A switch cabinet drawer hand-pulling and pushing mechanism

Abstract

The utility model discloses a switchgear drawer hand pull mechanism of advancing, including the baffle and the mechanism bottom plate of push and pull movement on the baffle, the mechanism bottom plate is set up on the side lock board with the movable setting of along the direction, be provided with the lock bar on the side lock board, be provided with three work position locating blocks on the baffle, be provided with the opening slot for accommodating the lock bar on three work position locating blocks, be provided with the side lock hole for the side lock column of wearing on the side lock board, the side lock hole includes the narrow hole for the side lock column of axial limit, the utility model discloses three work position locating blocks's multiple opening slot and the lock bar cooperation structure of side lock board drive, realize the drawer multiple position accurate locking of multiple locking point, and three work position locating blocks and the locking structure of lock bar are independent of the connecting structure between the drawer and switchgear, are not influenced by the drawer big dead weight, effectively guarantee the service life, ensure accurate locking position.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage switchgear and relates to a hand-pull push mechanism for a switch cabinet drawer. Background Technology

[0002] In low-voltage switchgear, the drawers inside the switch cabinet are equipped with a large number of high-current components to form an integrated multi-functional working unit, which is an important part of the switch cabinet.

[0003] In existing switchgear, the drawers have multiple working positions within the switchgear to accommodate different testing tasks. Due to the high precision requirements of high-current equipment connections, users have very high requirements for the position of the drawers when pushing them in and pulling them out of the switchgear. However, due to the large number of components, the weight of the drawers is generally around tens of kilograms. The user's control over the drawers is affected by various factors, such as the impact of the drawer's own weight on the positioning and locking structure, and the inertia caused by excessive weight. Traditional positioning and locking structures are difficult to bear heavy loads and are prone to deformation, skipped teeth, and thread breakage during long-term use. All of these factors lead to inaccurate positioning of the drawers, unsmooth switching between multiple positions, and difficulty in locking the drawers in multiple positions. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a hand-pull push mechanism for a switch cabinet drawer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A drawer push-pull mechanism for a switch cabinet includes a partition and a mechanism base plate that moves on the partition. A side locking plate is movably provided on the mechanism base plate along a predetermined direction. A locking rod is provided on the side locking plate. A three-position positioning block is provided on the partition. The three-position positioning block is provided with an opening groove for accommodating the locking rod. A side locking hole is provided on the side locking plate for a side locking pin to pass through. The side locking hole includes a narrow hole for axially limiting the side locking pin and an enlarged hole for limiting the side locking pin along the moving direction of the side locking plate. The narrow hole and the enlarged hole are connected. The three-position positioning block also includes a plurality of bosses and grooves that are alternately connected in sequence. One end of the side locking pin abuts against the surface of the boss or the groove.

[0006] Furthermore, the plurality of opening slots are distributed at intervals along the pushing and pulling direction of the mechanism base plate, the bosses and the grooves are alternately connected along the pushing and pulling direction of the mechanism base plate, and the opening slots and the grooves are aligned in the pushing and pulling direction perpendicular to the mechanism base plate.

[0007] Furthermore, it also includes a slider, a third spring is provided between the slider and the three-position positioning block, and the slider is respectively provided with a first stop block located in the opening groove and a second stop block located in the groove, the surface of the second stop block being flush with the top of the boss.

[0008] Furthermore, it also includes a second spring that provides elastic force to the side locking pin toward the three-position positioning block.

[0009] Furthermore, the side lock pin is provided with a columnar portion and a waist-shaped portion in sequence along the axial direction. The outer diameter of the waist-shaped portion is smaller than the outer diameter of the columnar portion. The outer diameter of the columnar portion is slightly smaller than the inner diameter of the enlarged hole and larger than the inner diameter of the narrow hole. The outer diameter of the waist-shaped portion is smaller than the inner diameter of the narrow hole.

[0010] Furthermore, a fixing plate is fixedly installed on the base plate of the mechanism, an unlocking push plate is inserted through the fixing plate, a first spring is provided between the unlocking push plate and the fixing plate, and a sliding groove for the locking rod to pass through is provided on the unlocking push plate, the sliding groove forming a set acute angle with the movement direction of the side locking plate.

[0011] Furthermore, it also includes a position indicating component, which includes a fixed rod fixedly connected to the base plate of the mechanism. An indicating slider and a fourth spring are axially threaded through the fixed rod. The two ends of the fourth spring are respectively connected to the indicating slider and the fixed rod. A limit block is provided on the partition plate. A collision block that abuts against the limit block is provided at the bottom of the indicating slider. An indicating rod is also threaded through the indicating slider. The indicating rod is rotatably connected to the base plate of the mechanism. The movement of the indicating slider drives the rotation of the indicating rod. An indicating mark is provided at the end of the indicating rod.

[0012] Furthermore, the outer periphery of the indicator rod is provided with a spiral groove along the axial direction, and an indicator guide post is provided on the indicator slider. One end of the indicator guide post is connected to the spiral groove, and the other end is provided with a fifth spring for the indicator guide post to extend into the spiral groove.

[0013] Furthermore, it also includes a square rod support, on which a chain square rod is movably inserted. A square rod chain plate is connected to the square rod support via a rotating shaft. An arc groove is formed on the square rod chain plate. One end of the chain square rod is provided with a sliding shaft for passing through the arc groove. The rotation of the square rod chain plate drives the lifting and lowering of the chain square rod. The front end of the partition is provided with a flange for abutting against the lower end of the chain square rod.

[0014] Furthermore, the interlocking rod is provided with a protrusion for abutting against the unlocking push plate in the direction of movement of the unlocking push plate.

[0015] In summary, the advantages of this utility model are as follows: This utility model employs a three-position positioning block with multiple opening slots and a locking rod driven by a side locking plate to achieve precise locking of drawers at multiple locking points. Furthermore, the locking structure of the three-position positioning block and the locking rod is independent of the connection structure between the drawer and the switch cabinet, unaffected by the drawer's weight, effectively ensuring service life and guaranteeing accurate locking positions. The side locking plate is equipped with a side locking hole that works with a side locking post to achieve dual-direction limiting, allowing the side locking plate and locking rod to switch between locking and unlocking during movement. Only one unlocking operation is required to automatically lock the side locking plate at the next position. It also supports one-step unlocking and locking operations across multiple positions, greatly optimizing the operation logic and convenience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the drawer and partition of this utility model.

[0017] Figure 2 This is a structural diagram of the base plate and partition of the mechanism.

[0018] Figure 3 This is a structural diagram of the base plate of the mechanism.

[0019] Figure 4 for Figure 3 The top view in the image.

[0020] Figure 5 This is a structural diagram of the unlocking push plate and side lock plate.

[0021] Figure 6 This is a schematic diagram of the structure of the three-station positioning block.

[0022] Figure 7 This is a schematic diagram of the positioning component when it is locked in the connected position.

[0023] Figure 8 This is a schematic diagram of the structure when the positioning component is unlocked in the connected position.

[0024] Figure 9 This is a structural diagram of the position indicator component.

[0025] Figure 10 for Figure 3 The front view in the image.

[0026] Figure 11 This is a schematic diagram of the interlocking square rod structure.

[0027] The diagram shows the following markings: 11. Mechanism base plate; 12. Partition plate; 21. Fixing frame; 22. Unlocking push plate; 221. Slide groove; 23. Side locking plate; 231. Side locking hole; 24. Locking rod; 25. Side locking post; 26. Three-position positioning block; 261. Opening groove; 262. Boss; 263. Groove; 264. First stop block; 265. Second stop block; 31. Fixing rod; 32. Indicator slider; 321. Collision block; 322. Limiting block; 33. Fourth spring; 34. Indicator rod; 341. Spiral groove; 35. Indicator guide post; 41. Square rod bracket; 42. Square rod interlocking plate; 421. Arc groove; 43. Interlocking square rod; 431. Protrusion. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0031] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0032] A hand-operated push mechanism for a switch cabinet drawer is installed inside the switch cabinet and used for pushing and pulling the drawer inward and outward relative to the switch cabinet. (Refer to...) Figure 1The drawer push-pull mechanism includes a partition 12 installed inside the switch cabinet and a mechanism base plate 11 installed on the partition 12. Electrical components are installed on the mechanism base plate 11, and contacts for connecting to the electrical components are installed inside the switch cabinet. A slide rail is installed on the partition 12, and the mechanism base plate 11 is connected to the slide rail, so that the mechanism base plate 11 can move along the slide rail on the partition 12 to realize pushing and pulling relative to the switch cabinet. In addition, the mechanism base plate 11 has three specific position states relative to the switch cabinet during the pushing and pulling process, including a connection position, a test position, and an isolation position. The positional relationship of the connection position, test position, and isolation position is arranged sequentially from the inside to the outside of the switch cabinet. The three positions represent three states: the drawer electrical components are connected to the switch cabinet with a large current, the drawer electrical components are connected to the switch cabinet with a small current, and the drawer electrical components are disconnected from the switch cabinet.

[0033] The base plate 11 of the mechanism is provided with a positioning component and a position indicator component. The positioning component is used to lock the base plate 11 in three position states, and the position indicator component is used to indicate the current position of the base plate 11.

[0034] Reference Figures 2 to 6 The positioning assembly includes a three-position positioning block 26, a fixing frame 21, an unlocking push plate 22, a locking rod 24, and a side locking plate 23. The fixing frame 21 is fixedly installed on the base plate 11 of the mechanism by welding or bolt connection. The fixing frame 21 has a first groove for the unlocking push plate 22 to pass through and for the unlocking push plate 22 to reciprocate in a first direction. The fixing frame 21 also has a second groove for the side locking plate 23 to pass through and for the side locking plate 23 to reciprocate in a second direction. Preferably, the first direction and the second direction are... The locking rod 24 is fixedly connected to the side locking plate 23 in a vertical direction. The unlocking push plate 22 has a groove 221 along the third direction. The locking rod 24 passes through the groove 221 and can move horizontally along the third direction within the groove 221. By setting the third direction of the groove 221 to form an acute angle with the first direction and the second direction respectively, when the unlocking push plate 22 moves horizontally along the first direction, the groove 221 will exert a force on the locking rod 24 to drive the side locking plate 23 to move horizontally along the second direction.

[0035] The three-position positioning block 26 is mounted on the partition plate 12 and is fixedly connected to the partition plate 12. The lower end of the locking rod 24 passes through the mechanism base plate 11 and extends toward the partition plate 12. The three-position positioning block 26 is provided with multiple opening slots 261 for engaging with the lower end of the locking rod 24. The opening slots 261 have a U-shaped opening structure. The multiple opening slots 261 are distributed sequentially at a set interval along the pushing and pulling direction of the mechanism base plate 11. The two moving positions of the side locking plate 23 and the locking rod 24 in the second direction are the locked position and the unlocked position, respectively. When in the unlocked position... The locking rod 24 is located outside the opening slot 261. When the mechanism base plate 11 is pushed or pulled, the locking rod 24 does not contact the three-position positioning block 26, so that the mechanism base plate 11 can switch between the connection position, the test position and the isolation position. When it is in the locked position, the locking rod 24 can enter any one of the opening slots 261. The locking rod 24 is restricted by the opening slot 261 so that the mechanism base plate 11 cannot be pushed or pulled, thus achieving the locking effect. The positions of the locking rod 24 in the three opening slots 261 correspond to the connection position, the test position and the isolation position of the mechanism base plate 11, respectively.

[0036] A first spring is provided between the unlocking push plate 22 and the fixing bracket 21. The first spring provides elastic force in the first direction to the unlocking push plate 22. When no other external force is applied, the first spring provides elastic force to the unlocking push plate 22 and the side locking plate 23 to maintain the locked position. When the unlocking push plate 22 is pushed to compress the first spring, it can be maintained in the unlocked position.

[0037] To optimize the user experience, the positioning assembly also includes a side locking post 25. The side locking post 25 is connected to the fixing frame 21 via a second spring. The second spring provides a downward elastic force to the side locking post 25 toward the partition plate 12. The lower half of the side locking post 25 is configured as a tapered structure for contacting the three-position positioning block 26. The upper half of the side locking post 25 is provided with a columnar part and a waist-shaped part in sequence along the axial direction. The outer diameter of the waist-shaped part is smaller than the outer diameter of the columnar part. The side locking plate 23 is provided with a side locking hole 231, which includes an enlarged hole and a narrow hole that are distributed and connected in sequence along the second direction. The connecting portion of the enlarged hole and the narrow hole allows the waisted portion of the side locking pin 25 to pass through. The inner diameter of the enlarged hole is larger than the outer diameter of the columnar portion, and the inner diameter of the narrow hole is larger than the outer diameter of the waisted portion but smaller than the outer diameter of the columnar portion. The side locking pin 25 is inserted into the enlarged hole. When the columnar portion and the side locking hole 231 are at the same horizontal position in the axial movement position of the side locking pin 25, the side locking plate 23 is blocked by the columnar portion and cannot move in the second direction. When the waisted portion and the side locking hole 231 are at the same horizontal position, the side locking plate 23 can move in the second direction to allow the waisted portion to move between the narrow hole and the enlarged hole.

[0038] Correspondingly, the three-position positioning block 26 is provided with a wave structure, which includes multiple bosses 262 and grooves 263 arranged alternately along the push-pull direction of the mechanism base plate 11. Adjacent bosses 262 and grooves 263 are connected by ramps, and multiple grooves 263 are respectively aligned with multiple opening slots 261 in the direction perpendicular to the push-pull.

[0039] When the base plate 11 is in any of the following positions—connection position, test position, or isolation position—and the side locking plate 23 is in the locked position, the waist portion of the side locking pin 25 is located within the narrow hole of the side locking plate 23. The axial movement of the side locking pin 25 is restricted by this narrow hole. (Refer to...) Figure 7 When the base plate 11 of the operating mechanism is to be pushed forward or pulled out, the unlocking push plate 22 needs to be operated first to move horizontally, which will move the side locking plate 23 from the locked position to the unlocked position. At this time, the side locking hole 231 moves horizontally relative to the side locking pin 25, so that the side locking pin 25 is located in the enlarged hole. Then, the side locking pin 25 is moved axially towards the three-position positioning block 26 by the elastic force of the second spring, so that the columnar part and the side locking hole 231 are at the same horizontal position. Then, the side locking pin 25 abuts against the side locking plate 23, keeping the side locking plate 23 in the unlocked position, so that the base plate 11 of the mechanism can perform push and pull operations.

[0040] When the operating mechanism base plate 11 moves from one position to another adjacent position, the side locking plate 23 and the side locking pin 25 in the unlocked position move synchronously under the action of the mechanism base plate 11. The bottom conical structure of the side locking pin 25 contacts the wave structure. The bottom end of the side locking pin 25 moves from the lower end of the wave structure or the bottom of the groove 263 towards the top of the adjacent boss 262. During the movement, the side locking pin 25 undergoes an upward axial displacement, causing the columnar part to disengage from the side locking hole 231 and the waisted part to enter the side locking hole 231. At this time, the side locking plate 23 is limited in the second direction. When unlocked, the mechanism base plate 11 moves further, and the bottom of the side locking pin 25 moves from the top of the boss 262 to the bottom of the adjacent groove 263. During the movement, the bottom of the locking rod 24 approaches the opening slot 261 corresponding to the groove 263. Under the action of the first spring, the locking rod 24 enters the opening slot 261, and at the same time, the waist of the side locking pin 25 enters the narrow hole, causing the side locking plate 23 to switch to the locking position. The unlocking push plate 22 pops out and resets. At this time, the mechanism base plate 11 completes the movement and switching from any one of the connection position, test position, and isolation position to another adjacent position.

[0041] In summary, when the mechanism base plate 11 is moving and switching positions, only one press of the unlocking push plate 22 is needed to move the mechanism base plate 11 to complete the switching. There is no need to hold down the unlocking push plate 22 while moving the mechanism base plate 11, which greatly simplifies the operation, improves the safety of operation, and enhances the user experience.

[0042] Furthermore, in order to provide the mechanism base plate 11 with the function of directly switching from the isolation position to the connection position, the three-position positioning block 26 is also provided with a slider. The slider is provided with a first stop 264 and a second stop 265 respectively. The first stop 264 is located in the opening groove 261 corresponding to the connection position and is used to block the opening of the opening groove 261. The second stop 265 is located in the groove 263 corresponding to the connection position, and the top of the second stop 265 is flush with the top of the adjacent boss 262. The slider and the three-position positioning block 26 are movably connected by a third spring, so that the slider can move relative to the three-position positioning block 26 within a set range. When no other external force is applied, the first stop 264 is maintained in the position of blocking the opening of the opening groove 261, and the second stop 265 is maintained in the position of connecting with the adjacent boss 262.

[0043] When the mechanism base plate 11 is to be moved directly from the isolation position to the connection position, continuous pressure is applied to the unlocking push plate 22 to keep the side locking plate 23 and the locking rod 24 in the unlock position. At this time, the side locking pin 25 is located in the enlarged hole. Pushing the mechanism base plate 11 allows the side locking pin 25 to pass through the wave structure without contacting the side locking plate 23. At this time, the mechanism base plate 11 can be moved directly from the isolation position to the connection position. After the mechanism base plate 11 moves to the connection position, the bottom end of the side locking pin 25 abuts against the top of the second stop block 265, so that the waist of the side locking pin 25 is at the same horizontal position as the side locking hole 231. (Refer to...) Figure 8 At this point, the pressing effect on the unlocking push plate 22 is released, causing the unlocking push plate 22 to rebound and reset under the action of the first spring, driving the side lock plate 23 to move to the locked position. The waist of the side lock pin 25 enters the narrow hole, and the lock rod 24 enters the opening slot 261, completing the locking action. Simultaneously, as the lock rod 24 moves into the opening slot 261, it pushes the first stop 264. The slider moves, causing the second stop 265 to move and disengage from the bottom end of the side lock pin 25, leaving the bottom end of the side lock pin 25 empty. Then, the operation of pressing the unlocking push plate 22 to unlock and the operation of moving the base plate 11 of the mechanism to switch positions can continue.

[0044] To avoid the safety risks caused by the mechanism's base plate 11 being accidentally pulled out excessively, refer to Figure 10 and Figure 11 The base plate 11 of the mechanism is also provided with a square rod support 41 and a locking square rod 43. The locking square rod 43 is set on the square rod support 41 and passes downward through the base plate 11 of the mechanism. The locking square rod 43 can move vertically so that its lower end can contact the partition 12. The front end of the partition 12 is provided with a flange or a step or other protrusion. When the locking square rod 43 is in the downward position, during the outward pulling of the base plate 11 of the mechanism, the locking square rod 43 will push forward against the flange or step, so that the base plate 11 of the mechanism cannot be pulled out further, thus ensuring safety.

[0045] A square rod interlocking plate 42 is provided on the square rod support 41. The square rod interlocking plate 42 is connected to the square rod support 41 through a rotating shaft, so that the square rod interlocking plate 42 can rotate relative to the square rod support 41 with the rotating shaft as the rotation center. The square rod interlocking plate 42 is provided with an arc groove 421, and the center of the arc groove 421 is offset from the center of the rotating shaft by a set distance. The interlocking square rod 43 is provided with a sliding shaft, which passes through the arc groove 421. Thus, under the rotation of the square rod interlocking plate 42, the relative cooperation between the arc groove 421 and the sliding shaft can drive the lifting and lowering action of the interlocking square rod 43. By fixing the rotation angle of the square rod interlocking plate 42, the height position of the interlocking square rod 43 can be set.

[0046] The interlocking rod 43 also has a protrusion 431 protruding towards the unlocking push plate 22. When the interlocking rod 43 presses down against the partition 12, the protrusion 431 presses against the unlocking push plate 22 in the first direction, preventing the unlocking push plate 22 from moving and preventing the side lock plate 23 from moving to the unlock position.

[0047] Reference Figure 2 , Figure 3 , Figure 4 and Figure 9 The position indicator assembly includes a fixed rod 31, a fourth spring 33, an indicator slider 32, an indicator guide post 35, and an indicator rod 34. The fixed rod 31 is fixedly connected to the mechanism base plate 11. The indicator slider 32 is sleeved on the fixed rod 31 and can move relative to the fixed rod 31 along its axial direction. The bottom of the mechanism base plate 11 is slotted. A collision block 321 is provided at the bottom of the indicator slider 32. The collision block 321 passes downward through the mechanism base plate 11 through the slot and extends toward the partition plate 12. The axial direction of the fixed rod 31 is in the same direction as the pushing and pulling direction of the mechanism base plate 11. A limit block 322 is provided on the partition plate 12. During the pushing and pulling movement of the mechanism base plate 11, the collision block 321 can come into contact with the limit block 322.

[0048] The indicator rod 34 is located on one side of the fixed rod 31 and is parallel to the fixed rod 31. The indicator rod 34 passes through the indicator slider 32 and can rotate relative to the indicator slider 32 with its own axis as the center. Furthermore, one end of the indicator rod 34 is rotatably connected to the mechanism base plate 11 through a bearing, and the other end passes forward through the front end of the mechanism base plate 11. The indicator slider 32 has a through hole for the indicator guide post 35 to pass through. The indicator guide post 35 is perpendicular to the indicator rod 34. A spiral groove 341 is formed along the axial direction on the outer periphery of the indicator rod 34. One end of the indicator guide post 35 extends into the spiral groove 341 to form a fit. The other end of the indicator guide post 35 is provided with a fifth spring. The fifth spring provides axial elastic force to the indicator guide post 35, so that the end of the indicator guide post 35 is kept in the spiral groove 341.

[0049] The front end of the indicator rod 34 is provided with a circumferential indicator mark. During the movement of the mechanism base plate 11, the collision block 321 of the indicator slider 32 is abutted by the limiting block 322, and with the action of the fourth spring 33, the indicator slider 32 moves relative to the mechanism base plate 11, thereby driving the indicator guide post 35 to move axially relative to the indicator rod 34. Through the cooperation of the indicator guide post 35 and the spiral groove 341, the indicator rod 34 is driven to rotate. Thus, the circumferential indication change of the indicator mark at the end of the indicator rod 34 can reflect the change in the moving position of the mechanism base plate 11, thereby realizing the indication of the current position of the mechanism base plate 11.

[0050] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A hand-pull push mechanism for a switch cabinet drawer, characterized in that, The device includes a partition (12) and a mechanism base plate (11) that moves on the partition (12). A side locking plate (23) is movably mounted on the mechanism base plate (11) along a predetermined direction. A locking rod (24) is mounted on the side locking plate (23). A three-position positioning block (26) is mounted on the partition (12). The three-position positioning block (26) has an opening slot (261) for accommodating the locking rod (24). A side locking pin (25) is mounted on the side locking plate (23). The side locking hole (231) includes a narrow hole for axially limiting the side locking post (25) and an enlarged hole for limiting the side locking post (25) along the movement direction of the side locking plate (23). The narrow hole and the enlarged hole are connected. The three-position positioning block (26) also includes a plurality of bosses (262) and grooves (263) arranged alternately in sequence. One end of the side locking post (25) abuts against the surface of the boss (262) or the groove (263).

2. The hand-pull push mechanism for a switch cabinet drawer according to claim 1, characterized in that, Multiple opening slots (261) are distributed at intervals along the push-pull direction of the mechanism base plate (11), the boss (262) and the groove (263) are alternately connected along the push-pull direction of the mechanism base plate (11), and the opening slots (261) and the grooves (263) are aligned in the push-pull direction perpendicular to the mechanism base plate (11).

3. The hand-pull push mechanism for a switch cabinet drawer according to claim 2, characterized in that, It also includes a slider, a third spring is provided between the slider and the three-position positioning block (26), and a first stop (264) located in the opening groove (261) and a second stop (265) located in the groove (263) are respectively provided on the slider, and the surface of the second stop (265) is flush with the top of the boss (262).

4. The hand-pull push mechanism for a switch cabinet drawer according to claim 3, characterized in that, It also includes a second spring that provides elastic force to the side lock pin (25) toward the three-position positioning block (26).

5. The hand-pull push mechanism for a switch cabinet drawer according to claim 4, characterized in that, The side lock pin (25) is arranged in a columnar part and a waist-shaped part along the axial direction. The outer diameter of the waist-shaped part is smaller than the outer diameter of the columnar part. The outer diameter of the columnar part is slightly smaller than the inner diameter of the enlarged hole and larger than the inner diameter of the narrow hole. The outer diameter of the waist-shaped part is smaller than the inner diameter of the narrow hole.

6. The hand-pull push mechanism for a switch cabinet drawer according to claim 1, characterized in that, A fixing plate is fixedly installed on the base plate (11) of the mechanism. An unlocking push plate (22) is installed on the fixing plate. A first spring is installed between the unlocking push plate (22) and the fixing plate. A sliding groove (221) for the locking rod (24) to pass through is opened on the unlocking push plate (22). The sliding groove (221) and the moving direction of the side locking plate (23) form a set acute angle.

7. The hand-pull push mechanism for a switch cabinet drawer according to claim 1, characterized in that, It also includes a position indicator component, which includes a fixed rod (31) fixedly connected to the base plate (11) of the mechanism. An indicator slider (32) and a fourth spring (33) are axially inserted on the fixed rod (31). The two ends of the fourth spring (33) are respectively connected to the indicator slider (32) and the fixed rod (31). A limit block (322) is provided on the partition plate (12). A collision block (321) that abuts against the limit block (322) is provided at the bottom of the indicator slider (32). An indicator rod (34) is also inserted on the indicator slider (32). The indicator rod (34) is rotatably connected to the base plate (11) of the mechanism. The movement of the indicator slider (32) drives the rotation of the indicator rod (34). An indicator mark is provided at the end of the indicator rod (34).

8. The hand-pull push mechanism for a switch cabinet drawer according to claim 7, characterized in that, The outer periphery of the indicator rod (34) is provided with a spiral groove (341) along the axial direction. The indicator slider (32) is provided with an indicator guide post (35). One end of the indicator guide post (35) is connected to the spiral groove (341), and the other end is provided with a fifth spring for the indicator guide post (35) to extend into the spiral groove (341).

9. A hand-pull push mechanism for a switch cabinet drawer according to claim 6, characterized in that, It also includes a square rod support (41), on which a chain square rod (43) is movably inserted. A square rod chain plate (42) is connected to the square rod support (41) via a rotating shaft. An arc groove (421) is provided on the square rod chain plate (42). One end of the chain square rod (43) is provided with a sliding shaft for passing through the arc groove (421). The rotation of the square rod chain plate (42) drives the lifting and lowering of the chain square rod (43). The front end of the partition plate (12) is provided with a flange for abutting against the lower end of the chain square rod (43).

10. A hand-pull push mechanism for a switch cabinet drawer according to claim 9, characterized in that, The interlocking bar (43) is provided with a protrusion (431) for abutting against the unlocking push plate (22) in the direction of movement of the unlocking push plate (22).

Images