CN209158219U - A new type of self-righting screwdriver - Google Patents

Abstract

A new type of self-centering screwdriver, comprising a handle, a handle, a screwdriver head, a trigger cap, a movable rod and a clamping device, the upper end of the handle is inserted into the handle and fixedly connected, the lower end of the handle is fixedly provided with a screwdriver head, and the handle is along the axis A central through hole is provided in the direction for the movable rod to pass through. The movable rod is located in the central through hole. The upper end of the movable rod is fixedly connected to the trigger cap. , the upper end of the movable rod extends into the groove, and a spring is arranged in the groove; the lower end of the movable rod is slidably inserted into the screwdriver head, and the clamping device is arranged on the screwdriver head and is in sliding contact with the lower end of the movable rod; the clamping device includes about Two clamping units arranged symmetrically along the axis of the screwdriver head. The self-centering screwdriver retains the advantages of small and flexible traditional screwdrivers, and can clamp the screw when screwing the screw, and no longer needs to straighten the screw by hand, making screwing the screw more convenient and more efficient.

Description

A new type of self-righting screwdriver

technical field

The utility model relates to a screwdriver, in particular to a novel self-righting screwdriver.

Background technique

A screwdriver is a tool used to turn a screw to force it into place. Compared with electric screwdrivers, traditional screwdrivers are small, flexible, and cost-effective. However, when using a traditional screwdriver, you need to fix the position of the screw by hand, and then use the other hand to turn the screw with the screwdriver. For some small screws, the hand cannot straighten the screw, which is very troublesome when installing the screw. It is difficult to fix the screw. The fixed position often deviates, which is time-consuming and labor-intensive, and does not achieve the expected effect.

Utility model content

The utility model provides a novel self-righting screwdriver, so that people do not need to straighten the screw by hand first when using the screwdriver.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present utility model is as follows:

A new self-righting screwdriver, comprising a handle, a shank, a screwdriver head, a trigger cap, a movable rod and a clamping device,

The upper end of the knife rod is inserted into the knife handle and fixedly connected, the lower end of the knife rod is fixed with a screwdriver head, the knife rod is provided with a central through hole for the movable rod to pass through along the axis direction, the movable rod is located in the central through hole, and the upper end of the movable rod is fixedly connected to trigger Cap, the trigger cap is inserted into the handle by the groove set in the top of the handle and connected to the upper end of the movable rod, the upper end of the movable rod extends into the groove, a spring is arranged in the groove, the spring is sleeved on the upper end of the movable rod, the spring The lower end of the spring is connected to the bottom of the groove groove, and the upper end of the spring is connected to the trigger cap; the lower end of the movable rod is slidably inserted into the trigger groove set in the screwdriver head, and the clamping device is arranged on the screwdriver head and is in sliding contact with the lower end of the movable rod;

The clamping device includes two clamping units symmetrically arranged with respect to the axis direction of the screwdriver bit, both of which include a connecting rod, a return spring mechanism and a clamping plate, and one end of the connecting rod is horizontally inserted into the screwdriver head and extends into the triggering recess. The groove is in contact with the lower end of the sliding movable rod; the other end of the connecting rod is connected to the reset spring mechanism, the reset spring mechanism is arranged on the outer wall of the screwdriver head, and the clamping plate is connected to the reset spring mechanism through the first connecting plate.

A novel self-righting screwdriver using the above structure, pressing the trigger cap, the movable rod moves downward, the lower end of the movable rod is inserted into the ends of the two connecting rods, and with the downward movement of the movable rod, one end of the connecting rod inserted into the screwdriver head is pushed outwards Move, so as to drive the clamping plate to move in the axial direction of the cutter rod through the reset spring mechanism, so as to clamp the screw, and rotate the screwdriver to fix the screw on the object; loosen the trigger cap, the trigger device is at the top of the handle The action of the spring The bottom end of the movable rod is gradually moved away from between the ends of the two connecting rods, and the end of the connecting rod inserted into the screwdriver head moves in the axial direction of the knife rod, thereby driving the clamp through the reset spring mechanism. The new self-centering screwdriver can be removed from the screw by moving the tightening plate in the opposite direction to the axial direction of the arbor.

Further, the return spring mechanism includes a casing, a rotating shaft, two connecting plates, a first limit plate and a second limit plate,

The shell is cylindrical, and the shell is provided with a cavity for placing the rotating shaft, two connecting plates, the first limit plate and the second limit plate,

The two ends of the rotating shaft are respectively connected to the upper and lower bottom surfaces of the casing for vertical rotation, and the rotating shaft is arranged at the center of the casing,

The two connecting plates are respectively connected on both sides of the rotating shaft and are arranged symmetrically with respect to the rotating shaft, and a reset device is provided on the two connecting plates,

One side of the first limit plate and one side of the second limit plate are respectively vertically fixed and connected to the free ends of the two connecting plates and are symmetrically arranged with respect to the axis of the rotating shaft. The first limit plate and the second limit plate are Arc plate and the arc is the same as the arc of the shell,

A through slot is formed on the cavity wall of the casing at a position corresponding to the first limit plate and the second limit plate,

The outer surface of the first limit plate is connected with the other end of the connecting rod, and the first limit plate can be rotated in the casing under the driving of the other end of the connecting rod. The first limit plate and the second limit plate are 90 degree arcs. shape plate and the connection of the other end of the connecting rod on the first limit plate is the middle position of the first limit plate,

The outer surface of the second limiting plate is connected to the first connecting plate.

Further, the reset device includes at least one reset spring arranged on the two connecting plates in opposite directions to the first limit plate and the second limit plate, and one end of the reset spring is respectively fixed on the connecting plate. , and the other end is fixedly connected to the shell.

Further, the clamping plate includes an arc-shaped plate, a fan-shaped plate and a transition connecting plate, the arc-shaped plate is arranged above the fan-shaped plate, the arc-shaped plate and the fan-shaped plate are connected by a transition connecting plate, and the top of the arc-shaped plate is connected to the first connecting plate, and the concave surface of the arc-shaped plate faces the screwdriver head; the concave surface of the fan-shaped plate faces the screwdriver head.

When the screw is clamped, the concave surfaces of the two sector plates of the two clamping units are abutted on the screw for clamping.

Further, the lower end of the movable rod is processed into a conical shape,

One end of the connecting rod is connected with an extension rod, one end of the extension rod is connected with the connecting rod, the other end of the extension rod is processed into a circle, and the other end of the extension rod is horizontally inserted into the screwdriver head and extends into the trigger groove and the sliding movable rod Tapered lower end contacts. The lower end of the lower end of the movable rod is processed into a tapered shape, and the other end of the extension rod is processed into a circular shape, which can reduce the resistance of the bottom end of the movable rod to push the connecting rod to move outward, and make the automatic centering screwdriver work more smoothly.

Further, the top end of the handle is provided with a cover, the upper end of the movable rod passes through the handle and is fixedly connected to the trigger cap, and the trigger cap is inserted into the top cover and connected to the upper end of the movable rod by the groove provided in the top of the top cover. The upper end of the spring extends into the groove, a spring is arranged in the groove, the spring is sleeved on the upper end of the movable rod, the lower end of the spring is connected to the bottom of the groove, and the upper end of the spring is connected to the trigger cap. The top cover is provided to facilitate the replacement of the spring when the spring is damaged.

Compared with the prior art, the beneficial effects of the present utility model are: the self-righting screwdriver retains the advantages of small and flexible traditional screwdrivers, and can clamp the screw when screwing the screw, and no longer needs to straighten the screw by hand. More convenient and more efficient.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a new type of self-righting screwdriver according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the position of the spring in a novel automatic centering screwdriver according to an embodiment of the present invention.

3 is a schematic diagram of a screwdriver head and a clamping device in a novel self-righting screwdriver according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of FIG. 3 .

FIG. 5 is a schematic diagram of another viewing angle of FIG. 3 .

6 is an internal schematic diagram of a return spring mechanism in a novel self-righting screwdriver according to an embodiment of the present invention (a bottom surface of the casing is hidden in the figure).

7 is a schematic structural diagram of the connection between the first connecting plate and the return spring mechanism in a new type of self-righting screwdriver according to an embodiment of the present invention.

Detailed ways

In order to better understand the present utility model, the contents of the present utility model are further explained below in conjunction with the embodiments, but the contents of the present utility model are not limited to the following embodiments.

As shown in Figure 1-7, a new type of self-centering screwdriver includes a handle 1, a top cover 10, a blade shank 2, a screwdriver head 3, a trigger cap 6, a movable rod 4 and a clamping device,

As shown in Figure 1, Figure 2, Figure 4, the top of the handle 1 is provided with a top cover 10, the upper end of the handle 2 is inserted into the handle 1 and fixedly connected, the lower end of the handle 2 is fixedly provided with a screwdriver bit 3, and the handle 2 is along the A central through hole 201 is provided in the axial direction for the movable rod 4 to pass through. The movable rod 4 is located in the central through hole 201. The upper end of the movable rod 4 passes through the handle 1 and is fixedly connected to the trigger cap 6. The trigger cap 6 is formed by the top of the top cover 10. The recessed groove 101 is inserted into the top cover 10 and connected to the upper end of the movable rod 4. The upper end of the movable rod 4 extends into the groove 101, and a spring 11 is arranged in the groove. The spring 11 is sleeved on the upper end of the movable rod 4. The spring The lower end of 11 is connected to the groove bottom of groove 101, and the upper end of spring 11 is connected to trigger cap 6; the lower end of movable rod 4 is processed into a conical shape and is slidably inserted into the trigger groove 301 provided in screwdriver head 3, and the clamping device is arranged on the screwdriver head. 3 and sliding contact with the lower end of the movable rod 4; when the trigger cap 6 is pressed, the movable rod 4 connected with the trigger cap 6 moves down, the trigger cap 6 squeezes the spring 11, the spring 11 compresses, and the screw is fixed without clamping When the screw is released, the trigger cap 6 is released, the spring 11 stretches, pushes the trigger cap 6 back up to the position before pressing, and drives the movable rod 4 to move upward;

As shown in FIGS. 3 , 4 , 5 and 7 , the clamping device of this embodiment includes two clamping units symmetrically arranged with respect to the axial direction of the screwdriver bit 3 , and the two clamping units both include connecting rods 5 , The return spring mechanism and the clamping plate 9, one end of the connecting rod 5 is connected with an extension rod 12, one end of the extension rod 12 is connected with the connecting rod 5, the other end of the extension rod 12 is processed into a circle, and the other end of the extension rod 12 is horizontal Insert into the screwdriver head 3 and extend into the trigger groove 301 to contact the lower end of the sliding movable rod 4 which is tapered; the other end of the connecting rod 5 is connected to the return spring mechanism 8, and the return spring mechanism 8 is arranged on the outer wall of the screwdriver head 3, The clamping plate 9 is connected to the return spring mechanism 8 via the first connecting plate 7 .

As shown in FIG. 6 , the return spring mechanism of this embodiment includes a casing 801 , a rotating shaft 802 , two connecting plates 803 , a first limiting plate 804 and a second limiting plate 805 . The casing 801 is cylindrical, and the casing 801 has a There is a cavity for placing the rotating shaft 802, two connecting plates 803, the first limiting plate 804 and the second limiting plate 805. The rotating shaft 802 is arranged at the center of the casing 801 and the two ends of the rotating shaft 802 are respectively connected to the casing for vertical rotation. On the upper and lower bottom surfaces of 801, the two ends of the rotating shaft 802 are arranged on the bearing seat, and the bearing seat is fixed on the bottom surface of the casing 801; the two connecting plates 803 are respectively connected on both sides of the rotating shaft 802 and are symmetrically arranged about the rotating shaft 802. A reset device is provided on each of the connecting plates, one side of the first limiting plate 804 and one side of the second limiting plate 805 are respectively vertically fixedly connected to the free ends of the two connecting plates 803 and symmetrically arranged with respect to the axis of the rotating shaft 802 , the first limit plate 804 and the second limit plate 805 are arc-shaped plates and the radian is the same as that of the casing 801 , and the first limit plate 804 and the second limit plate 805 on the cavity wall of the casing 801 are in phase with each other. A through slot 807 is opened at the corresponding position, and the reset device includes at least one reset spring 11 provided on the two connecting plates 803 in opposite directions to the first limit plate 804 and the second limit plate 805 respectively. The return springs 11 on each connection plate 803 are arranged in parallel. One end of the return spring 11 is fixed on the connection plate 803, and the other end is fixedly connected to the housing 801. The shaft 802 can be rotated. The first limit plate 804 and the second limit When the plate 805 is forced to move in the opposite direction, the setting of the return spring 11 can restore the first limit plate 804 and the second limit plate 805 to the original state;

The other end of the connecting rod 5 is connected to the outer surface of the first limiting plate 804 through the through groove 807, and the first limiting plate 804 can be rotated in the housing 801 under the driving of the other end of the connecting rod 5. The first limit plate 804 and the second limit plate 805 are arc-shaped plates with a central angle of 90 degrees. The connection between the first limit plate 804 and the connecting rod 5 is the center of the first limit plate 804, that is, the center of the circle. The angle is 45 degrees;

The outer surface of the second limiting plate 805 is connected to the first connecting plate 7 .

The clamping plate 9 of this embodiment includes an arc-shaped plate 901 , a fan-shaped plate 902 and a transition connecting plate 903 . The arc-shaped plate 901 is arranged above the fan-shaped plate 902 , and the arc-shaped plate 901 and the fan-shaped plate 902 pass through the transition connecting plate 903 For connection, the top of the arc-shaped plate 901 is connected to the first connecting plate 7 , and the concave surface of the arc-shaped plate 901 faces the screwdriver head 3 , and the concave surface of the fan-shaped plate 902 faces the screwdriver head 3 . When clamping the screw, the concave surfaces of the two clamping unit sector plates are fitted on the screw to clamp the screw.

When in use, put the screw between the clamping plates 9, align the screw with the screwdriver head 3, press the trigger cap 6, as shown in Figure 3, the arrow in the figure indicates the direction of force movement, the movable rod 4 moves down and pushes the screwdriver head 3 The inner extension rod 12 moves outward, and the other end of the connecting rod 5 drives the first limit plate 804 in the return spring mechanism 8 to move away from the axial direction of the cutter rod 2, that is, the direction A in FIG. 6 . The second limit plate 805 moves in the axial direction of the cutter bar 2 under the action of the first limit plate 804 and the rotating shaft 802 , that is, in the opposite direction of A, thereby driving the sector plate 902 in the clamping plate 9 toward the screwdriver head 3 Moving in the axial direction, the distance between the two fan-shaped plates 902 is reduced, the concave surfaces of the two fan-shaped plates 902 are fitted to clamp the screws, and at this time, the screw driver can be rotated to tighten the screws. In order to save effort and quickly tighten the screws, the trigger cap 6 can be loosened when most of the screws are tightened into the object without any further deflection, and then the screws can be quickly and completely screwed into the object. After releasing the trigger cap 6, the spring 11 stretches and pushes the trigger cap 6 to return to its original position, and drives the movable rod 4 to move upward, and the lower end of the movable rod 4 gradually moves away from the circular ends of the two extension rods 12. The extension rod 12 Moving in the direction of the axis of the screwdriver head 3 drives the connecting rod 5 to move in the direction of the screwdriver head 3, and the distance between the two sector plates 902 increases, so that the self-centering screwdriver can be moved away from the screw.

Claims (6)

1. A novel self-righting screwdriver is characterized in that: comprising a handle (1), a blade rod (2), a screwdriver head (3), a trigger cap (6), a movable rod (4) and a clamping device, The upper end of the knife rod (2) is inserted into the knife handle (1) and fixedly connected, the lower end of the knife rod (2) is fixedly provided with a screwdriver head (3), and the knife rod (2) is provided with a center along the axis direction for the movable rod (4) to penetrate The through hole (201), the movable rod (4) is located in the central through hole (201), the upper end of the movable rod (4) is fixedly connected to the trigger cap (6), and the trigger cap (6) is concavely arranged on the top of the handle (1) The groove (101) is inserted into the handle (1) and connected to the upper end of the movable rod (4), the upper end of the movable rod (4) extends into the groove (101), and a spring (11) is arranged in the groove (101). , the spring (11) is sleeved on the upper end of the movable rod (4), the lower end of the spring (11) is connected to the bottom of the groove (101), the upper end of the spring (11) is connected to the trigger cap (6); the lower end of the movable rod (4) Slide and insert into the trigger groove (301) provided in the screwdriver head (3), and the clamping device is arranged on the screwdriver head (3) and is in sliding contact with the lower end of the movable rod (4); The clamping device includes two clamping units symmetrically arranged with respect to the axial direction of the screwdriver bit (3), and the two clamping units each include a connecting rod (5), a return spring mechanism (8) and a clamping plate (9), which are connected to One end of the rod (5) is horizontally inserted into the screwdriver head (3) and extends into the trigger groove (301) to contact the lower end of the sliding movable rod (4); the other end of the connecting rod (5) is connected to the return spring mechanism (8), the return spring The mechanism (8) is arranged on the outer wall of the screwdriver head (3), and the clamping plate (9) is connected to the return spring mechanism (8) through the first connecting plate (7). 2. A new type of self-righting screwdriver according to claim 1, characterized in that: the return spring mechanism (8) comprises a casing (801), a rotating shaft (802), two connecting plates (803), a first limit plate (804) and the second limit plate (805), The casing (801) is cylindrical, and the casing (801) is provided with a cavity for placing the rotating shaft (802), the two connecting plates (803), the first limiting plate (804) and the second limiting plate (805). , The two ends of the rotating shaft (802) are respectively connected to the upper and lower bottom surfaces of the casing (801) for vertical rotation, and the rotating shaft (802) is arranged at the center of the casing (801), The two connecting plates (803) are respectively connected on both sides of the rotating shaft (802) and are symmetrically arranged with respect to the rotating shaft (802), and a reset device is provided on the two connecting plates, One side of the first limiting plate (804) and one side of the second limiting plate (805) are respectively vertically fixedly connected to the free ends of the two connecting plates (803) and symmetrically arranged with respect to the axis of the rotating shaft (802), The first limiting plate (804) and the second limiting plate (805) are arc-shaped plates and the radian is the same as that of the housing (801), A through groove (807) is formed on the cavity wall of the housing (801) at positions corresponding to the first limiting plate (804) and the second limiting plate (805), The outer surface of the first limiting plate (804) is connected with the other end of the connecting rod (5) and the first limiting plate (804) can be rotated in the casing (801) under the driving of the other end of the connecting rod (5). The first limit plate (804) and the second limit plate (805) are 90-degree arc plates, and the connection of the other end of the connecting rod (5) on the first limit plate (804) is the first limit plate (804). 804) at the middle position, The outer surface of the second limiting plate (805) is connected to the first connecting plate (7). 3. A new type of self-righting screwdriver according to claim 2, characterized in that: the reset device comprises a first limit plate (804) and a second limit plate (805) on the two connecting plates (803), respectively. ) are provided with at least one return spring (11) in the opposite direction, the return spring (11) on each connecting plate (803) is arranged in parallel, and one end of the return spring (11) is fixed on the connecting plate (803) , and the other end is fixedly connected to the shell (801). 4. A new type of self-righting screwdriver according to claim 1, characterized in that: the clamping plate (9) comprises an arc-shaped plate (901), a fan-shaped plate (902) and a transition connecting plate (903), The arc-shaped plate (901) is arranged above the fan-shaped plate (902), the arc-shaped plate (901) and the fan-shaped plate (902) are connected by a transition connecting plate (903), and the top of the arc-shaped plate (901) is connected to the first connecting the plate (7), and the concave surface of the arc-shaped plate (901) faces the screwdriver head (3); The concave surface of the sector plate (902) faces the screwdriver head (3). 5. A new type of self-righting screwdriver according to claim 1, characterized in that: the lower end of the movable rod (4) is processed into a conical shape, One end of the connecting rod (5) is connected with an extension rod (12), one end of the extension rod (12) is connected with the connecting rod (5), the other end of the extension rod (12) is processed into a circle, and the other end of the extension rod (12) is rounded. One end is horizontally inserted into the screwdriver head (3) and extends into the trigger groove (301) to contact the lower end of the sliding movable rod (4) which is tapered. 6. A novel self-righting screwdriver according to claim 1, characterized in that: the top of the handle (1) is provided with a top cover (10), and the upper end of the movable rod (4) passes through the handle (1) and The trigger cap (6) is fixedly connected, and the trigger cap (6) is inserted into the top cover (10) through a groove (101) concavely provided at the top of the top cover (10) and connected to the upper end of the movable rod (4). The movable rod (4) The upper end of the spring (101) extends into the groove (101), a spring (11) is arranged in the groove, the spring (11) is sleeved on the upper end of the movable rod (4), and the lower end of the spring (11) is connected to the groove bottom of the groove (101), The upper end of the spring (11) is connected to the trigger cap (6).