Limiting structure of swing shovel trigger

Abstract

The utility model belongs to the technical field of electric tools, and particularly relates to a limiting structure of a swing shovel trigger, which comprises a head shell and a trigger, a locking rod and an elastic piece are arranged in the head shell, the front end of the trigger is rotatably arranged on the head shell and abuts against the locking rod, a mounting groove is arranged on the head shell, and a limiting mechanism is slidably arranged in the mounting groove. The limiting mechanism is located below the rear end of the trigger, a limiting part is arranged on the limiting mechanism in a protruding mode, a containing groove is formed in the lower surface of the trigger, when the limiting part corresponds to the containing groove in position, after the trigger is driven to reset, the containing groove can coincide with the limiting part, at the moment, the trigger is flush with the head shell, and after the limiting part is driven to slide, the limiting part and the containing groove are staggered in position. At the moment, after the trigger is driven to reset, the lower surface of the trigger can abut against the limiting part, so that the trigger is limited to be flush with the head shell, the structure is simple, the head shell is provided with the limiting mechanism for limiting the trigger to directly reset to the initial position, and the safety is higher when a user pokes the trigger buckle to reset.

Description

Technical Field

[0001] This utility model belongs to the field of power tool technology, and specifically refers to a limiting structure for a swing shovel trigger. Background Technology

[0002] A swivel shovel, also known as a multi-tool, is a reciprocating swivel motorized tool. A motor inside the housing drives a blade connected to an output shaft in a reciprocating motion. By changing the blade mounted on the head, the swivel shovel can perform multiple functions such as cutting, grinding, scraping, rough filing, and polishing, making it convenient and practical. For example, in Chinese patent CN105728846B, when the user moves the quick-change lever back, the spring collet is pushed upwards by a compression spring, and a second compression spring lifts the movable rod and tensioning rod together. The end of the spring collet opens up due to the pressure from the slope of the blade holder's inner wall, fixing the saw blade to the blade holder, thus achieving quick blade changing. However, because there is no limiting structure on the head housing to prevent the quick-change trigger from resetting, the upward movement of the movable rod can cause the quick-change trigger to return directly to its initial position. During this process, the operator's fingers are easily caught in the quick-change trigger, leading to finger injuries. The safety of this type of swivel shovel needs improvement. Summary of the Invention

[0003] The purpose of this utility model is to provide a simple structure with a limiting mechanism on the head shell that prevents the trigger from directly resetting to the initial position, thereby avoiding the situation where the trigger pinches the user's fingers and making it safer for the user to push the lever back to reset.

[0004] The purpose of this utility model is achieved as follows:

[0005] A limiting structure for a swing shovel trigger includes a head shell and a trigger rotatably mounted on the head shell. The head shell contains a locking rod for locking the saw blade, a push locking rod, and an elastic element for resetting the trigger. The front end of the trigger is rotatably mounted on the head shell and abuts against the locking rod. The head shell has a mounting groove, and a limiting mechanism is slidably mounted within the mounting groove. The limiting mechanism is located below the rear end of the trigger and has a protruding limiting part. The lower surface of the trigger has a receiving groove. When the limiting part corresponds to the receiving groove, after the trigger is reset, the receiving groove coincides with the limiting part, and the trigger is flush with the head shell. After the limiting part slides, the limiting part and the receiving groove are misaligned. After the trigger is reset, the lower surface of the trigger abuts against the limiting part, thus limiting the trigger from flushing with the head shell, and a protective space is formed between the trigger and the head shell.

[0006] Furthermore, the limiting mechanism includes a limiting block and a pushing spring disposed in the mounting groove, the limiting part is disposed on the limiting block, and the two ends of the pushing spring abut against the inner wall of the mounting groove and the limiting block, respectively.

[0007] Furthermore, pushing holes are provided on the inner walls of both sides of the mounting groove, and pushing rods are provided on both sides of the limiting block. The pushing rods on both sides of the limiting block are slidably disposed in the pushing holes on both sides of the inner wall of the mounting groove.

[0008] Furthermore, the limiting mechanism also includes a mounting rod installed in the mounting groove, a sliding hole is provided on the limiting block, the mounting rod is disposed in the sliding hole, the limiting block can slide along the mounting rod, and the push spring is sleeved on the mounting rod.

[0009] Furthermore, the inner wall of the sliding hole is provided with an abutment platform, and one end of the push spring is located inside the sliding hole and abuts against the abutment platform.

[0010] Furthermore, the receiving groove is located in the middle of the lower surface of the trigger, and the shape of the receiving groove is an inverted triangle, while the shape of the limiting part is an equilateral triangle and is adapted to the shape of the receiving groove.

[0011] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0012] This utility model belongs to the field of power tool technology, specifically referring to a limiting structure for a swing shovel trigger. It includes a head housing and a trigger rotatably mounted on the head housing. Inside the head housing are a locking rod for locking the saw blade, a push-locking rod, and an elastic element for resetting the trigger. The front end of the trigger is rotatably mounted on the head housing and abuts against the locking rod. When the user wants to replace the saw blade, the user can rotate the trigger to move the locking rod downwards, thus replacing the saw blade. This method of replacing the saw blade by moving the locking rod downwards via the trigger is a conventional structure for swing shovels on the market. The elastic element is a common high-strength spring. When the locking rod moves downwards... Movement compresses the powerful spring, and a limiting mechanism slides within the mounting slot on the headstock. This limiting mechanism is located below the rear end of the trigger, allowing the trigger to smoothly engage with it after reset. The limiting mechanism has a protruding limiting part, and the lower surface of the trigger has a receiving groove. When the limiting part aligns with the receiving groove, the user's trigger reset will cause the receiving groove to overlap with the limiting part, allowing the limiting part to enter the receiving groove. At this point, the trigger is flush with the headstock. When the user rotates the trigger, the receiving groove separates from the limiting part, allowing the user to move the limiting mechanism within the headstock. The trigger slides laterally within the slot. The movement of the limiting mechanism causes the limiting part to move synchronously, misaligning it with the receiving slot. After the user resets the trigger, the lower surface of the trigger abuts against the limiting part, preventing the trigger from touching the headstock. A protective space is formed between the trigger and the headstock to prevent the compressed spring from pushing the trigger directly back to its initial position, thus avoiding injury to the user's fingers. The user can then move the limiting mechanism laterally in the opposite direction to allow the limiting part to re-enter the receiving slot, allowing the trigger to reset normally to its initial position. The position allows the compressed push spring to properly push the locking rod to reset, thereby fixing the saw blade. Compared to the common swing shovel heads on the market that do not have a limiting structure to prevent the trigger from resetting, when the user pulls the trigger back to reset, the trigger will directly return to the initial position. During this process, the operator's fingers are easily caught in the quick-change trigger, resulting in finger injury. However, the swing shovel of this utility model has a limiting mechanism to prevent the trigger from directly resetting to the initial position, thereby avoiding the situation where the trigger will catch the user's fingers and making it safer for the user to pull the trigger back to reset. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention.

[0014] Figure 2 This is a cross-sectional view of the trigger of this utility model.

[0015] Figure 3 This is an exploded view of the head shell and trigger of this utility model.

[0016] Figure 4This is a perspective view of the trigger of this utility model.

[0017] Figure 5 This is a schematic diagram of the structure of the limiting block and the head shell of this utility model.

[0018] Figure 6 This is a schematic diagram of the structure of the limiting block and the head shell of this utility model.

[0019] Figure 7 This is an exploded view of the head shell and limiting mechanism of this utility model.

[0020] Figure 8 This is a three-dimensional view of the limiting mechanism of this utility model.

[0021] Figure 9 This is an exploded view of the limiting block and mounting rod of this utility model.

[0022] Figure 10 This is a reference diagram showing the state of the trigger of this utility model after it has been rotated.

[0023] Figure 11 This is a reference diagram showing the state in which the trigger and the limiting part of this utility model are in contact.

[0024] Figure 12 This is a cross-sectional view of the trigger and limiting part of this utility model.

[0025] Figure 13 This is a perspective view of the head shell of this utility model.

[0026] The meaning of the labels in the diagram:

[0027] 1-Head shell; 2-Trigger; 3-Locking rod; 4-Elastic element; 21-Mounting slot; 22-Limit block;

[0028] 23-Limiting part; 24-Receiving groove; 32-Mounting rod; 33-Sliding hole; 34-Push spring;

[0029] 35-Abutting platform; 36-Pushing hole; 37-Push rod. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments:

[0031] This utility model belongs to the field of power tool technology, specifically referring to a limiting structure for a swing shovel trigger. It includes a head housing 1 and a trigger 2 rotatably mounted on the head housing 1. Inside the head housing 1 are a locking rod 3 for locking the saw blade and an elastic element 4 for pushing the locking rod 3 and resetting the trigger 2. The front end of the trigger 2 is rotatably mounted on the head housing 1 and abuts against the locking rod 3. When the user wants to replace the saw blade, the user can rotate the trigger 2 to move the locking rod 3 downwards, thus replacing the saw blade. This method of replacing the saw blade by moving the locking rod 3 downwards via the trigger 2 is a conventional structure for swing shovels on the market. The elastic element 4 is a common high-strength spring. When the locking rod 3 moves downwards... A powerful spring is compressed, and a limiting mechanism is slidably installed in the mounting groove 21 on the head shell 1. The limiting mechanism is located below the rear end of the trigger 2, so that the trigger 2 can smoothly abut against the limiting mechanism after resetting. The limiting mechanism has a protruding limiting part 23, and a receiving groove 24 is opened on the lower surface of the trigger 2. When the limiting part 23 and the receiving groove 24 are aligned, the receiving groove 24 will overlap with the limiting part 23 after the user drives the trigger 2 to reset, so that the limiting part 23 enters into the receiving groove 24, and the trigger 2 is flush with the head shell 1. When the user drives the trigger 2 to rotate, the receiving groove 24 will separate from the limiting part 23, and the user can then drive the trigger 2 to reset. The moving limiting mechanism slides laterally within the mounting groove 21. The movement of the limiting mechanism causes the limiting part 23 to move synchronously. At this time, the limiting part 23 is misaligned with the receiving groove 24. After the user drives the trigger 2 to reset, the lower surface of the trigger 2 will abut against the limiting part 23, thus preventing the trigger 2 from being flush with the head shell 1. A protective space is formed between the trigger 2 and the head shell 1 to prevent the compressed spring from pushing the trigger 2 directly back to its initial position flush with the head shell 1, which could pinch the user's finger. The user can move the limiting mechanism laterally in the opposite direction to allow the limiting part 23 to re-enter the receiving groove 24. At this time, the trigger 2... Only then can it be properly reset to the initial position, allowing the compressed push spring 34 to properly push the locking rod 3 to reset, thereby fixing the saw blade. Compared to the common swing shovel head shell 1 on the market, which does not have a limiting structure to restrict the trigger 2 from resetting, when the user pulls the trigger 2 back to reset, the trigger 2 will directly return to the initial position. During this process, the operator's fingers are easily pinched by the quick-change trigger 2, resulting in finger injury. However, the swing shovel of this utility model has a limiting mechanism to restrict the trigger 2 from resetting directly to the initial position, thereby avoiding the situation where the trigger 2 pinches the user's fingers and making it safer for the user to pull the trigger back to reset.

[0032] Preferably, the limiting mechanism includes a limiting block 22 and a pushing spring 34 disposed in the mounting groove 21. The limiting part 23 is disposed on the limiting block 22, and the two ends of the pushing spring 34 abut against the inner wall of the mounting groove 21 and the limiting block 22, respectively. Since the limiting part 23 is disposed on the limiting block 22, and the two ends of the pushing spring 34 abut against the inner wall of the mounting groove 21 and the limiting block 22, and the limiting part 23 is disposed on the limiting block 22, when the limiting part 23 is located in the receiving groove 24, the limiting mechanism is effective. The push spring 34 between block 22 and the inner wall of mounting groove 21 is in a compressed state. When the user turns the trigger 2 and the limiting part 23 is disengaged from the receiving groove 24, the compressed push spring 34 will push the limiting block 22 to move laterally. Thus, when the user turns the trigger 2, the limiting block 22 can move laterally automatically without the user having to move the limiting block 22 manually. After the user pulls the trigger 2 back to reset, the trigger 2 cannot be directly reset to the initial position, ensuring that the trigger 2 cannot cause injury to the user's fingers.

[0033] Preferably, the inner walls on both sides of the mounting groove 21 are provided with pushing holes 36, and the limiting block 22 is provided with pushing rods 37 on both sides. The pushing rods 37 on both sides of the limiting block 22 are slidably disposed in the pushing holes 36 on both sides of the inner wall of the mounting groove 21. When the limiting part 23 abuts against the lower surface of the trigger 2, since the pushing rods 37 on both sides of the limiting block 22 are slidably disposed in the pushing holes 36 on both sides of the inner wall of the mounting groove 21, the user can push the limiting block 22 to move laterally by pushing the pushing rods 37, so that the limiting part 23 on the limiting block 22 can re-enter the receiving groove 24 on the lower surface of the trigger 2. At this time, the method of pushing the limiting block 22 to move is simple in structure and convenient for the user to control the limiting block 22 to move laterally.

[0034] Preferably, the limiting mechanism further includes a mounting rod 32 mounted in the mounting groove 21. The limiting block 22 has a sliding hole 33, and the mounting rod 32 is disposed in the sliding hole 33. The limiting block 22 can slide along the mounting rod 32. The push spring 34 is sleeved on the mounting rod 32. The mounting rod 32 is fixedly mounted in the mounting groove 21, and the limiting block 22 is sleeved on the mounting rod 32 through the sliding hole 33 on the limiting block 22, so that the limiting block 22 can slide along the mounting rod 32. The push spring 34 in the mounting groove 21 is sleeved on the mounting rod 32, so that the push spring 34 can be restricted from moving freely in the mounting groove 21, ensuring that both ends of the push spring 34 can always abut against the inner wall of the mounting groove 21 and the limiting block 22, so that after the trigger 2 is rotated, the push spring 34 can smoothly push the limiting block 22 to move.

[0035] Preferably, the inner wall of the sliding hole 33 is provided with an abutment platform 35, and one end of the push spring 34 is located inside the sliding hole 33 and abuts against the abutment platform 35. Since one end of the push spring 34 is located inside the sliding hole 33 and abuts against the abutment platform 35 on the inner wall of the sliding hole 33, it can be ensured that one end of the push spring 34 can abut against the limiting block 22 at all times, making the abutment between one end of the push spring 34 and the abutment platform 35 more stable.

[0036] Preferably, the receiving groove 24 is located in the middle of the lower surface of the trigger 2, and the shape of the receiving groove 24 is an inverted triangle. The shape of the limiting part 23 is an equilateral triangle and is adapted to the shape of the receiving groove 24. Since the shape of the receiving groove 24 is an inverted triangle and the shape of the limiting part 23 is an equilateral triangle, when the limiting part 23 enters the receiving groove 24, there will be no shaking between the trigger 2 and the limiting part 23. When the limiting part 23 abuts against the lower surface of the trigger 2, the contact area between the limiting part 23 and the trigger 2 is small, thereby reducing the friction generated when the user pushes the limiting block 22, making it easier and less strenuous for the user to push the limiting block 22.

[0037] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A limiting structure for a swing shovel trigger, comprising a head shell (1) and a trigger (2) rotatably mounted on the head shell (1), characterized in that: The head shell (1) is provided with a locking rod (3) for locking the saw blade and an elastic element (4) for pushing the locking rod (3) and resetting the trigger (2). The front end of the trigger (2) is rotatably mounted on the head shell (1) and abuts against the locking rod (3). The head shell (1) is provided with a mounting groove (21). A limiting mechanism is slidably provided in the mounting groove (21). The limiting mechanism is located below the rear end of the trigger (2). A limiting part (23) protrudes from the limiting mechanism. A receiving groove (24) is provided on the lower surface of the trigger (2). The limiting part (23) protrudes from the limiting mechanism. 3) When the position corresponds to the receiving groove (24), after the drive trigger (2) is reset, the receiving groove (24) can coincide with the limiting part (23), and at this time the trigger (2) is flush with the head shell (1). After the limiting part (23) is driven to slide, the position of the limiting part (23) and the receiving groove (24) are misaligned. After the drive trigger (2) is reset, the lower surface of the trigger (2) can abut against the limiting part (23), thereby restricting the trigger (2) from being flush with the head shell (1), and at this time a protective space is formed between the trigger (2) and the head shell (1).

2. The limiting structure of the swing shovel trigger according to claim 1, characterized in that: The limiting mechanism includes a limiting block (22) and a push spring (34) disposed in the mounting groove (21). The limiting part (23) is disposed on the limiting block (22). The two ends of the push spring (34) abut against the inner wall of the mounting groove (21) and the limiting block (22) respectively.

3. The limiting structure of the swing shovel trigger according to claim 2, characterized in that: Pushing holes (36) are provided on the inner walls of both sides of the mounting groove (21), and pushing rods (37) are provided on both sides of the limiting block (22). The pushing rods (37) on both sides of the limiting block (22) are slidably disposed in the pushing holes (36) on both sides of the inner wall of the mounting groove (21).

4. The limiting structure of the swing shovel trigger according to claim 2, characterized in that: The limiting mechanism also includes a mounting rod (32) mounted in the mounting groove (21), a sliding hole (33) is provided on the limiting block (22), the mounting rod (32) is set in the sliding hole (33), the limiting block (22) can slide along the mounting rod (32), and the push spring (34) is sleeved on the mounting rod (32).

5. The limiting structure of the swing shovel trigger according to claim 4, characterized in that: The inner wall of the sliding hole (33) is provided with an abutment platform (35), and one end of the push spring (34) is located inside the sliding hole (33) and abuts against the abutment platform (35).

6. The limiting structure of a swing shovel trigger according to any one of claims 1-5, characterized in that: The receiving groove (24) is located in the middle of the lower surface of the trigger (2), and the shape of the receiving groove (24) is an inverted triangle. The shape of the limiting part (23) is an equilateral triangle and is adapted to the shape of the receiving groove (24).

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