Base plate adjustment replacement structure of jigsaw and jigsaw

Abstract

The utility model discloses to solve the single bottom plate angle adjusting mode in the existing curve saw, and the difficult replacement adjustment problem, provide a kind of bottom plate adjusting replacement structure and curve saw of curve saw, wherein bottom plate adjusting replacement structure, including bottom plate, still include replacement locking structure, compression plate and locking plate, locking structure includes compression rod and adjusting assembly;Wherein locking plate is fixedly arranged in the bottom of the shell of curve saw, close to the part of saw blade in curve saw;Locking plate and bottom plate are attached, and the attachment surface of locking plate and bottom plate is the curved surface of cylindrical shape;Compression plate is set in the side of bottom plate away from locking plate;Compression rod passes locking plate, bottom plate and compression plate in proper order;Adjusting assembly cooperates with compression rod, controls compression rod activity, adjusts the pressure between compression plate, locking plate and bottom plate;Through replacement locking structure, so that user experiences different adjustment control mode with lower replacement cost, also reduce manufacturer production cost.

Description

Technical Field

[0001] This utility model relates to the field of jigsaw technology, and in particular to a jigsaw base plate adjustment and replacement structure. Background Technology

[0002] In a jigsaw, a base plate is typically included, which conforms to the surface of the object being cut to facilitate control of the cutting direction. Since the cutting surface is not necessarily perpendicular to the object's surface, the angle of the jigsaw's base plate is usually adjustable by rotation, as shown in patent application publication number CN118218673A. In existing jigsaw base plate angle adjustment structures, tightening or loosening is typically achieved by rotating a handle or tightening a threaded mechanism. The advantage of rotating the handle is its simplicity, requiring no additional tools. However, with repeated rotations or vibrations during prolonged operation, the handle's connection can loosen, affecting its tightening effect and stability. Furthermore, compared to the threaded tightening method, it has higher material costs, resulting in a higher selling price. The threaded tightening method, on the other hand, offers advantages such as low cost and high stability, but the adjustment is inconvenient, requiring external tools such as wrenches.

[0003] While existing jigsaws offer two different baseplate adjustment methods, these methods are typically implemented independently and cannot be interchanged. For users, a single jigsaw allows only one baseplate adjustment method to be used. For manufacturers, both adjustment methods require separately designed structures and molds, increasing production costs. Therefore, a jigsaw structure with multiple baseplate adjustment methods that are easily interchangeable is needed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a base plate adjustment and replacement structure for a jigsaw, as well as the jigsaw itself.

[0005] To solve the above problems, the present invention adopts the following solution:

[0006] A base plate adjustment and replacement structure for a jigsaw includes a base plate, a replaceable locking structure, a pressure plate, and a locking plate. The locking structure includes a pressure rod and an adjustment assembly. The locking plate is fixedly disposed at the bottom of the jigsaw housing, near the saw blade. The locking plate is fitted against the base plate, and the contact surface between the locking plate and the base plate is a cylindrical curved surface. The pressure plate is disposed on the side of the base plate away from the locking plate. The pressure rod passes through the locking plate, the base plate, and the pressure plate in sequence. The adjustment assembly cooperates with the pressure rod to control the movement of the pressure rod and adjust the pressure between the pressure plate, the locking plate, and the base plate.

[0007] Furthermore, the adjustment assembly includes a positioning plate; wherein a protruding connecting block is provided on the side of the locking plate away from the base plate, the connecting block being used to connect with the housing of the jigsaw; there are two connecting blocks in total, and the positioning plate is embedded between the two connecting blocks; a threaded hole is provided in the middle part of the positioning plate, the threaded hole being used to connect with the bolt serving as a clamping rod.

[0008] Furthermore, the adjusting assembly includes a rotating component; the rotating component includes a handle for convenient control of rotation, and a first groove is provided on the upper end surface of the rotating component. A first pin that mates with the first groove is provided on the clamping rod; a second pin is also provided on the clamping rod, and a second groove that mates with the second pin is provided on the locking plate. The second pin is embedded in the second groove to restrict the rotation of the clamping rod; a nut for adjusting the tightness is also provided at the end of the clamping rod near the clamping plate.

[0009] Furthermore, the rotating component also includes a rotating block; one end of the rotating handle is provided with a ring structure, the rotating block is snapped into the inner side of the ring structure, the upper end face of the rotating block is provided with a first groove, the clamping rod passes through the rotating block and cooperates with the first groove; a boss matching the shape of the inner circumference of the ring structure is provided on the side of the rotating block near the ring structure, the boss is embedded in the inner circumference of the ring and forms a snap-fit ​​relationship with the ring.

[0010] Furthermore, a toothed structure is provided between the base plate and the locking plate for mutual engagement.

[0011] Furthermore, the tooth structure includes a locking tooth and a rack; the rack is fixedly mounted on the base plate, and the length direction of the rack is along the circumferential direction of the outer side of the cylindrical curved surface on the base plate; the locking tooth is mounted on the locking plate.

[0012] Furthermore, the base plate is provided with two racks; the locking plate is provided with two corresponding locking teeth.

[0013] Furthermore, the outer side of the cylindrical curved surface on the base plate is provided with a scale for indicating the rotation angle of the base plate.

[0014] A jigsaw includes the aforementioned base plate adjustment and replacement structure, a housing, and a saw blade; wherein a locking plate in the base plate adjustment and replacement structure is fixedly mounted on the housing, and the inner side of the cylindrical curved surface of the locking plate faces the outside of the housing and fits against the outer base plate; the saw blade passes through the base plate.

[0015] The beneficial effects of this utility model are as follows:

[0016] By setting up a replaceable locking structure, manufacturers can produce jigsaws with different adjustment modes using similar molds, reducing production costs and also reducing replacement costs for consumers who want to experience multiple adjustment modes.

[0017] By setting adjustment components including handles, nuts, and other structures, the clamping rod can be controlled to move simultaneously along its axis when rotated, thereby achieving the locking or loosening effect between the base plate and the locking plate. This is easy to operate, and the nut can also control the tightness of the rotating parts.

[0018] By using bolts to work with the positioning plate, the tightness of the clamping plate, the base plate, and the locking plate can be adjusted. The structure is simple and the connection is stable.

[0019] By setting a toothed structure, a stable fit is formed between the base plate and the locking plate, preventing relative deflection after they are tightened. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the jigsaw in Example 1;

[0021] Figure 2 This is a schematic diagram of the bottom plate and locking structure inside the housing of Example 1;

[0022] Figure 3 This is a schematic diagram showing the separation of the base plate and locking structure in Example 1;

[0023] Figure 4 This is an exploded view of the locking structure in Example 1;

[0024] Figure 5 Explosion-proof diagram of the locking structure in Example 1 Figure 2 ;

[0025] Figure 6 This is a schematic diagram of the jigsaw in Example 2;

[0026] Figure 7 This is a schematic diagram of the base plate adjustment and replacement structure in Example 2;

[0027] Figure 8 This is an exploded view of the base plate adjustment and replacement structure in Example 2.

[0028] Explanation of the reference numerals in the attached diagram: Base plate 1, rack 11, scale 12, locking structure 2, clamping rod 21, positioning plate 22, snap-fit ​​groove 221, handle 23, first groove 24, first pin 25, second pin 26, nut 27, rotating block 28, boss 29, clamping plate 3, locking plate 4, connecting block 41, second groove 42, snap-fit ​​tooth 43, housing 5, elastic sheet 51, positioning wheel 52, saw blade 6. Detailed Implementation

[0029] 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.

[0030] 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 figures only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the 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. Example

[0031] like Figures 3-5As shown, a base plate adjustment and replacement structure for a jigsaw includes a base plate 1, a locking structure 2, a pressure plate 3, and a locking plate 4. The locking structure 2 includes a pressure rod 21 and an adjustment assembly. The bottom of the outer jigsaw housing 5 is fixedly provided with the locking plate 4, which is fitted against the base plate 1. The contact surface between the locking plate 4 and the base plate 1 is a cylindrical curved surface, allowing the base plate 1 to rotate along the contact surface. The pressure plate 3 is located on the side of the base plate 1 away from the locking plate 4. The pressure rod 21 passes through the locking plate 4, the base plate 1, and the pressure plate 3 in sequence. The adjustment assembly cooperates with the pressure rod 21 to control the movement of the pressure rod 21 and adjust the pressure between the pressure plate 3, the locking plate 4, and the base plate 1, so that the pressure plate 3, the locking plate 4, and the base plate 1 can clamp and abut against each other, achieving a stable connection. In this example, the adjustment assembly includes a rotating component; the rotating component includes a handle 23 for easy control of rotation, and a first groove 24 is provided on the upper end surface of the rotating component. A first pin 25 that mates with the first groove 24 is provided on the clamping rod 21; a nut 27 for adjusting tightness is also provided at the end of the clamping rod 21 near the clamping plate 3; a second pin 26 is also provided on the clamping rod 21, and a second groove 42 that mates with the second pin 26 is provided on the locking plate 4. The second pin 26 is embedded in the second groove 42, restricting the rotation of the clamping rod 21, thereby facilitating the tightening of the nut 27, and also preventing the clamping rod 21 from rotating with the handle 23. When the handle 23 is rotated, the first pin 25 disengages from the first groove 24 due to the positional relationship between the first groove 24 and the first pin 25. This controls the clamping rod 21 to pull towards one side of the locking plate 4. Combined with the nut 27 on the locking rod, the clamping plate 3 is pressed against the locking plate 4, thus pressing the base plate 1 tightly onto the locking plate 4, forming a stable connection between the base plate 1 and the locking plate 4. Conversely, when the clamping rod 21 is released, the base plate 1 and the locking plate 4 can separate, allowing the locking plate 4 to rotate along the connected curved surface. The nut 27 can be adjusted when the handle 23 is loose. For example, when the first pin 25 is embedded in the first groove 24, rotating the nut 27 tightens the clamping rod 21, thus controlling the handle 23 to achieve a relatively stable tightening and loosening effect. It should be noted that in some other embodiments, the base plate 1 can be integrally formed with the housing 5.

[0032] The rotating component also includes a rotating block 28; one end of the rotating handle is provided with a ring structure, the rotating block 28 is snapped into the inner side of the ring structure, the upper end face of the rotating block 28 is provided with a first groove 24, the clamping rod 21 passes through the rotating block 28 and cooperates with the first groove 24; a boss 29 matching the inner circumference shape of the ring structure is provided on the side of the rotating block 28 near the ring structure. In this example, the inner circumference shape of the ring structure is a circle with a chordal section, so the shape of the boss 29 is a cylinder with a corresponding chordal section; the boss 29 is embedded in the inner circumference of the ring and forms a snap-fit ​​relationship with the ring.

[0033] A toothed structure is also provided between the base plate 1 and the locking plate 4 for mutual engagement. In this example, the toothed structure includes locking teeth 43 and racks 11. The rack 11 is fixedly mounted on the base plate 1, and the length direction of the rack 11 is along the circumferential direction of the outer side of the cylindrical curved surface on the base plate 1. The locking teeth 43 are mounted on the locking plate 4. When the base plate 1 and the locking plate 4 are in contact, the locking teeth 43 between them limit each other, preventing the fixed base plate 1 from rotating. The base plate 1 is provided with two racks 11, and the locking plate 4 is provided with two corresponding locking teeth 43. After the front and rear sets of toothed structures form a limit, they can effectively prevent the fixed locking plate 4 from undergoing slight deflection.

[0034] The cylindrical curved surface on the base plate 1 is also provided with a scale 12 for indicating the rotation angle of the base plate 1 on the outer side facing the locking plate 4. The scale 12 includes 0°~45° angle scale lines, with a scale line 12 at 5° intervals and a number mark at 15° intervals.

[0035] The locking plate is also provided with a reinforcing rib structure, wherein the reinforcing rib is located on the side of the curved locking plate away from the bottom plate 1, and the extension direction of the reinforcing rib is perpendicular to the axis of the curved surface. In this way, when the bottom plate 1 is pressed against the locking plate by the pressure of the contact surface, the locking plate can withstand stronger pressure without deformation.

[0036] like Figure 1 and Figure 2 As shown, a jigsaw includes the aforementioned base plate adjustment and replacement structure, a housing 5, and a saw blade 6. The locking plate 4 in the base plate adjustment and replacement structure is fixedly mounted on the housing 5. The inner side of the cylindrical curved surface of the locking plate 4 faces the outside of the housing 5 and fits against the outer base plate 1. The saw blade 6 passes through the base plate 1. Because the base plate 1 abuts against the cutting surface, the saw blade 6 is close to the base plate 1, facilitating stable control of the saw blade 6. The housing 5 of the jigsaw also includes a positioning element that abuts against the saw blade 6. The positioning element includes an elastic plate 51 and a positioning wheel 52. One end of the elastic plate 51 is fixedly mounted inside the housing 5, and the other end of the elastic plate 51 is provided with the positioning wheel 52. The positioning wheel 52 abuts against the saw blade 6 and has a groove for embedding the saw blade 6, making it less likely for the saw blade 6 to deflect left or right during reciprocating motion, thus preventing breakage.

[0037] During implementation, the adjustment component, in conjunction with the clamping rod 21, achieves a secure connection between the base plate 1 and the locking plate 4. The adjustment component, including the handle 23 and the nut 27, allows the clamping rod 21 to move simultaneously along its axis when rotated, thus locking or releasing the base plate 1 and the locking plate 4. The nut 27 also controls the tightness of the rotating parts. The toothed structure ensures a stable fit between the base plate 1 and the locking plate 4, preventing relative deflection after tightening. Example

[0038] like Figures 6-8 As shown, the difference between this embodiment and Embodiment 1 is that the adjustment component includes a positioning plate 22; wherein a protruding connecting block 41 is provided on the side of the locking plate 4 away from the base plate 1, and the connecting block 41 is provided with a threaded hole for connecting and fixing with the housing 5 of the jigsaw; in this example, two connecting blocks 41 are provided on the locking plate 4; the positioning plate 22 is embedded between the two connecting blocks 41; wherein the positioning plate 22 is generally square plate-shaped and has a certain thickness, and both ends of the positioning plate 22 are respectively provided with snap-fit ​​grooves 221 corresponding to the connecting blocks 41, and the connecting blocks 41 are embedded in the snap-fit ​​grooves 221 to fix the angle of the positioning plate 22 relative to the locking plate 4; a threaded hole is provided in the middle part of the positioning plate 22, which is used for threaded connection with the bolt that serves as the clamping rod 21. When in use, only the tightness of the bolts needs to be adjusted to adjust and fix the angle of the base plate 1. Compared with embodiment 1, the structure of the clamping plate 3, locking plate 4 and base plate 1 is the same. Only the locking structure 2 needs to be replaced to change the adjustment method. This allows manufacturers to produce jigsaws with two adjustment methods using similar molds, reducing production costs and also reducing the replacement cost for consumers who want to experience multiple adjustment methods.

[0039] The above description is merely a specific example of this utility model and does not constitute any limitation on this utility model. Obviously, those skilled in the art, after understanding the content and principle of this utility model, may make various modifications and changes in form and details without departing from the principle and structure of this utility model. However, these modifications and changes based on the concept of this utility model are still within the protection scope of the claims of this utility model.

Claims

1. A base plate adjustment and replacement structure for a jigsaw, comprising a base plate (1), characterized in that, It also includes a replacement locking structure (2), a pressure plate (3), and a locking plate (4). The locking structure (2) includes a pressure rod (21) and an adjustment component. The locking plate (4) is fixedly installed at the bottom of the housing (5) of the jigsaw, near the saw blade (6) in the jigsaw. The locking plate (4) is fitted with the base plate (1), and the contact surface between the locking plate (4) and the base plate (1) is a cylindrical curved surface. The pressure plate (3) is located on the side of the base plate (1) away from the locking plate (4). The pressure rod (21) passes through the locking plate (4), the base plate (1), and the pressure plate (3) in sequence. The adjustment component works with the pressure rod (21) to control the movement of the pressure rod (21) and adjust the pressure between the pressure plate (3), the locking plate (4), and the base plate (1).

2. The base plate adjustment and replacement structure for a jigsaw according to claim 1, characterized in that, The adjustment assembly includes a positioning plate (22); wherein a protruding connecting block (41) is provided on the side of the locking plate (4) away from the base plate (1), the connecting block (41) is used to connect with the housing (5) of the jigsaw; there are two connecting blocks (41), and the positioning plate (22) is embedded between the two connecting blocks (41); a threaded hole is provided in the middle part of the positioning plate (22), which is used to connect with the bolt as a clamping rod (21).

3. The base plate adjustment and replacement structure for a jigsaw according to claim 1, characterized in that, The adjustment assembly includes a rotating component; the rotating component includes a handle (23) for easy control of rotation, and a first groove (24) is provided on the upper end surface of the rotating component. A first pin (25) that cooperates with the first groove (24) is provided on the clamping rod (21); a second pin (26) is also provided on the clamping rod (21), and a second groove (42) that cooperates with the second pin (26) is provided on the locking plate (4). The second pin (26) is embedded in the second groove (42) to restrict the rotation of the clamping rod (21); a nut (27) for adjusting the tightness is also provided at the end of the clamping rod (21) near the clamping plate (3).

4. The base plate adjustment and replacement structure for a jigsaw according to claim 3, characterized in that, The rotating component also includes a rotating block (28); one end of the rotating handle is provided with a ring structure, the rotating block (28) is snapped into the inner side of the ring structure, the upper end face of the rotating block (28) is provided with a first groove (24), the clamping rod (21) passes through the rotating block (28) and cooperates with the first groove (24); a boss (29) matching the shape of the inner circumference of the ring structure is provided on the side of the rotating block (28) near the ring structure, the boss (29) is embedded in the inner circumference of the ring and forms a snap-fit ​​relationship with the ring.

5. A base plate adjustment and replacement structure for a jigsaw according to any one of claims 1 to 4, characterized in that, A toothed structure that interlocks with each other is also provided between the base plate (1) and the locking plate (4).

6. The base plate adjustment and replacement structure for a jigsaw according to claim 5, characterized in that, The tooth structure includes a locking tooth (43) and a rack (11); the rack (11) is fixedly mounted on the base plate (1), and the length direction of the rack (11) is along the circumferential direction of the outer side of the cylindrical curved surface on the base plate (1); the locking tooth (43) is mounted on the locking plate (4).

7. The base plate adjustment and replacement structure for a jigsaw according to claim 6, characterized in that, The base plate (1) is provided with two racks (11); the locking plate (4) is provided with two corresponding locking teeth (43).

8. The base plate adjustment and replacement structure for a jigsaw according to claim 1, characterized in that, The outer side of the cylindrical curved surface on the base plate (1) is also provided with a scale (12) for indicating the rotation angle of the base plate (1).

9. A jigsaw, characterized in that, The base plate adjustment and replacement structure according to any one of claims 1 to 8 further includes a housing (5) and a saw blade (6); wherein the locking plate (4) in the base plate adjustment and replacement structure is fixedly disposed on the housing (5), and the inner side of the cylindrical curved surface in the locking plate (4) faces the outside of the housing (5) and is in contact with the outer base plate (1); the saw blade (6) passes through the base plate (1).

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