Multi-linkage folding workbench

Abstract

The invention belongs to the technical field of wood processing equipment, and particularly relates to a multi-linkage folding workbench which comprises a workbench plate and two sets of supporting foot stools hinged to the lower end of the workbench plate. A synchronous linkage and locking device is arranged between the two supporting foot stools and the working table and comprises two foot stool linkage structures used for driving the two supporting foot stools to synchronously rotate inwards or outwards, and the two foot stool linkage structures are installed in two sliding ways at the lower end of the working table in a sliding mode respectively. The locking structure is matched with the linkage structure of the two foot stools in a separable mode, and when the two supporting foot stools are completely folded or unfolded, the locking structure can be automatically connected with the linkage structure of the foot stools in a clamped mode to achieve locking. According to the invention, by arranging the synchronous linkage and locking device, the rotation linkage between the two supporting foot stools is increased, and the locking function is associated with the rotation of the two supporting foot stools, so that the structure is more compact, the use reliability is ensured, the operations of rotating the foot stools and locking are simplified, and the operation convenience is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of wood processing equipment, specifically relating to a multi-linkage folding workbench. Background Technology

[0002] When processing wood, a workbench is usually used for fixation. Existing workbenches typically have foldable legs. For example, the existing patent with publication number CN221020889U discloses a workbench that is easy to fold and unfold. It includes a tabletop body and a pair of support leg assemblies. The support leg assemblies are hinged to the tabletop body. Each support leg assembly is connected to the tabletop body with a connecting rod assembly to facilitate folding and unfolding. The connecting rod assembly is equipped with a limiting sleeve to keep the support leg in a stable unfolded state. A pin locking assembly is also provided at the bottom of the tabletop body to keep the support leg stably in a folded state.

[0003] However, in this technical solution, the two sets of support legs are set independently without any linkage, and the rotation of the support legs is also not linked to the latch lock assembly. When it is necessary to fold or unfold the legs, both sets of support legs need to be manually rotated separately, making the folding or unfolding operation of the support legs rather cumbersome. Before unfolding or after folding, the pull ring must be pulled to unlock or lock. The latch lock assembly is installed under the table body, and the folding legs are also under the table body. The folding legs occupy some space around the latch lock assembly, and the latch lock assembly is already small in size, making it inconvenient to quickly locate and contact the latch lock assembly. Therefore, in this technical solution, the folding and unfolding operation of the workbench, as well as the unlocking operation, are quite inconvenient. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-linkage folding workbench. By setting up a synchronous linkage and locking device, it not only increases the rotation linkage between the two support legs, avoiding the need to manually rotate the two legs in stages, thus improving the ease of operation, but also links the locking function with the completion of the rotation of the two support legs, so that synchronous automatic locking can be achieved when fully folded or unfolded, further improving the ease of operation. At the same time, it also makes the overall structure of the workbench more compact and ensures the reliability of use.

[0005] To solve the above problems, the present invention adopts the following solution: A multi-linkage folding workbench includes a rectangular workbench and two sets of support legs. Each set of support legs consists of two legs and a crossbar connecting the two legs. Each leg is hinged to one of the four corresponding corners of the lower end of the workbench via a hinge rod. The two support legs are designated as a first leg and a second leg. The two legs of the first leg are located on the outer sides of the corresponding legs of the second leg, and the end of the first leg closest to the workbench is closer to the workbench than the end of the second leg, allowing both legs to rotate inward simultaneously for folding and storage. A synchronous linkage and locking device is also provided between the two support legs and the workbench. The synchronous linkage and locking device is symmetrically arranged and includes: The leg linkage structure is used to drive the two support legs to rotate inward or outward synchronously. There are two sets of them, which are slidably installed in the two slide rails at the lower end of the worktable. The two slide rails are arranged in parallel and from one set of support legs to the other set of support legs. The two leg linkage structure is hinged to the two support legs through two common hinged connecting rods. The hinged connecting rods are hinged to the ends of the support legs near the worktable. The locking structure can be detached from and engaged with the bipod linkage structure to simultaneously restrict the movement of the bipod linkage structure. When the two support legs are fully folded or fully unfolded by moving the bipod linkage structure, it can automatically engage with the bipod linkage structure to achieve locking.

[0006] In the above solution, the linkage structure of the tripod increases the linkage between the two support tripods, so that the two support tripods can rotate inward or outward simultaneously. Thus, the folding or unfolding of the support tripods can be achieved by pushing or pulling, which improves the ease of operation. The locking structure can automatically lock when the tripods are fully folded or unfolded, which further improves the ease of operation.

[0007] Preferably, the tripod linkage structure includes a drive slide rod slidably installed in the slide rail. One end of the drive slide rod is hinged to the hinge link at the second tripod via a hinge seat fixed thereto. The other side of the drive slide rod is hinged to the hinge link at the first tripod via a pull-lock linkage assembly. The movement of the drive slide rod can simultaneously drive the hinge links of the two supporting tripods to move in the opposite direction.

[0008] In the above solution, the hinge seat and the zipper linkage assembly can be moved simultaneously by moving the drive slide rod. The hinge seat drives the hinge link of the second leg to move, and the zipper linkage assembly drives the hinge link of the first leg to move in the opposite direction. The hinge link then drives the corresponding support leg end to move, so that the support leg rotates around the hinge part of the hinge rod. Thus, the first leg and the second leg can rotate in opposite directions, thereby simultaneously completing the outward rotation and unfolding or inward rotation and folding of the two support legs, improving the ease of operation.

[0009] Preferably, the zipper linkage assembly includes: The mounting housing is detachably connected to the workbench and forms a cavity with the workbench to accommodate the following components; The first fixed pulley is fixedly installed inside the cavity; The partition connecting pin is fixed to the drive slide bar; The sliding mounting base is slidably mounted in the slide rail of the mounting housing and is hinged to the hinge link of the first leg; The first zipper is fixed at one end to the sliding mounting base and at the other end to the partition connecting nail, and moves around the first fixed pulley in the middle.

[0010] In the above scheme, the partition connecting pin can be moved by moving the sliding rod, and the partition connecting pin can then move the sliding mounting seat and the hinged connecting rod connected thereto through the first zipper. The hinged connecting rod then moves the end of the first leg, thereby causing the first leg to rotate around the hinged part with the hinged rod, thus realizing the folding or unfolding of the first leg.

[0011] Preferably, the zipper linkage assembly further includes a second fixed pulley and a second zipper, wherein the second fixed pulley is fixedly installed in the cavity; the partition connecting pin is located between the first fixed pulley and the second fixed pulley; one end of the second zipper is fixedly connected to the sliding mounting seat, the other end is fixedly connected to the partition connecting pin, and the middle part moves around the second fixed pulley.

[0012] In the above scheme, the distance between the first and second fixed pulleys is fixed. By moving the drive slide rod, the partition connecting pin can be moved, and the length of the lock between the partition connecting pin and the first fixed pulley and the length of the lock between the partition connecting pin and the second fixed pulley will change in opposite directions. Since the lengths of the first and second locks are fixed, the lengths of the two locks between the sliding mounting base and the corresponding fixed pulley will also change in opposite directions as the partition connecting pin moves. Therefore, no matter which direction the drive slide rod moves, one side of the lock will always be in a taut state, thus ensuring a stable pulling force to the sliding mounting base, enabling it to drive the first leg to rotate stably and smoothly. The operator can also move freely when moving the drive slide rod without worrying about the locks loosening during the pulling process.

[0013] Preferably, the end of the slide rail near the first stand is connected to the outside, and a sliding handle is connected between the two drive slide rods on that side. The sliding handle is always exposed outside the worktable on that side.

[0014] The exposed sliding handle allows for easy movement of the drive rod along the slide rail, improving ease of operation.

[0015] Preferably, the locking structure is located on the side near the first tripod, and includes: The folding locking hole and unfolding locking hole are provided in two sets corresponding to the tripod linkage structure. Each set passes through the slide rail and the corresponding drive slide rod at the same time. The locking rod has two rods facing the two drive slide rods respectively. It can also be detachably connected to the folding locking hole and the unfolding locking hole. When the support leg is fully folded, the locking rod is aligned with the folding locking hole. When the support leg is fully unfolded, the locking rod is aligned with the unfolding locking hole. The unlocking drive key is slidably installed in the mounting slot of the workbench, with one end always exposed outside the side wall of the workbench. It also works in conjunction with two locking rods, so that as the unlocking drive key slides, it can simultaneously drive the two locking rods to move closer to each other. The restoring spring is installed in the mounting slot and stably connected between the two locking rods. When the restoring spring is at its original length, the two locking rods can be stably inserted into the folding locking hole or unfolding locking hole.

[0016] In the above solution, pressing the unlock drive button causes the two locking rods to move closer together, thus compressing the return spring. At the same time, the other ends of the two locking rods move away from the drive slide rod until they disengage from the folding or unfolding locking hole. Then, the unlock drive button is released, and the drive slide rod can now move freely. Continuing to move the drive slide rod until it is fully folded or fully unfolded, the folding or unfolding locking hole on it aligns with the locking rod. Under the elastic force of the return spring, the locking rod automatically springs into the folding or unfolding locking hole, thus achieving synchronous automatic locking of the support leg when folding or unfolding is complete.

[0017] Preferably, the unlocking drive key has two wedge-shaped holes symmetrically provided, and the two wedge-shaped holes are slidably connected to the pins of the two locking rods respectively. The wedge-shaped holes have guide slopes, and the guide slopes are always in contact with the pins.

[0018] The above scheme allows the wedge-shaped hole on the key to move as it is pressed and moved. As a result, the guide slope pushes the two locking rods closer together via the pin, thereby disengaging from the folded locking hole or unfolding the locking hole.

[0019] Preferably, both legs of the second tripod are provided with leg locking holes, and a leg locking component is also provided parallel above the side of the two locking rods near the corresponding drive slide rod. The end of the leg locking component is elastic so that it can be separated and inserted into the leg locking hole. During the folding of the second tripod, the leg locking component can undergo slight deformation and spring into the leg locking hole. During the unfolding of the second tripod, the leg locking component undergoes slight deformation again and pops out of the leg locking hole.

[0020] With the above-mentioned further settings, the second tripod can be further locked after folding through the leg locking parts and leg locking holes, which improves the stability of the folding support tripod. Furthermore, the leg locking parts and locking rods move synchronously, so automatic locking can still be achieved while the support tripod is folded, which further improves the linkage between the components and makes the locking operation convenient and quick.

[0021] Preferably, the foot lock member passes through the mounting housing so that the mounting housing can provide a certain blocking support to the foot lock member, ensuring that it is stably inserted into the foot lock hole. The foot lock member also has a recessed movable space corresponding to the cavity of the mounting housing to avoid interference with the movement of other components in the mounting housing.

[0022] Preferably, when both support legs are fully folded, the first leg is confined between the second leg and the worktable.

[0023] The above solution ensures that, even though the rotation of the support legs is already restricted by the locking structure, the first leg is confined between the second leg and the worktable, while the second leg is further restricted from rotating by the leg locking mechanism. This further guarantees the folding stability of the support legs.

[0024] The beneficial effects of this invention are as follows: By setting up a synchronous linkage and locking device, the present invention utilizes the included leg linkage structure to increase the linkage between the two support legs, so that by simply pushing and pulling the sliding handle, the two support legs can be driven to rotate inward and fold or rotate outward and unfold synchronously, which improves the ease of operation. Moreover, the operation of moving the sliding handle is more convenient and easier to implement than the operation of rotating the legs. It also utilizes an included locking structure, which can be unlocked simply by pressing the unlocking drive button. This allows the sliding handle to be pushed or pulled to complete the synchronous folding or unfolding of the two support legs. When fully folded or fully unfolded, the locking structure can lock synchronously and automatically, thus improving the ease of operation. Furthermore, the unlocking drive button is exposed on the side wall of the workbench, allowing the operator to quickly locate the unlocking drive button and ensuring convenient and quick unlocking operation.

[0025] As can be seen from the above description, the present invention improves the linkage between the two support legs and links the locking function with the rotation of the support legs, making the structure of the workbench more compact and the linkage more efficient. Therefore, it can ensure that the workbench is stable and reliable in use and easy to operate.

[0026] In this invention, the synchronous drive scheme for the tripods is achieved by setting a drive slide rod, with one side directly connected to one of the tripods and the other side connected to the other tripod via a pull-lock linkage assembly. Compared to alternative structures such as gears and racks that can also move in both directions, this connection method uses components with a simpler structure, more flexible installation and arrangement, lower cost, and is easier to produce and maintain. Furthermore, the connection and drive between the two tripods and the drive slide rod are independent. As long as the drive slide rod is fault-free, it will not affect the two tripods simultaneously. Therefore, the independence of the two tripods can be guaranteed, ensuring the support stability and rotation failure rate of each tripod.

[0027] The locking structure of this invention, while completing the folding process, not only restricts the movement of the leg linkage structure through the locking rod, thereby achieving the initial locking of the entire support leg, but also achieves further individual locking of the second leg through the leg locking component. The locking of the second leg, in turn, restricts the rotation of the first leg, thus further improving the folding stability of the support leg and ensuring the reliable use of this workbench. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the support frame of the present invention in its unfolded state; Figure 2 This is a schematic diagram of the structure of the present invention after the worktable is hidden; Figure 3 for Figure 2 A magnified view of a section at point I; Figure 4 This is a partial structural diagram of the zipper linkage component of the present invention after the housing is concealed. Figure 5 A cross-sectional view of the zipper linkage assembly installed in the workbench in this invention; Figure 6 for Figure 5 Enlarged view of a section at point II; Figure 7 for Figure 6 Enlarged view of a section at point III; Figure 8 This is a partial planar structural schematic diagram of the locking structure of the present invention; Figure 9 for Figure 2 Enlarged view of a section at point IV; Figure 10 This is a structural schematic diagram of the support frame of the present invention during the folding process; Figure 11 This is a schematic diagram of the structure of the support frame of the present invention after folding.

[0029] Figure label: Workbench 11, support legs 12, hinge rod 13, slide rail 111, mounting groove 112, foot rod 121, crossbar 122, accommodating space 123, first leg 1201, second leg 1202, synchronous linkage and locking device 20, leg linkage structure 21, locking structure 22, sliding handle 23, hinge link 211, drive slide rod 212, hinge seat 213, pull lock linkage assembly 214, mounting housing 2141, first Fixed pulley 2142, second fixed pulley 2143, partition connecting pin 2144, sliding mounting base 2145, first zipper 2146, second zipper 2147, slide rail 2148, folding locking hole 221, unfolding locking hole 222, locking rod 223, unlocking drive key 224, restoring spring 225, wedge hole 2241, guide slope 2242, pin 2231, foot rod locking hole 2261, foot rod locking piece 2262. Detailed Implementation

[0030] Example: This embodiment provides a multi-linkage folding worktable, see reference. Figure 1 The system includes a rectangular workbench 11 and two sets of support legs 12 located at the lower end of the workbench. A dedicated leg linkage structure 21 is set between the two support legs 12, and the operating parts on the leg linkage structure 21 are used to drive the two support legs 12 to rotate inward and fold or rotate outward and unfold synchronously, which improves the linkage between the two support legs 12 and simplifies the folding or unfolding operation of the two support legs 12. At the same time, a locking structure 22 that cooperates with the leg linkage structure 21 is also designed, so that the two support legs 12 are automatically locked when fully folded or fully unfolded, further improving the ease of use of this workbench.

[0031] Among them, reference Figure 1 Each set of support legs 12 consists of two legs 121 and a crossbar 122 connecting the two legs 121. The two legs 121 and the crossbar 122 form a receiving space 123 with three sides blocked and one side connected (e.g., Figure 10 As shown), the non-end portion of each leg 121 near the workbench is hinged to the corresponding four corners of the lower end of the workbench 11 via hinge rods 13. The two support legs 12 are respectively the first leg 1201 and the second leg 1202, which can be further referenced. Figure 10 , Figure 11 The two legs 121 of the first tripod 1201 are located on the outside of the corresponding two legs 121 of the second tripod 1202, and then refer to... Figure 5The end of the first leg 1201 that is closer to the tabletop is closer to the tabletop than the end of the second leg 1202 that is closer to the tabletop, so that the two legs will not interfere with each other when they rotate inward at the same time. After folding and storing, both the first leg 1201 and the second leg 1202 are parallel to the workbench 11.

[0032] refer to Figure 1 A synchronous linkage and locking device 20 is also provided between the two support legs 12 and the worktable 11, for reference. Figure 2 The synchronous linkage and locking devices 20 are symmetrically arranged, including: The leg linkage structure 21 is used to drive the two support legs 12 to rotate inward or outward synchronously. It is provided in two sets, which are slidably installed in the two slide rails 111 at the lower end of the worktable 11. The two slide rails 111 are arranged in parallel and from one set of support legs 12 toward the other set of support legs 12. The two leg linkage structure 21 is hinged to the two support legs 12 through two common hinged connecting rods 211. The hinged connecting rods 211 are hinged to the end of the support leg 12 near the worktable 11. The locking structure 22 can be detached and engaged with the bipod linkage structure 21. It is used to simultaneously restrict the movement of the bipod linkage structure 21. When the two support legs 12 are fully folded or fully unfolded by moving the bipod linkage structure 21, it can automatically engage with the bipod linkage structure 21 to achieve locking.

[0033] The principle of the synchronous linkage and locking device 20 is as follows: First, the locking structure 22 releases the lock on the tripod linkage structure 21, and then drives the tripod linkage structure 21 to move in the slide rail 111, causing it to move the two hinged connecting rods 211. The hinged connecting rods 211 then drive the ends of the legs 121 of the support tripod 12 to move, so that the two legs 121 of the support tripod 12 rotate around the hinge part with the hinge rod 13, thereby realizing the rotation of the support tripod 12. When folding or unfolding is completed, the locking component engages with the tripod linkage structure 21 again to lock and ensure the stability of the folded or unfolded state.

[0034] Specifically, refer to Figure 2 , Figure 5The tripod linkage structure 21 includes a drive slide rod 212 slidably installed in the slide rail 111. One end of the drive slide rod 212 is hinged to the hinge link 211 at the second tripod 1202 via a hinge seat 213 fixed thereto. The other side of the drive slide rod 212 is hinged to the hinge link 211 at the first tripod 1201 via a pull-lock linkage assembly 214. The movement of the drive slide rod 212 can simultaneously drive the hinge links 211 of the two support tripods 12 to move in opposite directions. The drive slide rod 212 can be integral or segmented and connected by screws and other connectors. In order to ensure the installation stability of the slide rod in the slide rail 111, baffles can be connected to part of the slide rail 111 by screws to form side walls that block the drive slide rod 212. In this embodiment, the baffle is set on the side close to the second stand 1202. At the same time, in order to accommodate the sliding of the hinge seat 213, the baffle is also provided with a sliding hole through which the hinge seat 213 passes.

[0035] Therefore, by moving the drive slide bar 212, the hinge seat 213 and the zipper linkage assembly 214 can be moved simultaneously. The hinge seat 213 drives the hinge link 211 of the second leg 1202 to move, and the zipper linkage assembly 214 drives the hinge link 211 of the first leg 1201 to move in the opposite direction. The hinge link 211 then drives the end of the corresponding support leg 12 to move, so that the support leg 12 rotates around the hinge part of the hinge bar 13. Thus, the first leg 1201 and the second leg 1202 rotate in opposite directions, thereby synchronously completing the outward rotation and unfolding or inward rotation and folding of the two support legs 12, simplifying the operation steps and improving the ease of operation.

[0036] Preferably, refer to Figures 3-7 The zipper linkage assembly 214 includes: Mounting housing 2141 (e.g.) Figure 3 As shown in the figure, it is detachably connected to the worktable 11 by screws or other connectors, and forms a cavity with the worktable 11 for mounting the following components (the cavity is not marked in the figure). First fixed pulley 2142, second fixed pulley 2143 (e.g.) Figure 4 , Figure 6 (As shown), all are fixedly installed inside the cavity; Partition connecting nail 2144 (e.g.) Figure 7 As shown), it is fixed to the drive slide bar 212 and located between the first fixed pulley 2142 and the second fixed pulley 2143; Sliding mount 2145 (e.g.) Figure 4 , Figure 6 As shown), the slide rail 2148 (as shown) is slidably mounted on the mounting housing 2141. Figure 3 (as shown), and is hinged to the hinge link 211 of the first leg 1201; First zipper 2146 (e.g.) Figure 4 , Figure 6 As shown), one end is fixedly connected to the sliding mounting base 2145, the other end is fixedly connected to the partition connecting nail 2144, and the middle part moves around the first fixed pulley 2142; Second zipper 2147 (e.g.) Figure 4 , Figure 6 As shown), one end is fixedly connected to the sliding mounting base 2145, the other end is fixedly connected to the partition connecting nail 2144, and the middle part moves around the second fixed pulley 2143.

[0037] The specific implementation principle of the zipper linkage component 214 is as follows: For ease of description, the first zipper 2146 is divided into two segments, with the first fixed pulley 2142 as the dividing point. The segment between the zipper 2146 and the partition connecting pin 2144 is the first segment, and the segment between the zipper 2146 and the sliding mounting base 2145 is the second segment. Similarly, the second zipper 2147 is divided into two segments, with the second fixed pulley 2143 as the dividing point. The segment between the zipper 2146 and the partition connecting pin 2144 is the third segment, and the segment between the zipper 2147 and the sliding mounting base 2145 is the fourth segment. This component can move the partition connecting pin 2144 by moving the drive slide 212. Since the distance between the first fixed pulley 2142 and the second fixed pulley 2143 is fixed, the movement of the partition connecting pin 2144 can cause the distance between it and the first fixed pulley 2142 and the second fixed pulley 2143 to change in opposite directions. Correspondingly, the lengths of the first segment and the third segment will change in opposite directions, with one segment becoming longer and the other becoming shorter. Since the lengths of the first zipper 2146 and the second zipper 2147 are fixed, the second segment can adapt to the first segment, and the fourth segment can adapt to the third segment, with one segment becoming longer and the other becoming shorter. Therefore, no matter which direction the drive slide 212 moves, one side of the zipper is always in a taut state, thus providing a stable pulling force to the sliding mounting base 2145, enabling it to drive the first stand 1201 to rotate stably and smoothly. The operator can also move freely when moving the drive slide 212 without worrying about the zipper loosening that may occur during the pulling process.

[0038] To facilitate the pushing and pulling of the drive slide bar 212, this embodiment also includes a sliding handle 23 connected between the two drive slide bars 212, with the following configuration. (See reference below.) Figure 1 , Figure 10 The end of the slide 111 near the first stand 1201 is connected to the outside. A sliding handle 23 is installed between the two drive slide rods 212 on this side by screws or other connecting parts. The sliding handle 23 is always exposed outside this side of the worktable 11, which makes it convenient for the operator to quickly position and grab the sliding handle 23, thereby further improving the ease of operation by pushing and pulling the linkage structure 21 of the drive stand.

[0039] To ensure stability when the support leg 12 is unfolded or folded, a locking structure 22 is also provided, the specific structure of which is as follows. (Reference) Figure 2 , Figure 4 , Figure 5 , Figure 8 The locking structure 22 is located on the side near the first tripod 1201 and includes: Folding locking hole 221, unfolding locking hole 222 (as shown) Figure 1 , Figure 4 , Figure 5 As shown), there are two sets of bipod linkage structures 21, each set passing through the slide rail 111 and the corresponding drive slide rod 212. Locking rod 223 (e.g.) Figure 4 , Figure 8 As shown), there are two rods 212 facing the two drive slides respectively. They are also detachably plugged into the folding locking hole 221 and the unfolding locking hole 222. When the support leg 12 is fully folded, the locking rod 223 is aligned with the folding locking hole 221. When the support leg 12 is fully unfolded, the locking rod 223 is aligned with the unfolding locking hole 222. Unlock driver key 224 (e.g.) Figure 8 As shown), it is slidably installed in the mounting groove 112 of the worktable 11. There is space between the mounting groove 112 and the unlocking drive key to accommodate the sliding of the unlocking drive key 224. The unlocking drive key 224 is movably engaged with the two locking rods 223. As the unlocking drive key 224 slides, it drives the two locking rods 223 to move closer to each other, thereby disengaging from the folding locking hole 221 or unfolding the locking hole 222. 225 recovery spring (e.g.) Figure 8 As shown), it is installed in the mounting slot 112 and stably connected between the two locking rods 223. When the restoring spring 225 is at its original length, the two locking rods 223 can be stably inserted into the folding locking hole 221 or unfolding locking hole 222.

[0040] Among them, reference Figure 8 To enable the unlocking drive key 224 to drive the two locking rods 223 to move closer together, two wedge-shaped holes 2241 are symmetrically provided on the unlocking drive key 224. The two wedge-shaped holes 2241 are slidably connected to the pins 2231 of the two locking rods 223 respectively. The wedge-shaped holes 2241 have guide slopes 2242, and the guide slopes 2242 always abut against the pins 2231.

[0041] The principle and operation process of the locking structure 22 are as follows: Pressing the unlocking drive button 224 compresses the restoring spring 225 and moves the wedge-shaped hole 2241 on the unlocking drive button 224. The guide slope 2242 of the wedge-shaped hole 2241 pushes the two locking rods 223 closer together through the pin 2231, so that the other ends of the two locking rods 223 gradually disengage from the folding locking hole 221 or the unfolding locking hole 222. Then, release the unlocking drive button 224. At this time, the drive slide bar 212 can move freely. Move the drive slide bar 212 until the tripod is fully folded or fully unfolded. At this time, the folding locking hole 221 or the unfolding locking hole 222 on it aligns with the locking rod 223. Under the elastic force of the restoring spring 225, the locking rod 223 automatically springs into the folding locking hole 221 or the unfolding locking hole 222, thus realizing the synchronous automatic locking of the support tripod 12 when it is folded or unfolded.

[0042] For easier pressing of the unlock button 224, please refer to... Figure 1 The mounting groove 112 passes through the side wall of the worktable 11 at one end near the sliding handle 23. The unlocking drive key 224 is slidably mounted in the mounting groove 112 from the end that passes through, so that the side end of the unlocking drive key 224 is always exposed outside the side wall of the worktable 11.

[0043] Furthermore, since the support leg 12 tends to rotate and unfold under its own weight after folding, which increases the resistance to the locking structure 22, this embodiment further restricts the rotation of the support leg 12 to improve the stability of the workbench after folding. The specific structure is as follows.

[0044] refer to Figures 2-4 , Figure 9 The two legs 121 of the second tripod 1202 are provided with leg sleeves at the ends away from the worktable 11. The leg sleeves have leg locking holes 2261. The two locking rods 223 are also provided with leg locking members 2262 parallel to each other on the side above the corresponding drive slide rod 212. The ends of the leg locking members 2262 are elastic so that they can be separated and inserted into the leg locking holes. Therefore, during the folding process of the second tripod 1202, the leg locking members 2262 can undergo slight deformation and spring into the leg locking holes 2261. During the unfolding process of the second tripod 1202, the leg locking members 2262 undergo slight deformation again and pop out of the leg locking holes 2261.

[0045] The foot locking member 2262 also passes through the mounting housing 2141 (e.g. Figure 3As shown), so that the mounting housing 2141 can provide a certain blocking support to the foot lock member 2262, ensuring its stable insertion into the foot lock hole 2261. The foot lock member 2262 also has a recessed movable space corresponding to the cavity of the mounting housing 2141 to avoid interference with the movement of other components in the mounting housing 2141 (such as...). Figure 4 (as described).

[0046] In the above configuration, the leg locking member 2262 is located on the locking rod 223, so it can move synchronously with the locking rod 223. When the locking rod 223 extends and is inserted into the folding locking hole 221, the leg locking member 2262 also extends and is inserted into the leg locking hole 2261 at the same time. Therefore, automatic locking can still be achieved while the support leg 12 is folded, ensuring that the locking operation is convenient and quick.

[0047] Furthermore, this embodiment also restricts the first leg 1201 after folding. When both sets of support legs 12 are fully folded, the two legs 121 of the second leg 1202 are located in the receiving space 123 formed by the first leg 1201 (e.g., Figure 10 As shown), the first leg 1201 is thus confined between the second leg 1202 and the workbench 11.

[0048] Therefore, the unfolding and rotation tendency of the first leg 1201 can be blocked by the restricted second leg 1202. This means that, while the rotation of the support leg 12 is already restricted by the locking structure 22, the first leg 1201 is restricted between the second leg 1202 and the worktable 11. The second leg 1202 is further restricted from rotating by the leg locking member 2262, which further ensures the folding stability of the support leg 12.

[0049] The operation process in this embodiment is as follows: In the default state, the workbench is in the unfolded state, at which time the sliding handle 23 is furthest from the workbench plate 11, and the locking rod 223 of the locking structure 22 is inserted into the unfolding locking hole 222; when it is necessary to fold the support leg 12, it can be combined with Figures 5-7 For reference, the arrow above indicates the process of folding the support tripod 12, and combining... Figure 10 Refer to the unlocking process of the arrow-shaped locking structure 22; First, press the unlock drive button 224 to move it within the mounting slot 112. The unlock drive button 224 will cause the two locking rods 223 to disengage from the unfolding locking hole 222. Then, push the sliding handle 23 inward to move the two drive slide rods 212. After pushing a small distance and ensuring that the locking rods 223 will no longer insert into the unfolding locking hole 222, you can release the unlock drive button 224 and continue to push the sliding handle 23. During the movement of the drive slide bar 212, on the one hand, the hinge seat 213 drives the end of the second leg 1202 near the workbench 11 to move outward, thereby causing the other end of the second leg 1202 to rotate and fold inward around its hinge point with the hinge bar 13. On the other hand, the pull-lock linkage assembly 214 drives the partition connecting pin 2144 on it to move towards the center of the workbench 11. The partition connecting pin 2144 pulls the first pull lock 2146, ensuring that the first pull lock 2146 is always in a taut state. The first pull lock 2146 is in a taut state. The sliding mounting base 2145 pulls the end of the first leg 1201 near the workbench 11 to move outwards. Therefore, the other end of the first leg 1201 rotates inwards and folds around the hinge part with the hinge rod 13, realizing the switching of the workbench's folding state. When the support leg 12 is fully folded, the two locking rods 223 automatically spring into the folding locking hole 221 under the action of the compressed return spring 225. At the same time, the leg locking piece 2262 automatically springs into the leg locking hole 2261, realizing automatic locking and ensuring the stability of the workbench folding. Similarly, when the support leg 12 needs to be unfolded, press the unlock drive button again to disengage the locking rod 223 from the folding locking hole 221. At the same time, the leg locking piece 2262 also disengages from the leg locking hole 2261. Then, pull the sliding handle 23 outward. After pulling a short distance, release the unlock drive button 224. During the outward movement of the drive slide rod 212, on the one hand, the hinge seat 213 drives the end of the second leg 1202 near the workbench 11 to move towards the center of the workbench 11, thus causing the other end of the second leg 1202 to move towards the center of the workbench 11. The workbench rotates outwards and unfolds. On the other hand, it drives the partition connecting nail 2144 to move to the corresponding outer side. The partition connecting nail 2144 pulls the second zipper 2147. The second zipper 2147 pulls the end of the first leg 1201 near the table surface to move towards the center of the table surface through the sliding mounting base 2145, thereby driving the other end of the first leg 1201 to rotate outwards and unfold, realizing the switching of the unfolded state of the workbench. When fully unfolded, the two locking rods 223 automatically spring into the unfolding locking hole 222 to achieve automatic locking and ensure the stability of the unfolded workbench.

Claims

1. A multi-linkage folding workbench, comprising a workbench plate (11) and two sets of support legs (12), each set of support legs (12) consisting of two legs (121) and a crossbar (122) connecting the two legs (121), each leg (121) being hinged to the lower end of the workbench plate (11) via a hinge rod (13), the two support legs (12) being a first leg (1201) and a second leg (1202); characterized in that, A synchronous linkage and locking device (20) is also provided between the two support legs (12) and the worktable (11). The synchronous linkage and locking device (20) is symmetrically arranged and includes: The leg linkage structure (21) is used to drive the two support legs (12) to rotate inward or outward synchronously. It is provided in two sets, which are slidably installed in the two slide rails (111) at the lower end of the workbench (11). The two slide rails (111) are arranged in parallel and from one set of support legs (12) toward the other set of support legs (12). The two leg linkage structure (21) is hinged to the two support legs (12) through two common hinged connecting rods (211). The hinged connecting rods (211) are hinged to the end of the support leg (12) near the workbench (11). The locking structure (22) can be separated from the tripod linkage structure (21) and is used to simultaneously restrict the movement of the tripod linkage structure (21). When the two support tripods (12) are fully folded or fully unfolded by moving the tripod linkage structure (21), it can automatically engage with the tripod linkage structure (21) to achieve locking.

2. The multi-linkage folding worktable according to claim 1, characterized in that, The tripod linkage structure (21) includes a drive slide rod (212) slidably installed in the slide rail (111). One end of the drive slide rod (212) is hinged to the hinge link (211) at the second tripod (1202) through a hinge seat (213) fixed thereto. The other side of the drive slide rod (212) is hinged to the hinge link (211) at the first tripod (1201) through a pull-lock linkage assembly (214). The movement of the drive slide rod (212) can simultaneously drive the hinge links (211) of the two support tripods (12) to move in the opposite direction.

3. The multi-linkage folding worktable according to claim 2, characterized in that, The zipper linkage assembly (214) includes: Mounting housing (2141) is detachably connected to workbench (11) and forms a cavity with workbench (11) for mounting the following components; The first fixed pulley (2142) is fixedly installed inside the cavity; The partition connecting pin (2144) is fixed to the drive slide bar (212). The sliding mounting base (2145) is slidably mounted in the slide rail (2148) of the mounting housing (2141) and is hinged to the hinge link (211) of the first leg (1201); The first zipper (2146) is fixed at one end to the sliding mounting base (2145) and at the other end to the partition connecting nail (2144), and moves around the first fixed pulley (2142) in the middle.

4. The multi-linkage folding worktable according to claim 3, characterized in that, The zipper linkage assembly (214) further includes a second fixed pulley (2143) and a second zipper (2147), wherein the second fixed pulley (2143) is fixedly installed in the cavity; the partition connecting pin (2144) is located between the first fixed pulley (2142) and the second fixed pulley (2143); one end of the second zipper (2147) is fixedly connected to the sliding mounting base (2145), the other end is fixedly connected to the partition connecting pin (2144), and the second fixed pulley (2143) is bypassed in the middle.

5. The multi-linkage folding worktable according to claim 2, characterized in that, The slide (111) is connected to the outside at one end near the first stand (1201), and a sliding handle (23) is connected between the two drive slide rods (212) on this side. The sliding handle (23) is always exposed outside this side of the worktable (11).

6. The multi-linkage folding worktable according to claim 3, characterized in that, The locking structure (22) is located on the side near the first tripod (1201) and includes: The folding locking hole (221) and unfolding locking hole (222) are provided in two sets corresponding to the bipod linkage structure (21), and each set passes through the slide rail (111) and the corresponding drive slide rod (212). The locking rod (223) has two rods facing the two drive slide rods (212) respectively. It can be detachably plugged into the folding locking hole (221) and the unfolding locking hole (222). When the support leg (12) is fully folded, the locking rod (223) is aligned with the folding locking hole (221). When the support leg (12) is fully unfolded, the locking rod (223) is aligned with the unfolding locking hole (222). The unlocking drive key (224) is slidably installed in the mounting slot (112) of the worktable (11) with one end always exposed outside the side wall of the worktable (11). It also works in conjunction with the two locking rods (223). As the unlocking drive key (224) slides, it drives the two locking rods (223) to move closer to each other. The restoring spring (225) is installed in the mounting slot (112) and stably connected between the two locking rods (223). When the restoring spring (225) is at its original length, the two locking rods (223) can be stably inserted into the folding locking hole (221) or unfolding locking hole (222).

7. The multi-linkage folding worktable according to claim 6, characterized in that, The unlocking drive key (224) has two wedge-shaped holes (2241) symmetrically provided. The two wedge-shaped holes (2241) are slidably connected to the pins (2231) of the two locking rods (223). The wedge-shaped holes (2241) have guide slopes (2242), which are always in contact with the pins (2231).

8. The multi-linkage folding worktable according to claim 6, characterized in that, The second leg (1202) has two legs (121) with leg locking holes (2261) and two locking rods (223) with leg locking parts (2262) on the side near the corresponding drive slide rod (212). The ends of the leg locking parts (2262) are elastic so that they can be separated and inserted into the leg locking holes (2261).

9. The multi-linkage folding worktable according to claim 8, characterized in that, The foot lock (2262) passes through the mounting housing (2141), and the foot lock (2262) also has a recessed movable space corresponding to the cavity of the mounting housing (2141) to avoid interference with the movement of other components in the mounting housing (2141).

10. The multi-linkage folding worktable according to claim 8, characterized in that, When the two support legs (12) are fully folded, the first leg (1201) is confined between the second leg (1202) and the workbench (11).

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