned function of the limit pin being separated from the movable notch as the supporting stand rotates and folds can be achieved.

[0013] Preferably, the weight of the driving part is much greater than that of the guiding pushing part, and when the maximum thickness of the guiding pushing part is located between the inner plate and the circular end plate, the driving part is still located at the lower left of the entire wedge-shaped driving member.

[0014] With the above arrangement, after the supporting frame is unfolded and separated from the driving member, the wedge-shaped driving member can slide down by itself and return to the original position when the supporting frame was unfolded due to its own weight.

[0015] Preferably, the guide push portion is slidably connected to the inner plate, which is achieved by providing an arc-shaped sliding hole at one end of the inner plate close to the guide push portion, and providing a slider embedded in the arc-shaped sliding hole on the guide push portion, and the slider and the arc-shaped sliding hole slide flexibly, so that after the driving member is separated from the supporting leg, it can rely on its own weight to smoothly and flexibly rotate down to return to its original position without hindrance.

[0016] Preferably, the first leg rod and the second leg rod of each group are located between the corresponding inner plate and outer plate and in the same plane, wherein the two first leg rods are hinged to the two mounting brackets through two first pins respectively, and the second leg rod is hinged to the two mounting brackets through two second pins, and the first pins are lower than the second pins.

[0017] In the above setting, the first pin shaft of the locking leg is lower than the second pin shaft of the other supporting leg, so that during the process of rotating and folding the supporting leg, both can rotate relative to the mounting bracket, and during the rotating and folding process, the locking leg can push the other supporting leg to rotate in the folding direction, thereby realizing the linked folding between the two supporting legs, thereby improving the operational convenience of folding and storing the workbench.

[0018] Preferably, the locking mating plate is further provided with an arc-shaped guide hole capable of limiting its rotation angle, a guide pin is inserted into the arc-shaped guide hole, and the guide pin adopts a bolt structure and passes through the inner plate.

[0019] By providing the arc-shaped guide hole, the rotation angle of the flip plate can be conveniently limited to avoid excessive rotation and improve the overall structural compactness.

[0020] Preferably, the side wall of the locking mating plate is provided with a guide slope adjacent to the movable notch, and the end of the guide slope is connected to the open end of the movable notch.

[0021] By setting a guide bevel, the limit pin can be easily slid into the movable notch automatically; when the supporting leg is switched from the folded state to the unfolded state, the locking leg is rotated, and the locking pin will rotate synchronously with the locking leg, and then the limit pin will automatically snap into the fixed notch; when the limit pin is snapped into the fixed notch, it will first squeeze the locking mating plate along the guide bevel, and the torsion spring will produce elastic deformation; when the limit pin is at the open end of the movable notch, the limit pin automatically slides into the movable notch, and the locking assembly automatically switches to the locked state.

[0022] The beneficial effects of the present invention are: The present invention adds a linkage limit assembly, which links the unlocking of the locking assembly with the rotation and folding of the supporting leg, so that after the locking assembly is unlocked, the linkage limit assembly can be driven to start automatically, and the unlocking of the locking assembly is in a paused state, which is convenient for leaving enough time to rotate and fold the supporting leg. After the supporting leg is rotated, the supporting leg can drive the linkage limit assembly to recover by itself, and release the locking assembly from the aforementioned paused state, so that the locking assembly returns to its initial state.

[0023] Therefore, the structure of the present invention deepens the linkage between the locking pin and the locking assembly and the locking leg, greatly improving the convenience of the support leg in rotating and folding, while maintaining the convenience of the unfolding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the workbench in the unfolded state in the present invention; Figure 2 for Figure 1 A partial enlarged view of point Ⅰ in the middle (the arrow above it indicates the unlocking operation of the locking component); Figure 3 A schematic diagram of the structure of the linkage limit assembly after the locking assembly of the present invention is unlocked (the arrow above indicates the direction in which the locking tripod rotates and folds); Figure 4 A schematic diagram of a portion of the structure of the present invention showing the locking tripod being rotated and folded, and the driving linkage limit assembly being disengaged from the locking assembly (the arrow above indicates the direction of movement of the locking tripod and the wedge-shaped drive member during the disengagement process); Figure 5 A schematic diagram of the partial structure of the linkage limit assembly of the present invention disengaging from the locking assembly on the other side (the arrow above indicates the movement direction of the limit pin and the flip plate during the disengagement process); Figure 6 This is a structural diagram of the present invention when the linkage limit assembly is separated from the locking assembly and the locking assembly rotates back to the initial state; Figure 7 This is a two-dimensional structural schematic diagram of the limit linkage component in the invention.

[0025] Figure numerals: work surface 11, mounting base 12, mounting bracket 13, inner plate 131, outer plate 132, supporting leg 20, locking leg 21, first leg rod 211, second leg rod 221, first pin 231, second pin 232, linkage link 24, supporting link 25, supporting cross bar 26, locking assembly 30, flip plate 31, locking matching plate 311, guide slope 312, hinge shaft 32, return torsion spring 33, movable notch 34, fixed notch 35, locking pin 36, arc-shaped guide hole 371, guide pin 372, handle 38, linkage limit assembly 40, connecting hole 41, bottom wall 411, limit pin 42, circular end plate 421, return spring 43, wedge-shaped driving member 44, guide push part 441, driving part 442. DETAILED DESCRIPTION

[0026] Example: This embodiment provides a linkage woodworking auxiliary instrument, referring to Figure 1 , including a work surface 11, the bottom of the work surface 11 is provided with a pair of mounting bases 12, each mounting base 12 is provided with a mounting bracket 13 fixedly connected thereto, the mounting bracket 13 has an inner plate 131 and an outer plate 132 parallel to each other, two groups of supporting legs 20 are hinged between the two mounting brackets 13, the supporting legs 20 are composed of two foot rods, one group of supporting legs 20 is a locking leg 21, the foot rod thereon is a first foot rod 211, and the foot rod of the other supporting leg 20 is a second foot rod 221, and a locking assembly 30 is provided between the locking leg 21 and the two mounting brackets 13 to ensure that the supporting legs 20 are stably deployed.

[0027] Specifically, refer to Figure 2 The locking assembly 30 is symmetrically arranged and includes a flip plate 31 hinged between the two mounting brackets 13. The two ends of the flip plate 31 have locking matching plates 311. The locking matching plate 311 is hinged to the corresponding mounting bracket 13 through a hinge shaft 32. The hinge shaft 32 is sleeved with a reset torsion spring 33 that enables the flip plate 31 to rotate and restore after rotation. The locking matching plate 311 is provided with a movable notch 34, and the inner plate 131 is provided with a fixed notch 35. The ends of the two first foot rods 211 near the work surface 11 are fixedly connected with locking pins 36.

[0028] Among them, reference Figure 2The fixed notch 35 is located on the rotation path of the locking pin 36, and the movable notch 34 can also be located on the rotation path of the locking pin 36 as the flip plate 31 rotates downward, so that the locking pin 36 can rotate with the first foot rod 211 and successively engage with the fixed notch 35 and the movable notch 34. At this time, the movable notch 34 is in an inclined "hook" shape to limit the locking pin 36 from disengaging from the movable notch 34 through its own rotation, and after the flip plate 31 rotates downward, the reset torsion spring 33 will intensify the elastic deformation, accumulating torsional energy for the rotation and reset of the flip plate 31.

[0029] The working principle of the locking assembly 30 is as follows: When the supporting leg 20 needs to be stably unfolded, the locking pin 36 on the locking leg 21 can be successively inserted into the fixed notch 35 and the movable notch 34 to restrict the rotation of the locking pin 36 and the first leg rod 211 connected thereto, thereby ensuring the stable unfolding of the workbench; when the supporting leg 20 needs to be rotated and folded, the flip plate 31 can be turned downward to disengage the movable notch 34 thereon from the locking pin 36, and then the locking leg 21 can be rotated to disengage the locking pin 36 thereon from the fixed notch 35, and then the locking leg 21 can be rotated again to realize rotational folding; and the flip plate 31 is rotated back and returned to its initial state under the action of the return torsion spring 33.

[0030] refer to Figure 3 In this embodiment, a linkage limit assembly 40 is further provided between the two sets of corresponding locking matching plates 311 and the mounting bracket 13. The linkage limit assembly 40 is linked with the unlocking and downward rotation of the flip plate 31 to achieve the pause of the unlocking state of the locking assembly 30, so as to leave enough time for rotating and folding the supporting leg 20. It is also linked with the rotation and folding of the locking leg 21 to release the aforementioned pause state, so that the locking assembly 30 can resume the rotation function and rotate to the initial state.

[0031] Specifically, refer to 3- Figure 4 、 Figure 7The linkage limit assembly 40 includes a connecting hole 41 opened in the inner plate 131 and located below the fixed notch 35. The diameters of the two ends of the connecting hole 41 are inconsistent and a bottom wall 411 is formed at the end away from the locking matching plate 311. A limit pin 42 is movably inserted into the connecting hole 41, and a return spring 43 is sleeved on the outside of the connecting hole 41. One end of the return spring 43 is connected to the bottom wall 411 of the connecting hole 41, and the other end close to the locking matching plate 311 extends out of the connecting hole 41. The ends of the limit pin 42 have a diameter larger than that of the connecting hole 41. The circular end plate 421 has the largest aperture. The limiting pin 42 is also equipped with a wedge-shaped driving member 44 that can drive it to move axially along the connecting hole 41. The wedge-shaped driving member 44 is movably connected to the inner plate 131 and cooperates with the rotation of the supporting leg 20. (The thickness of the inner plate can be adjusted according to the required depth of the connecting hole during production. If the thickness of the inner plate is still too thin, the connection between the connecting hole and the return spring may be unstable. In this case, the depth of the connecting hole can be increased by axially extending the edge of the connecting hole near the locking plate.) Among them, reference Figure 2 When the movable notch 34 is stuck in the locking pin 36, a portion of the limit pin 42 is located between the inner side of the inner plate 131 and the locking matching plate 311, and the return spring 43 is in a compressed state. Figure 3 When the movable notch 34 rotates downward with the flip plate 31 and disengages the locking pin 36, the limit pin 42 pops out and can be stuck in the movable notch 34. At this time, Figure 4 The foldable locking leg 21 can be rotated to drive the wedge-shaped driving member 44 to move, and the wedge-shaped driving member 44 drives the limit pin 42 to move axially and disengage from the movable notch 34, and at the same time compresses the corresponding part of the limit pin 42 between the inner side of the inner plate 131 and the locking matching plate 311 (as shown in FIG. Figure 5 、 Figure 6 As shown, and the position at this time is not the same as the position when the movable notch is stuck in the locking pin), and the flip plate 31 rotates back to the initial state (as shown in FIG. Figure 6 shown).

[0032] The implementation principle of the linkage limit assembly 40 is as follows: After manually turning down the flip plate 31, the limit pin 42 can be automatically popped out to make it stuck in the movable notch 34 to prevent the flip plate 31 from continuing to rotate. This replaces the original solution of preventing the flip plate 31 from rotating back by continuously holding the hand. The limit pin 42 does not need to be manually disengaged from the movable notch 34. Instead, the locking leg 21, which originally needs to be rotated and folded, is used to drive the limit pin 42 axially to disengage from the movable notch 34, so that the flip plate 31 can rotate back to its original state again. This structure deepens the linkage between the locking pin 36 and the locking assembly 30 and the locking leg 21, greatly improving the operational convenience of the support leg 20 for rotating and folding, while maintaining the convenience of the unfolding operation.

[0033] The specific structure of rotating the locking leg 21 to drive the limit pin 42 out of the movable notch 34 is as follows: refer to Figure 4 The wedge-shaped driving member 44 has a guide pushing portion 441 with a gradually increasing thickness. The guide pushing portion 441 is arc-shaped and is always located between the outer side of the inner plate 131 and the corresponding circular end plate 421. A driving portion 442 is formed at the lower end of the guide pushing portion 441. The driving portion 442 is detachably abutted against the first foot rod 211 and can rotate along with the rotation of the locking leg 21. The guide pushing portion 441 rotates upward as the supporting leg 20 rotates and folds, so that the thickness of the guide pushing portion 441 located between the outer side of the inner plate 131 and the circular end plate 421 becomes larger and larger, so as to gradually pull the limit pin 42 to move axially away from the end of the locking matching plate 311, and compress the return spring 43 again until the circular end plate 421 on the limit pin 42 abuts against the inner side wall of the inner plate 131.

[0034] In order to make the support frame 20 detach from the driving member after being unfolded, it can slide down and return to the original position when the support frame 20 was unfolded. This embodiment uses the principle of self-weight downward rotation to achieve the initial state reset of the wedge-shaped driving member 44. Specifically, please refer to Figure 4 The weight of the driving part 442 is much greater than that of the guiding pushing part 441, and when the maximum thickness of the guiding pushing part 441 is located between the outer side of the inner plate 131 and the circular end plate 421, the driving part 442 is still located at the lower left of the wedge-shaped driving member 44 as a whole to ensure that the wedge-shaped driving member 44 slides down smoothly.

[0035] Furthermore, the guide push portion 441 is slidably connected to the inner plate 131 by providing an arcuate sliding hole at one end of the inner plate 131 close to the guide push portion 441, and providing a slider embedded in the arcuate sliding hole at the guide push portion 441 (the sliding connection structure is not shown in the figure), and the slider and the arcuate sliding hole are flexibly slidable, so that after the driving member is separated from the supporting leg 20, it can rely on its own weight to rotate flexibly and smoothly to return to its original position without hindrance.

[0036] In this embodiment, reference may be made to Figure 1 、 Figure 2 Each set of first and second leg rods 211, 221 are located between the corresponding inner and outer panels 131, 132 and lie in the same plane. The first leg rods 211 are hingedly connected to the mounting brackets 13 via two first pins 231, while the second leg rods 221 are hingedly connected to the mounting brackets 13 via two second pins 232. The first pins 231 are lower than the second pins 232. Therefore, during the rotation and folding process, the two support legs 20 can rotate independently and without interference. Furthermore, during the rotation and folding process, the locking leg 21 can also push the other support leg 20 to rotate in the folding direction, achieving coordinated folding between the two support legs 20 and improving the ease of folding and storage of the workbench.

[0037] To further improve the linkage between the two support legs 20. Figure 1 A linkage link 24 is provided between the first leg rods 211 and the second leg rods 221 of the two groups, and a support link 25 is provided between the two linkage links 24 and the connection between the two first leg rods 211. In order to ensure the support stability of the two supporting legs 20, a support cross bar 26 is provided between the two first links and between the two second links.

[0038] Furthermore, in order to facilitate limiting the rotation angle of the flip plate 31 and avoid excessive rotation, the overall structural compactness is improved. Figure 2 The locking mating plate 311 is also provided with an arc-shaped guide hole 371 which can limit its rotation angle and determine two rotation limit positions. A guide pin 372 is inserted into the arc-shaped guide hole 371. The guide pin 372 adopts a bolt structure and passes through the inner plate 131.

[0039] Further, refer to Figure 2 The side wall of the locking mating plate 311 is provided with a guide bevel 312 adjacent to the movable notch 34, and the distal end of the guide bevel 312 is connected to the open end of the movable notch 34. The provision of the guide bevel 312 facilitates the automatic sliding of the limit pin 42 into the movable notch 34. When the support leg 20 is switched from the folded state to the unfolded state, the locking leg 21 is rotated, and the locking pin 36 rotates synchronously with the locking leg 21, and then the limit pin 42 automatically snaps into the fixed notch 35. When the limit pin 42 snaps into the fixed notch 35, it first presses the locking mating plate 311 along the guide bevel 312, causing the torsion spring to produce elastic deformation. When the limit pin 42 is at the open end of the movable notch 34, it automatically slides into the movable notch 34, and the locking assembly 30 automatically switches to the locked state.

[0040] Further, refer to Figure 1In order to facilitate the downward rotation of the flip plate 31, a handle 38 is provided in the middle of the flip plate 31. Therefore, the flip plate 31 can be driven to rotate downward by pressing the handle 38.

[0041] The specific operation process of this embodiment is as follows: By default, the work surface 11 is in the unfolded state, and the locking assembly 30 is in the locked state. At this time, the locking pin 36 is simultaneously engaged in the fixed notch 35 and the movable notch 34, a portion of the limit pin 42 is located between the inner plate 131 and the locking mating plate 311, and the return spring 43 is in a compressed state. When the work surface 11 needs to be switched from the unfolded state to the folded state, the locking assembly 30 must first be unlocked, as follows: First, the handle 38 is pressed down to rotate the flip plate 31 downward and disengage the movable notch 34 thereon from the locking pin 36. At the same time, the locking mating plate 311 no longer resists the limit pin 42. As a result, the limit pin 42 can be ejected under the elastic action of the return spring 43. At this time, the handle 38 can be released, and the flip plate 31 can rotate back under the elastic action of the return torsion spring 33. During the rotation process, the movable notch 34 thereon is stuck by the limit pin 42, thereby limiting the further rotation of the flip plate 31, leaving sufficient operating time for the support leg 20 to rotate and fold. Then, the locking leg 21 is rotated in the folding direction, so that the locking pin 36 thereon is disengaged from the fixed notch 35. During the folding and rotating process, the first leg rod 211 also pushes the wedge-shaped driving member 44 to rotate upward, so that the thickness of the guide pushing portion 441 between the inner side plate 131 and the circular end plate 421 becomes increasingly thick, thereby pulling the limit pin 42 out along the side away from the movable notch 34, so that the limit pin 42 is disengaged from the movable notch 34, and the flip plate 31 resumes its elastic rotation function, thereby rotating back to its initial state. At the same time, the limit pin 42 is pulled by the wedge-shaped driving member 44 to be again located between the inner side of the inner side plate 131 and the locking mating plate 311, and the return spring 43 is compressed until the circular end plate 421 on it abuts against the inner side wall of the inner plate 131. When the workbench needs to be switched from the folded state to the unfolded state, the locking leg 21 is rotated in the unfolding direction, so that the first leg rod 211 is separated from the wedge-shaped driving member 44. The wedge-shaped driving portion 442 drives the entire wedge-shaped driving portion 442 to rotate downward along the arc-shaped sliding hole through the driving portion 442 with a heavier counterweight, so that the wedge-shaped driving member 44 returns to its original position. The limit pin 42 is elastically ejected to the corresponding circular end plate 421 by the return spring 43 and abuts against the wall of the locking matching plate 311. At this time, the return spring 43 is still in a compressed state and has returned to the default state. At the same time, when the locking leg 21 is rotated and unfolded, the two first leg rods 211 can be smoothly inserted into the fixed notch 35. During the insertion process, the locking pin 36 will move along the guide slope 312 of the locking matching plate 311 and squeeze the flip plate 31 to flip it, thereby causing the return torsion spring 33 to deform. When it moves along the guide slope 312 to the open end of the movable notch 34, the limit pin 42 automatically slides into the movable notch 34, and the locking assembly 30 automatically switches to the locked state, ensuring that the support leg 20 is stably unfolded.

Claims

1. A linkage woodworking auxiliary instrument, comprising a work surface (11), wherein the bottom of the work surface (11) is provided with a pair of mounting bases (12), each mounting base (12) is provided with a mounting bracket (13) fixedly connected thereto, and the mounting bracket (13) has an inner side plate (131) and an outer side plate (132) parallel to each other; characterized in that: Two groups of support legs (20) are hinged between the two mounting brackets (13), one of which is a locking leg (21). A locking assembly (30) is provided between the two mounting brackets (13) to ensure that the support legs (20) are stably unfolded. The locking assembly (30) is symmetrically arranged and includes a flip plate (31) hinged between the two mounting brackets (13). The flip plate (31) has locking matching plates (311) at both ends. The locking matching plates (311) and the locking pins (36) on the support legs (20) can be detachably engaged to achieve rotational locking and release of the locking leg (21). A linkage limiting assembly (40) is also provided between the two corresponding locking matching plates (311) and the mounting bracket (13). The linkage limiting assembly (40) is linked to the unlocking rotation of the flip plate (31) to achieve the suspension of the unlocking state of the locking assembly (30), and is linked to the rotation of the locking leg (21) to release the aforementioned suspension state.

2. The linkage woodworking auxiliary instrument according to claim 1, characterized in that: The supporting leg (20) is composed of two leg rods, the leg rod of the locking leg (21) is a first leg rod (211), and the leg rod of the other supporting leg (20) is a second leg rod (221). Locking pins (36) are provided on the two first leg rods (211). The flip plate (31) and the two locking pins (36) are engaged or separated at the same time. The locking matching plate (311) at its end is hinged to the corresponding mounting bracket (13) through a hinge shaft (32).

3. The linkage woodworking auxiliary instrument according to claim 2, characterized in that: The locking assembly (30) further comprises a fixed notch (35) provided on the inner side plate (131), a movable notch (34) provided on the locking matching plate (311), and a return torsion spring (33) sleeved on the hinge shaft (32), wherein the fixed notch (35) is located on the rotation path of the locking pin (36), and the movable notch (34) can also be located on the rotation path of the locking pin (36) as the flip plate (31) rotates downward, so that the locking pin (36) can rotate with the first foot rod (211) and successively engage with the fixed notch (35) and the movable notch (34), and after the flip plate (31) rotates downward, the return torsion spring (33) will intensify its elastic deformation.

4. The linkage woodworking auxiliary instrument according to claim 3, characterized in that: The linkage limit assembly (40) includes a connecting hole (41) opened in the inner plate (131) and located below the fixed notch (35), the apertures of the two ends of the connecting hole (41) are inconsistent and a bottom wall (411) is formed at one end away from the locking matching plate (311), a limit pin (42) is movably inserted into the connecting hole (41), a return spring (43) is sleeved on the outside of the limit pin (42), one end of the return spring (43) is connected to the bottom wall (411) of the connecting hole (41), and the other end close to the locking matching plate (311) extends out of the connecting hole (41), both ends of the limit pin (42) have circular end plates (421) with a diameter larger than the maximum aperture of the connecting hole (41), and the limit pin (42) is also equipped with a wedge-shaped driving member (44) that can drive it to move axially along the connecting hole (41), the wedge-shaped driving member (44) is movably connected to the inner plate (131) and cooperates with the rotation of the support leg (20); When the movable notch (34) is stuck in the locking pin (36), a portion of the limit pin (42) is located between the inner side of the inner plate (131) and the locking matching plate (311), and the return spring (43) is in a compressed state. When the movable notch (34) rotates downward with the flip plate (31) to disengage from the locking pin (36), the limit pin (42) pops out and can be stuck in the movable notch (34). At this time, the folding locking leg (21) can be rotated to drive the wedge-shaped driving member (44) to move. The wedge-shaped driving member (44) drives the limit pin (42) to move axially and disengage from the movable notch (34), and at the same time compresses the corresponding portion of the limit pin (42) again between the inner side of the inner plate (131) and the locking matching plate (311), and the flip plate (31) rotates back to the initial state under the action of the return torsion spring (33).

5. The linkage woodworking auxiliary instrument according to claim 4, characterized in that: The wedge-shaped driving member (44) has a guide push portion (441) with a gradually increasing thickness. The guide push portion (441) is arc-shaped and is always located between the outer side of the inner plate (131) and the corresponding circular end plate (421). A driving portion (442) is formed at the lower end of the guide push portion (441). The driving portion (442) can rotate along with the rotation of the locking leg (21). The thickness of the guide push portion (441) located between the inner plate (131) and the circular end plate (421) increases as the supporting leg (20) is folded and rotated, and gradually pulls the limit pin (42) to move axially away from one end of the locking matching plate (311) to compress the return spring (43) again.

6. The linkage woodworking auxiliary instrument according to claim 5, characterized in that: The weight of the driving portion (442) is greater than that of the guiding pushing portion (441), and when the maximum thickness of the guiding pushing portion (441) is located between the inner plate (131) and the circular end plate (421), the driving portion (442) is still located at the lower left of the entire wedge-shaped driving member (44).

7. The linkage woodworking auxiliary instrument according to claim 5, characterized in that: The guide push portion (441) is slidably connected to the inner plate (131), which is achieved by providing an arc-shaped sliding hole at one end of the inner plate (131) close to the guide push portion (441), and providing a slider embedded in the arc-shaped sliding hole at the guide push portion (441), and the slider and the arc-shaped sliding hole slide flexibly.

8. The linkage woodworking auxiliary instrument according to claim 1, characterized in that: The first foot rod (211) and the second foot rod (221) of each group are both located between the corresponding inner plate (131) and outer plate (132), wherein the two first foot rods (211) are hinged to the two mounting brackets (13) through two first pins (231), and the second foot rod (221) is hinged to the two mounting brackets (13) through two second pins (232), and the first pins (231) are lower than the second pins (232).

9. The linkage woodworking auxiliary instrument according to claim 1, characterized in that: The locking mating plate (311) is further provided with an arc-shaped guide hole (371) capable of limiting its rotation angle. A guide pin (372) is inserted into the arc-shaped guide hole (371). The guide pin (372) adopts a bolt structure and passes through the inner plate (131).

10. The linkage woodworking auxiliary instrument according to claim 3, characterized in that: The side wall of the locking matching plate (311) is provided with a guide slope (312) arranged adjacent to the movable notch (34), and the end of the guide slope (312) is connected to the open end of the movable notch (34).

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