Jig saw

Abstract

The utility model discloses a jig saw which comprises a shell and a reciprocating motion mechanism. The shell is provided with a mounting cavity. The reciprocating motion mechanism is arranged in the installation cavity and comprises a crank and a reciprocating shaft which are connected, the crank is connected to the output end of the motor, and the jig saw further comprises an installation base and a locking structure. The mounting seat is arranged at one end of the reciprocating shaft, and a clamping cavity is formed in the mounting seat and used for containing the saw blade. The locking structure is rotatably connected to the mounting seat, and the locking structure is provided with a first abutting surface. Wherein the jig saw has a clamping state and a loosening state, and when the loosening state is converted into the clamping state, the locking structure rotates in the first direction so as to drive the first abutting face to make the saw blade abut against the interior of the clamping cavity. When the clamping state is converted into the loosening state, the locking structure rotates in the direction opposite to the first direction so as to drive the first abutting face to be separated from the saw blade. According to the technical scheme, the jig saw has the advantages that the clamping mechanism of the jig saw is simple and convenient to mount and dismount.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric tool field, especially a kind of curved saw. BACKGROUND

[0002] Curved saw is a kind of power tool with saw blade reciprocating motion to saw various materials, which can effectively curve cutting metal and wood. Cutting metal and wood will need to use different saw blade, and saw blade will also be worn during cutting process, so curved saw needs a structure to install and remove saw blade.

[0003] The existing installation structure of curved saw contains multiple movable balls to fix the notch of saw blade, so the installation structure needs to switch the activity state of ball, and also needs to limit the stroke of ball, so the installation structure needs many small parts to cooperate together. Many small parts are quite troublesome in the process of assembly, and it is not easy to disassemble if there is an error in the process. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of curved saw, to solve the problem of complex installation structure of curved saw.

[0005] To achieve the above purpose, the utility model provides a kind of curved saw, comprising:

[0006] Shell, is equipped with installation cavity;

[0007] Reciprocating mechanism, is located in the installation cavity, the reciprocating mechanism includes the crank and reciprocating shaft connected, the crank is connected to the output end of motor, the curved saw further includes:

[0008] Mounting seat, is located in one end of reciprocating shaft, the mounting seat is equipped with clamping cavity, the clamping cavity is used to accommodate saw blade;And

[0009] Locking structure, rotatably connected to the mounting seat, the locking structure is equipped with first abutment surface;

[0010] Among them, the curved saw has clamping state and loosening state, when loosening state turns into clamping state, the locking structure rotates towards first direction to drive the first abutment surface to abut the saw blade in the clamping cavity;

[0011] When clamping state turns into loosening state, the locking structure rotates towards the opposite direction of first direction to drive the first abutment surface to separate from the saw blade.

[0012] Optionally, the locking structure includes:

[0013] First locking piece, the first locking piece rotatably connected to the mounting seat, the first locking piece is equipped with the first abutment surface;

[0014] A second locking member movably connected to the first locking member and located in the clamping cavity;

[0015] When the loosening state is converted to the clamping state, the first locking member rotates in the first direction to drive the first abutting surface to abut the saw blade in the clamping cavity, and the first locking member drives the second locking member to move in the second direction to abut the saw blade in the clamping cavity.

[0016] When the clamping state is converted to the loosening state, the first locking member rotates in the opposite direction of the first direction to drive the first abutting surface to be separated from the saw blade, and the first locking member drives the second locking member to move in the opposite direction of the second direction to be separated from the saw blade.

[0017] Optionally, the first locking member comprises:

[0018] A rotating seat sleeved on the mounting seat and rotatably connected with the mounting seat, the rotating seat being provided with a rotating channel;

[0019] A boss provided in the rotating channel, the first abutting surface being provided on the boss, the boss being further provided with a second abutting surface, the second locking member being movably connected to the second abutting surface and located in the rotating channel;

[0020] When the loosening state is converted to the clamping state, the rotating seat rotates to drive the boss to move in the first direction in the clamping cavity, so that the first abutting surface abuts the saw blade in the clamping cavity, and the second abutting surface moves the second locking member in the second direction to abut the saw blade.

[0021] When the clamping state is converted to the loosening state, the rotating seat rotates to drive the boss to move in the opposite direction of the first direction in the clamping cavity, so that the first abutting surface is separated from the saw blade, and the second abutting surface moves the second locking member in the opposite direction of the second direction to be separated from the saw blade.

[0022] Optionally, the mounting seat comprises:

[0023] A base connected to the reciprocating shaft; and

[0024] Two clamping walls spaced apart on the base, the clamping cavity being formed between the two clamping walls, one of the clamping walls being provided with a bearing surface, and the other of the clamping walls being provided with a through hole, the second locking member being movably connected in the through hole, one end of the second locking member extending into the clamping cavity, and the other end abutting against the second abutting surface.

[0025] Optionally, the second locking member is a cylindrical pin or a ball, and the second locking member is slidingly connected to the through hole.

[0026] Optionally, the jigsaw further comprises a first elastic member, one end of the first elastic member is connected to the mounting base, and the other end of the first elastic member is connected to the locking structure, and the first elastic member drives the locking structure to move in the first direction under the action of an elastic force.

[0027] Optionally, the first locking member is further provided with a handle.

[0028] Optionally, an edge of the saw blade is provided with a lug, and the boss is provided with a third abutting surface.

[0029] When the loosened state is changed to the clamped state, the locking structure rotates in the first direction to drive the third abutting surface to abut the lug in the clamping cavity.

[0030] When the clamped state is changed to the loosened state, the locking structure rotates in the opposite direction of the first direction to drive the third abutting surface to be separated from the lug.

[0031] Optionally, the jigsaw further comprises a second elastic member, one end of the second elastic member is connected to the mounting base, and the other end of the second elastic member extends into the clamping cavity, and the second elastic member is used to abut the lug against the third abutting surface.

[0032] Optionally, the jigsaw further comprises a clamping spring, the clamping spring is sleeved on the clamping wall, and the clamping spring and the base clamp the rotating seat.

[0033] The utility model discloses a curve saw with high integrated degree's saw blade clamping mechanism. The curve saw includes a shell, a reciprocating mechanism and a saw blade. The shell is provided with a mounting cavity. The reciprocating mechanism is installed in the mounting cavity. A crank of the reciprocating mechanism is connected to a motor. The saw blade is connected to a reciprocating shaft of the reciprocating mechanism. The reciprocating mechanism can convert the rotating motion of the motor into linear reciprocating motion, thereby driving the saw blade to reciprocate. The curve saw further includes a locking structure having a first abutting surface. The first abutting surface can enter or exit the clamping cavity by rotating. When a user installs the saw blade, the curve saw is in a loosened state, i.e., the first abutting surface does not extend into the clamping cavity. Then, the user first places the saw blade into the clamping cavity, and then rotates the locking structure along a first direction, so that the first abutting surface of the locking structure enters the clamping cavity by rotating and abuts against the edge of the saw blade, thereby fixing the saw blade in the clamping cavity. When the user wants to remove the saw blade, the curve saw is in a clamped state, i.e., the first abutting surface extends into the clamping cavity and abuts against the edge of the saw blade. The user rotates the locking structure along the first direction in the opposite direction, so that the first abutting surface is separated from the saw blade, thereby loosening the saw blade in the clamping cavity. Then, the user can take out the saw blade. By the present scheme, the number of movable parts is reduced, and the movable parts are integrated into the locking structure. The clamping state is switched by rotating. Such arrangement makes the entire clamping mechanism have high integration degree and facilitates the assembly of the clamping mechanism. Moreover, only one action is needed to install or remove the saw blade, which is convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and other drawings can also be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0035] Figure 1 It is a structure diagram of the mounting seat of the curve saw of the present utility model.

[0036] Figure 2 It is a structure diagram of the first locking piece of the curve saw of the present utility model.

[0037] Figure 3 It is a front view of the curve saw of the present utility model.

[0038] Figure 4 It is Figure 3 the cross-sectional view of A-A.

[0039] Figure 5 It is Figure 3 the cross-sectional view of B-B of the curve saw in the loosened state.

[0040] Figure 6 It isFigure 3 a cross-sectional view of a curved saw clamping state of B-B of figure 1;

[0041] Figure 7 a schematic view of the lug of the saw blade of the utility model.

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] 1, mounting seat; 11, base; 12, clamping wall; 121, clamping cavity; 122, through hole; 123, waist hole; 13, first elastic piece; 14, second elastic piece; 2, locking structure; 21, first locking piece; 211, rotating seat; 212, rotating channel; 213, boss; 214, first abutting surface; 215, second abutting surface; 216, third abutting surface; 217, handle; 22, second locking piece; 3, lug.

[0044] The utility model discloses the realization, functional characteristics and advantages will be further described with reference to the drawings in conjunction with the embodiment. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0046] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0047] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0048] In combination Figure 1 , Figure 2 and Figure 4The utility model provides a kind of curved saw, including shell and reciprocating mechanism. Shell is equipped with mounting cavity. Reciprocating mechanism is located in the mounting cavity, and the reciprocating mechanism includes the crank and reciprocating shaft connected, the crank is connected to the output end of motor, and the curved saw further includes mounting seat 1 and locking structure 2. Mounting seat 1 is equipped in one end of the reciprocating shaft, and the mounting seat 1 is equipped with clamping cavity 121, and the clamping cavity 121 is used to accommodate saw blade. Locking structure 2 can be rotatably connected to the mounting seat 1, and the locking structure 2 is equipped with first abutting face 214. Among them, the curved saw has clamping state and loosening state, when loosening state turns into clamping state, the locking structure 2 rotates to the first direction to drive the first abutting face 214 to abut the saw blade in the clamping cavity 121. When clamping state turns into loosening state, the locking structure 2 rotates to the opposite direction of the first direction to drive the first abutting face 214 to separate from the saw blade.

[0049] Specifically, the shell of the curved saw has an installation port communicating with the mounting cavity, the motor is installed in the mounting cavity, and the reciprocating mechanism is arranged in the mounting cavity. The reciprocating mechanism includes a crank and a reciprocating shaft, wherein the crank is a cylindrical structure, and the crank is connected to the output end of the motor. Further, the output end of the motor is provided with a gear set, and the crank is connected to the end face of the gear. The motor drives the crank to make a circular motion. The reciprocating shaft is a rod structure and is slidably connected in the mounting cavity. The length direction of the reciprocating shaft is perpendicular to the length direction of the output shaft of the motor. A waist-shaped hole 123 is arranged in the reciprocating shaft. The width of the waist-shaped hole 123 is adapted to the diameter of the crank. The length of the waist-shaped hole 123 is greater than the diameter of the crank in circular motion. The length direction of the waist-shaped hole 123, the length direction of the reciprocating shaft, and the length direction of the output shaft of the motor are perpendicular to each other in pairs. The waist-shaped hole 123 of the reciprocating shaft is sleeved on the crank, and one end of the reciprocating shaft is connected to the saw blade. When the motor rotates, the crank makes a circular motion, and the reciprocating shaft moves while the crank slides in the waist-shaped hole 123, thereby driving the saw blade to make a reciprocating motion. The mounting seat 1 is a cylindrical structure, and a mounting cavity is arranged in the middle of one end of the mounting seat 1. The mounting cavity is a gap formed between two planes. The mounting cavity can accommodate a flat saw blade and serve as a platform for carrying the saw blade. The mounting seat 1 is further connected to a locking structure 2. The locking structure 2 is a tubular structure, and a first abutting face 214 is arranged in the tube. The tubular locking structure 2 is sleeved on the cylindrical mounting seat 1 and can rotate. The first abutting face 214 protrudes from the wall of the locking structure 2. It can be understood that the flat structure of the saw blade has two planes and two edges. After the saw blade is carried in the clamping cavity 121, the clamping cavity 121 limits the planes of the saw blade. By rotating the locking structure 2, the first abutting face 214 of the locking structure 2 abuts against the edge of the saw blade, thereby fixing the saw blade in the clamping cavity 121.

[0050] Further, the mounting seat 1 is detachably connected to one end of the reciprocating shaft, or the mounting seat 1 and the reciprocating shaft are integrally machined and formed.

[0051] Further, the first abutting surface 214 is formed on the pipe wall of the locking structure 2 and smoothly transitions with the pipe wall, so that when the first abutting surface 214 enters the clamping cavity 121, the space of the clamping cavity 121 is reduced, and the amount of reduction is linearly related to the distance of rotation. Such arrangement makes the clamping cavity 121 capable of clamping saw blades of different sizes, and different sizes of saw blades have different widths, that is, the widths between the two edges are inconsistent, and then only the rotation angle of the locking structure 2 needs to be adjusted to adapt to saw blades of different widths.

[0052] Further, taking the center line of the saw blade as an axis, the first direction is the direction of rotation around the axis.

[0053] Through the embodiment, the jigsaw comprises a housing, a reciprocating mechanism, and a saw blade. The housing is provided with a mounting cavity, the reciprocating mechanism is installed in the mounting cavity, the crank of the reciprocating mechanism is connected to the motor, and the saw blade is connected to the reciprocating shaft of the reciprocating mechanism. The reciprocating mechanism can convert the rotary motion of the motor into linear reciprocating motion, thereby driving the saw blade to reciprocate. The jigsaw further comprises a locking structure 2 having a first abutting surface 214, which can enter or exit the clamping cavity 121 by rotating. When the user installs the saw blade, the jigsaw is in a loosened state, that is, the first abutting surface 214 does not extend into the clamping cavity 121. Then the user first places the saw blade into the clamping cavity 121, and then rotates the locking structure 2 along the first direction, so that the first abutting surface 214 of the locking structure 2 enters the clamping cavity 121 along with the rotation and abuts against the edge of the saw blade, thereby fixing the saw blade in the clamping cavity 121. When the user wants to remove the saw blade, the jigsaw is in a clamped state, that is, the first abutting surface 214 extends into the clamping cavity 121 and abuts against the edge of the saw blade. The user rotates the locking structure 2 along the reverse direction of the first direction, so that the first abutting surface 214 is separated from the saw blade, thereby loosening the saw blade in the clamping cavity 121, and then the user can take out the saw blade. Through the scheme, the number of moving parts is reduced, and the locking structure 2 is integrated. The clamping state is switched by rotating, so that the whole clamping mechanism has high integration, and the clamping mechanism is easy to assemble. And only one action is needed to install or remove the saw blade, which is convenient and fast.

[0054] In combination Figure 1 , Figure 2 and Figure 3The utility model provides a locking structure 2 includes first locking piece 21 and second locking piece 22. The first locking piece 21 rotatable connection in the mounting seat 1, first locking piece 21 is equipped with the first abutment surface 214. Second locking piece 22 is movably connected in first locking piece 21, and is located in the clamping cavity 121. Among them, when the loosening state turns into the clamping state, first locking piece 21 rotates to drive the first abutment surface 214 and abuts in the clamping cavity 121 with the saw blade to the first direction, and first locking piece 21 drives second locking piece 22 and abuts in the clamping cavity 121 with the saw blade to the second direction. When the clamping state turns into the loosening state, first locking piece 21 rotates to drive the first abutment surface 214 and separates from the saw blade to the opposite direction of the first direction, and first locking piece 21 drives second locking piece 22 and separates from the saw blade to the opposite direction of the second direction.

[0055] Specifically, first locking piece 21 is tubular structure, and the first abutment surface 214 is arranged in the tube. The tubular first locking piece 21 is sleeved on the cylindrical mounting seat 1, and can rotate. Second locking piece 22 is rod structure, and second locking piece 22 is movably connected in the tube of first locking piece 21. First locking piece 21 rotates and drives second locking piece 22 to move along the second direction. The second direction is the vertical direction of the saw blade plane.

[0056] Further, second locking piece 22 and first locking piece 21 can be connected through a rocker, so that the turning motion of first locking piece 21 is converted into the linear motion of second locking piece 22. First locking piece 21 can also drive second locking piece 22 to move as a cam.

[0057] Through the embodiment, as shown in Figure 5 and Figure 6 When the user installs the saw blade, the jigsaw is in the loosening state, that is, the first abutment surface 214 does not extend into the clamping cavity 121, and the second abutment surface 215 does not drive the second locking piece 22 to enter the clamping cavity 121. Then the user first puts the saw blade into the clamping cavity 121, and then rotates the first locking piece 21 along the first direction, so that the second locking piece 22 enters the clamping cavity 121 along with the rotation and abuts against one side of the saw blade, the boss 213 enters the clamping cavity 121 along with the rotation and abuts against the edge of the saw blade, and the saw blade is fixed in the clamping cavity 121. When the user wants to remove the saw blade, the jigsaw is in the clamping state, that is, the second locking piece 22 extends into the clamping cavity 121 and abuts against one side of the saw blade, and the boss 213 extends into the clamping cavity 121 and abuts against the edge of the saw blade, the user rotates the first locking piece 21 along the opposite direction of the first direction, so that the second locking piece 22 and the boss 213 are separated from the saw blade, and then the saw blade is loosened in the clamping cavity 121, and then the user can take out the saw blade.

[0058] In combination Figure 1 , Figure 2 and Figure 3 , the utility model provides an embodiment, first locking piece 21 includes rotating seat 211 and boss 213. Rotating seat 211 is sleeved in mounting seat 1, and is rotatably connected in mounting seat 1, and rotating seat 211 is equipped with rotating passage 212. Boss 213 is located in rotating passage 212, first abutment surface 214 is located in boss 213, and second locking piece 22 is movably connected in second abutment surface 215 and is located in rotating passage 212. Among them, when loosening state turns into clamping state, rotating seat 211 rotates and drives boss 213 to move in first direction in clamping cavity 121, so that first abutment surface 214 abuts saw blade in clamping cavity 121, and second abutment surface 215 moves second locking piece 22 in second direction to abut saw blade. When clamping state turns into loosening state, rotating seat 211 rotates and drives boss 213 to move in the opposite direction of first direction in clamping cavity 121, so that first abutment surface 214 is separated from saw blade, and second abutment surface 215 moves second locking piece 22 in the opposite direction of second direction to be separated from saw blade.

[0059] Specifically, rotating seat 211 is tubular structure, and rotating passage 212 is in the tube. When rotating seat 211 is sleeved in mounting seat 1, clamping cavity 121 is located in rotating passage 212. Two bosses 213 of the pipe wall of rotating seat 211 are located at the symmetrical positions of the pipe wall, and each boss 213 has first abutment surface 214. When rotating seat 211 rotates, two first abutment surfaces 214 of two bosses 213 move on both sides of clamping cavity 121, and clamping cavity 121 is contracted or expanded to enable saw blade to be fixed or loosened. One end of second locking piece 22 extends into clamping cavity 121, and the other end abuts on second abutment surface 215. Second abutment surface 215 is formed in the position of non-boss 213 of the inner wall of rotating seat 211, and second abutment surface 215 and first abutment surface 214 of boss 213 are smoothly connected.

[0060] Further, when rotating rotating seat 211, second abutment surface 215 first drives second locking piece 22 to abut one side of saw blade in clamping cavity 121, and then first abutment surface 214 enters clamping cavity 121 and abuts two sides of saw blade.

[0061] Through the embodiment, such as Figure 5 and Figure 6As shown, when the user installs the saw blade, the jigsaw is in a loose state, i.e. the first abutting surface 214 does not extend into the clamping cavity 121. Then the user first places the saw blade into the clamping cavity 121, and then rotates the rotating seat 211 along the first direction, so that the boss 213 enters the clamping cavity 121 along with the rotation and abuts against the edge of the saw blade, the second abutting surface 215 moves the second locking piece 22 toward the second direction to abut against the saw blade, thereby fixing the saw blade in the clamping cavity 121. When the user wants to remove the saw blade, the jigsaw is in a clamped state, i.e. the boss 213 extends into the clamping cavity 121 and abuts against the edge of the saw blade, the user reversely rotates the rotating seat 211 along the first direction, so that the second locking piece 22 and the boss 213 are separated from the saw blade, the boss 213 is separated from the saw blade, and then the saw blade is loosened in the clamping cavity 121, and then the user can take out the saw blade.

[0062] In combination Figure 1 , Figure 2 and Figure 3 , the utility model provides an embodiment, the mounting seat 1 includes the base 11 and the clamping wall 12. The base 11 is connected to the reciprocating shaft. Two clamping walls 12 are spaced apart on the base 11, and the clamping cavity 121 is formed between the two clamping walls 12. One clamping wall 12 is provided with a bearing surface, and the other clamping wall 12 is provided with a through hole 122, the second locking piece 22 is movably connected in the through hole 122, the boss 213 is further provided with a second abutting surface 215, and the second locking piece 22 abuts against the second abutting surface 215.

[0063] Specifically, the base 11 reciprocates under the driving of the reciprocating mechanism. The clamping wall 12 is a semi-cylindrical structure, and the two clamping walls 12 are connected to the base 11 and oppositely arranged, and the clamping cavity 121 is between the planar portions of the two clamping walls 12. The planar portion is the surface for bearing the saw blade, and the arc portion is the surface rotatably connected with the rotating seat 211. The through hole 122 penetrates the planar surface and the arc surface of the clamping wall 12, so that one end of the second locking piece 22 can pass through the arc surface of the clamping wall 12 and abut against the second abutting surface 215. The clamping wall 12 is further provided with a notch, so that when the rotating seat 211 is sleeved on the clamping wall 12, the notch serves as a clearance space to enable the boss 213 to enter the clamping cavity 121, or expressed as the notch serves as a clearance space to enable the clamping wall 12 to enter the rotating channel 212.

[0064] Further, the second locking piece 22 on one of the clamping walls 12 moves along the second direction, and the second direction is perpendicular to the planar surface of the clamping wall 12, and is usually the radial direction of the rotating channel 212.

[0065] Through the embodiment, as Figure 5 and Figure 6The second locking piece 22 is a cylindrical pin or a ball, the second locking piece 22 is slidably connected to the through hole 122, one end of the second locking piece 22 extends into the clamping cavity 121, and the other end abuts against the second abutting surface 215. The second locking piece 22 is a cylindrical pin or a ball, the second locking piece 22 is slidably connected to the through hole 122, one end of the second locking piece 22 extends into the clamping cavity 121, and the other end abuts against the second abutting surface 215.

[0066] In combination Figure 1 , the utility model provides an embodiment, the second locking piece 22 is cylindrical pin or ball, the second locking piece 22 is slidably connected in the through -hole 122, the second locking piece 22 one end extends to the clamping cavity 121, and the other end abuts the second abutting surface 215.

[0067] Specifically, the length of the cylindrical pin is greater than the length of the through hole 122, and the end of the cylindrical pin abutting against the second abutting surface 215 is processed into a round head, so that the second abutting surface 215 drives the cylindrical pin more smoothly. The second locking piece 22 is composed of a plurality of balls with diameters consistent with the diameter of the through hole 122.

[0068] Through the embodiment, when rotating, the second abutting surface 215 drives the cylindrical pin or the ball to extend into the clamping cavity 121 and abut against one side of the saw blade in the clamping cavity 121.

[0069] In combination Figure 1 , Figure 2 and Figure 4 , the utility model provides an embodiment, optionally, the curved saw further includes a first elastic element 13, one end of the first elastic element 13 is connected to the mounting seat 1, the other end of the first elastic element 13 is connected to the first locking piece 21, and the first elastic element 13 can drive the first locking piece 21 to move towards the first direction under the action of elastic force.

[0070] Specifically, the first elastic member 13 is a torsion spring, one end of which is connected to the first locking member 21, and the other end of which is connected to the mounting base 1. The elastic force of the torsion spring drives the first locking member 21 to rotate in the first direction, that is, to drive the jigsaw to keep the clamped state.

[0071] Through the embodiment, the first elastic member 13 makes the jigsaw keep the clamped state without interference, avoiding the saw blade of the jigsaw from being separated in the working process.

[0072] In combination with Figure 2 , the utility model provides an embodiment, first locking member 21 still be equipped with handle 217.

[0073] Specifically, the outer circumferential surface of the rotating seat 211 is provided with the handle 217, and the handle 217 facilitates the user to exert force when rotating the rotating seat 211.

[0074] Through the embodiment, the handle 217 facilitates the user to rotate the rotating seat 211, and the position of the handle 217 also facilitates the user to judge the position of the rotating seat 211 at this time.

[0075] In combination with Figure 4 and Figure 7 , the utility model provides an embodiment, the edge of the saw blade is provided with the lug 3, and the boss 213 is provided with the third abutting face 216. When the clamped state is converted into the unclamped state, the first locking member 21 rotates towards the first direction to drive the third abutting face 216 to abut the lug 3 in the clamping cavity 121. When the clamped state is converted into the unclamped state, the first locking member 21 rotates towards the opposite direction of the first direction to drive the third abutting face 216 to be separated from the lug 3.

[0076] Specifically, the two side edges of the saw blade are also provided with protruding parts, and the side of the boss 213 facing the base 11 is the third abutting face 216. The boss 213 and the bottom plate also have a certain space, in the unclamped state, the clamping cavity 121 is opened, and the saw blade and the lug 3 of the saw blade can enter the clamping cavity 121, and in the clamped state, since the boss 213 enters the clamping cavity 121 and abuts the edge of the saw blade, the space of the clamping cavity 121 is reduced, so that the lug 3 is limited between the boss 213 and the base 11.

[0077] Through the embodiment, the first abutting face 214 limits the two edges of the saw blade, the second locking member 22 and the clamping wall 12 limit the two faces of the saw blade, and then the third abutting face 216 limits the position in the length direction of the saw blade. In this way, the saw blade is completely fixed in the clamping cavity 121.

[0078] In combination with Figure 1 and Figure 4The utility model provides an embodiment, the curved saw still includes second elastic part 14, one end of second elastic part 14 is connected in mounting seat 1, the other end of second elastic part 14 extends into the clamping cavity 121, for with Lugs 3 abut in third abutment surface 216.

[0079] Specifically, the base 11 is provided with a spring, the spring is arranged along the length direction of the saw blade, one end is connected to the base 11, and the other end extends into the clamping cavity 121 and abuts against the saw blade.

[0080] Through the embodiment, when the curved saw is in the clamping state, the spring can abut the lug 3 against the third abutment surface 216. When the curved saw is in the release state, the spring can pop the saw blade out of the clamping cavity 121, facilitating the user to replace the saw blade.

[0081] In combination Figure 1 The utility model provides an embodiment, the curved saw still includes the snap spring, the snap spring is sleeved in the clamping wall 12, the snap spring and the base 11 are clamped the rotating seat 211.

[0082] Specifically, the rotating seat 211 and the clamping wall 12 are both provided with mounting grooves, which can install the snap spring and limit the positions of the rotating seat 211 and the mounting seat 1.

[0083] Through the embodiment, the rotating seat 211 will not be separated from the mounting seat 1.

[0084] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and the equivalent structural transformation of the contents of the utility model specification and the drawings is made under the utility model concept of the utility model, or is directly / indirectly applied in other related technical fields and is included in the patent protection range of the utility model.

Claims

1. A jigsaw comprising: a housing provided with a mounting cavity; a reciprocating mechanism provided in the mounting cavity, the reciprocating mechanism comprising a connecting crank and a reciprocating shaft, the crank being connected to an output end of a motor, characterized in that the jigsaw further comprises: a mounting seat provided at one end of the reciprocating shaft, the mounting seat being provided with a clamping cavity for accommodating a saw blade; and a locking structure rotatably connected to the mounting seat, the locking structure being provided with a first abutting surface; wherein the jigsaw has a clamping state and a loosening state, when the loosening state is converted into the clamping state, the locking structure is rotated in a first direction to drive the first abutting surface to abut the saw blade in the clamping cavity; when the clamping state is converted into the loosening state, the locking structure is rotated in the opposite direction of the first direction to drive the first abutting surface to disengage the saw blade.

2. A jigsaw according to claim 1, characterized in that The locking structure comprises: a first locking member rotatably connected to the mounting seat, the first locking member being provided with the first abutting surface; a second locking member movably connected to the first locking member and located in the clamping cavity; wherein when the loosening state is converted into the clamping state, the first locking member is rotated in the first direction to drive the first abutting surface to abut the saw blade in the clamping cavity, and at the same time, the first locking member drives the second locking member to move in a second direction to abut the saw blade in the clamping cavity; when the clamping state is converted into the loosening state, the first locking member is rotated in the opposite direction of the first direction to drive the first abutting surface to disengage the saw blade, and at the same time, the first locking member drives the second locking member to move in the opposite direction of the second direction to disengage the saw blade.

3. A jigsaw according to claim 2, characterized in that The first locking member comprises: a rotating seat sleeved on the mounting seat and rotatably connected to the mounting seat, the rotating seat being provided with a rotating channel; a boss provided in the rotating channel, the first abutting surface being provided on the boss, the boss being further provided with a second abutting surface, the second locking member being movably connected to the second abutting surface and located in the rotating channel; wherein when the loosening state is converted into the clamping state, the rotating seat is rotated to drive the boss to move in the first direction in the clamping cavity, so that the first abutting surface abuts the saw blade in the clamping cavity, and the second abutting surface moves the second locking member in the second direction to abut the saw blade; when the clamping state is converted into the loosening state, the rotating seat is rotated to drive the boss to move in the opposite direction of the first direction in the clamping cavity, so that the first abutting surface disengages the saw blade, and the second abutting surface moves the second locking member in the opposite direction of the second direction to disengage the saw blade.

4. A jigsaw according to claim 3, characterized in that The mounting seat comprises: a base connected to the reciprocating shaft; and two clamping walls spaced apart on the base, the clamping cavity being formed between the two clamping walls, one of the clamping walls being provided with a bearing surface, and the other of the clamping walls being provided with a through hole, the second locking member being movably connected in the through hole, one end of the second locking member extending into the clamping cavity, and the other end abutting against the second abutting surface.

5. A curve saw according to claim 4, characterized in that The second locking member is a cylindrical pin or a ball, and the second locking member is in sliding connection with the through hole.

6. A curve saw according to claim 2, characterized in that The curved saw further comprises a first elastic member, one end of the first elastic member is connected to the mounting seat, and the other end of the first elastic member is connected to the locking structure, and the first elastic member can drive the locking structure to move in the first direction under the action of elastic force.

7. A jigsaw according to claim 6, characterized in that The first locking member is further provided with a handle.

8. A curve saw according to claim 3, characterized in that The edge of the saw blade is provided with a lug, and the boss is provided with a third abutting surface; When the loosened state is changed to the clamped state, the locking structure rotates in the first direction to drive the third abutting surface to abut the lug in the clamping cavity; When the clamped state is changed to the loosened state, the locking structure rotates in the opposite direction of the first direction to drive the third abutting surface to be separated from the lug.

9. A jigsaw according to claim 8, characterized in that The curved saw further comprises a second elastic member, one end of the second elastic member is connected to the mounting seat, and the other end of the second elastic member extends into the clamping cavity, and is used for abutting the lug against the third abutting surface.

10. A curve saw according to claim 4, characterized in that The curved saw further comprises a clamping spring, the clamping spring is sleeved on the clamping wall, and the clamping spring and the base clamp the rotating seat.

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