Electrician screwdriver handle and electrician screwdriver

Abstract

The handle comprises a handle body and a rear cover, a storage cavity is formed in the rear end of the handle body, the rear cover covers the rear end of the handle body, a clamping groove is formed in the outer wall of the handle body, a blocking rod is arranged on the front portion of the clamping groove, a clamping opening is formed between the blocking rod and the front end of the clamping groove, and a bayonet socket is arranged at one end of the rear cover. The bayonet socket is formed by uniformly distributing a plurality of plug-in groove bodies in the circumferential direction, the periphery of the bayonet socket is surrounded by a circle of clamping ring, the clamping ring is used for being inserted into the opening part of the storage cavity and clamped with the opening part of the storage cavity, the rear cover is further provided with plug-in pieces in one-to-one correspondence with the clamping grooves, and the front ends of the plug-in pieces extend forwards to form clamping hooks which penetrate through the lower portions of the blocking rods and are clamped into the clamping openings. The electrician screwdriver adopts the handle. The technical problem that normal use is affected due to the fact that the threaded connection mode of the rear cover at the rear end of the handle and the handle body of a traditional electrician screwdriver is prone to loosening is solved.

Description

Technical Field

[0001] This utility model belongs to the field of hardware tool technology, specifically relating to a screwdriver handle and a screwdriver. Background Technology

[0002] Screwdrivers require a bit size that matches the screw specification. To avoid frequent screwdriver changes for different screw sizes in complex work, interchangeable-bit screwdrivers have emerged on the market. These screwdrivers have a detachable bit and handle. When the screw specification and bit size do not match, the user only needs to remove the bit and replace it with a matching bit to continue working. As a result, one screwdriver may be compatible with multiple bit sizes. The storage of these bits has become a new technical problem. If they are stored in bulk, they are very easy to lose, resulting in missing bit sizes and inability to adapt to different working conditions.

[0003] To address this issue, existing technology CN2339362Y discloses a design scheme called "multi-functional lighting screwdriver". This design scheme sets a storage cavity inside the rear end of the screwdriver handle, then threads a back cover to the open end of the rear end of the storage cavity, sets a slot on the back cover, inserts the screwdriver bit into the slot, inserts the screwdriver bit into the storage cavity, and then threads the back cover to the rear end of the screwdriver handle. This achieves the storage of the screwdriver bit.

[0004] However, based on long-term experience, when using a screwdriver, users usually hold the back cover against their palm and grip the handle with all five fingers to twist it, or they hold the back cover with their index finger and pinch the handle with the other four fingers to rotate it. Since both clockwise and counterclockwise rotations are possible, there is a problem of untightening the back cover when twisting the handle, which requires users to tighten the back cover frequently, causing inconvenience.

[0005] Especially in specialized tools like electrician screwdrivers, the handles are made of non-metallic insulating materials such as plastic and rubber. As a result, the thread strength of the handle and the back cover is relatively lower than that of metal, the elastic deformation is greater, and the aging cycle is shorter. Therefore, the threaded connection between the handle and the back cover of electrician screwdrivers often results in the gap widening due to material aging, leading to loosening of the connection. Vibration of the screwdriver after tightening can also cause the back cover to loosen, making the reliable storage of the screwdriver tip a difficult technical problem to solve. Utility Model Content

[0006] The primary technical problem this invention aims to solve is to provide an electrician's screwdriver handle that addresses the issue of loosening of the threaded connection between the rear cover and the handle body in traditional electrician's screwdriver handles, which affects normal use.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An electrician screwdriver handle includes a handle body and a rear cover. A storage cavity is axially opened inward at the rear end of the handle body. The rear cover is closed on the rear end of the handle body to seal the storage cavity. At least one slot is opened on the outer wall of the handle body. The slot extends forward from the rear end of the handle body to the middle and rear part of the handle body. A stop bar connecting the two sides of the slot is provided at the front part of the slot. The stop bar is integrally formed with the handle body. A locking interface is formed between the stop bar and the front end of the slot. The end of the rear cover facing the storage cavity extends axially outward to form a plug-in seat. The plug-in seat is composed of multiple plug-in slots evenly distributed around the periphery. A retaining ring surrounds the plug-in seat. The retaining ring is used to insert into the opening of the storage cavity and engage with the opening of the storage cavity. The rear cover is also provided with plug-in pieces corresponding to the slots one by one. The front end of the plug-in piece extends forward to form a hook that passes through the bottom of the stop bar and engages with the locking interface. The outer wall of the plug-in piece is flush with the outer wall of the handle body.

[0008] As a preferred embodiment, the bottom of both sides of the card slot is provided with limiting protrusions, which are integrally formed with the handle body. There is a pressing gap between the limiting protrusions and the plug-in piece. The size of the pressing gap is sufficient to allow the card hook to disengage from the card interface and sink completely below the stop bar when the plug-in piece is pressed.

[0009] As a preferred embodiment, the limiting protrusion is inclined backward and inward toward the top surface of the plug-in piece, and when the front end of the plug-in piece is engaged with the card interface, the bottom surface of the plug-in piece is parallel to the top surface of the limiting protrusion.

[0010] As a preferred embodiment, the retaining ring is a regular N-gon, where N ≥ 5, and the inner wall contour of the opening of the storage cavity is adapted to the retaining ring.

[0011] As a preferred embodiment, the insertion slots are evenly distributed along the circumference of a regular hexagon, with the center of each insertion slot forming a hexagonal empty area. Each insertion slot includes a connecting plate and two snap-fit ​​plates respectively connected to both sides of the connecting plate. The two snap-fit ​​plates are symmetrically arranged and form a 120° angle with the connecting plate. The width of the two snap-fit ​​plates is the same as the width of the connecting plate. A V-shaped limiting plate is connected to the edge of the two snap-fit ​​plates away from the connecting plate. The bottom of the limiting plate is connected to the snap-fit ​​plate. The two outer walls of the limiting plate form a 120° angle with the side walls of the snap-fit ​​plate. When multiple insertion slots are evenly distributed circumferentially, adjacent insertion slots share a snap-fit ​​plate. All connecting plates are interconnected to form a central tube of a regular polygon, and a magnet is installed in the central hole of the central tube.

[0012] The technical problem to be solved by this utility model is to provide an electrician screwdriver that solves the problem that the threaded connection between the rear cover and the handle of a traditional electrician screwdriver is prone to loosening, affecting normal use.

[0013] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an electrician screwdriver, including a handle, a shank, and a screwdriver head. The handle is the aforementioned electrician screwdriver handle. The shank is axially inserted into the front end of the handle. There are multiple screwdriver heads, one of which is detachably connected to the front end of the shank, and the remaining screwdriver heads are inserted into the insertion slots on the back cover and stored in the storage cavity.

[0014] As a preferred embodiment, the front end of the handle is integrally injection molded with a regular hexagonal hollow tube. The central hole of the hollow tube is a circular hole, and two keyways are formed on the inner walls on both sides of the circular hole. The keyways extend to the front end of the hollow tube. A cylindrical tool bar is inserted into the hollow tube. A hexagonal front insertion hole is formed at the front end of the tool bar, and an axially extending hexagonal rear insertion hole is formed at the rear end of the tool bar. A positioning key that matches the two keyways is provided on the outer wall of the tool bar. The rear end of the tool bar extends through the hollow tube into the storage cavity. Each insertion slot is arranged around the periphery of the tool bar. A magnet is embedded in the rear insertion hole. The magnet in the rear insertion hole attracts the magnet in the central tube.

[0015] The beneficial effects of this utility model are as follows: This utility model opens a slot at the rear end of the handle and uses the stop bar and the slot to form a slot interface. At the same time, an elastic plug-in piece that fits the slot is set on the back cover, and a hook that cooperates with the slot interface is set at the front end of the plug-in piece. The back cover and the handle are connected by the hook engaging the slot interface. This structure can effectively avoid the problem of loose connection between the back cover and the handle or the back cover falling off. Moreover, no matter which direction the screwdriver is turned during use, the back cover and the handle will not become loose. Attached Figure Description

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the handle and back cover of the electrician screwdriver described in a specific embodiment, showing the handle separated from the back cover.

[0018] Figure 2 This is a schematic diagram of a half-section of the handle of an electrician's screwdriver as described in a specific embodiment;

[0019] Figure 3 This is a schematic diagram of the specific structure of the back cover of the electrician screwdriver handle described in a specific embodiment;

[0020] Figure 4 This is a schematic diagram of the combined state of the electrician screwdriver handle as described in a specific embodiment;

[0021] Figure 5 This is a schematic diagram of a half-section of the electrician's screwdriver described in a specific embodiment;

[0022] Figures 1-5Components: 1. Handle; 2. Rear cover; 3. Storage cavity; 4. Slot; 5. Stop bar; 6. Card interface; 7. Plug-in socket; 8. Plug-in groove body; 801. Connecting plate; 802. Plug-in plate; 803. Limiting plate; 9. Snap ring; 10. Plug-in piece; 11. Snap hook; 12. Limiting protrusion; 13. Pressing gap; 14. Hollow tube; 15. Keyway; 16. Tool bar; 17. Front insertion hole; 18. Rear insertion hole; 19. Positioning key; 20. Magnet; 21. Center tube; 22. Tool head. Detailed Implementation

[0023] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] like Figures 1-4 The illustrated screwdriver handle includes a handle body 1 and a rear cover 2. A storage cavity 3 is axially inwardly formed at the rear end of the handle body 1. The rear cover 2 closes the rear end of the handle body 1 to seal the storage cavity 3. The front end of the handle body 1 is used to connect the screwdriver shank. A slot 4 is formed on the outer wall of the handle body 1, extending forward from the rear end to the middle-rear part of the handle body 1. A stop bar 5 is provided at the front of the slot 4, connecting the inner walls on both sides of the slot 4. The stop bar 5 is integrally formed with the handle body 1, and a locking interface 6 is formed between the stop bar 5 and the front end of the slot 4. The end of the rear cover 2 facing the storage cavity 3 extends axially outward to form a insertion seat 7. The insertion seat 7 is composed of multiple circumferentially distributed insertion slots 8 for inserting the screwdriver tip. A retaining ring 9 surrounds the plug-in 7. The retaining ring 9 is used to insert into and engage with the opening of the storage cavity 3. The rear cover 2 is also provided with a plug-in piece 10 corresponding to the slot 4. The front end of the plug-in piece 10 extends forward to form a hook 11 that passes under the stop bar 5 and engages with the card interface 6. The outer wall of the plug-in piece 10 is flush with the outer wall of the handle 1. The plug-in piece 10 can be designed to be elastic so that when the plug-in piece 10 is pressed, the hook 11 can disengage downward from the card interface 6. In this embodiment, the plug-in piece 10 is thinned at the connection between the plug-in piece 10 and the rear cover 2 to increase the variability of the plug-in piece 10 and reduce the deformation of the main body of the plug-in piece 10, thereby improving the pressure resistance of the main body of the plug-in piece 10.

[0025] The bottom sides of the slot 4 are respectively provided with limiting protrusions 12 extending towards the center of the slot 4. The limiting protrusions 12 are integrally formed with the handle body 1. There is a pressing gap 13 between the limiting protrusions 12 and the plug-in piece 10. The size of the pressing gap 13 is sufficient to allow the hook 11 to disengage from the interface 6 and sink completely below the stop bar 5 when the plug-in piece 10 is pressed. The limiting protrusions 12 are used to limit the downward deformation of the plug-in piece 10 to avoid the plug-in piece 10 being broken due to excessive pressing, thereby improving the service life and stability of the electrician screwdriver handle.

[0026] like Figure 2As shown, the limiting protrusion 12 is inclined backward and inward toward the top surface of the insertion piece 10. When the front hook 11 of the insertion piece 10 is engaged with the card interface 6, the bottom surface of the insertion piece 10 is parallel to the top surface of the limiting protrusion 12. The inclined top surface of the limiting protrusion 12 facilitates the sliding of the insertion piece 10 backward, improving the ease of separation between the back cover 2 and the handle 1.

[0027] In this embodiment, the retaining ring 9 is a regular hexagon, and the inner wall contour of the opening of the storage cavity 3 is adapted to the retaining ring 9. In practical applications, the retaining ring 9 can also be a regular pentagon, a regular octagon, etc., and can be appropriately adjusted according to user needs.

[0028] like Figure 3 As shown, in this embodiment, the insertion slots 8 are evenly distributed along the circumference of a regular hexagon, and the center of the insertion slots 8 forms a regular hexagonal empty area. Each insertion slot 8 includes a connecting plate 801 and two snap-fit ​​plates 802 respectively connected to both sides of the connecting plate 801. The two snap-fit ​​plates 802 are symmetrically arranged and form a 120° angle with the connecting plate 801. The width of the two snap-fit ​​plates 802 is the same as the width of the connecting plate 801. A V-shaped limiting plate 803 is connected to the edge of the two snap-fit ​​plates 802 away from the connecting plate 801. The bottom of the limiting plate 803 is connected to the snap-fit ​​plate 802. The two outer walls of the limiting plate 803 form a 120° angle with the side walls of the snap-fit ​​plate 802. The connecting plate 801, the two snap-fit ​​plates 802 and the two limiting plates 803 together form a semi-open internal hexagonal groove structure for inserting the cutting head. The entire connector 7 has a simple and stable structure. The connector groove 8 can expand to hold the cutter head 22, thereby achieving elastic clamping of the cutter head 22 and making the cutter head 22 stably engaged in the connector groove 8.

[0029] When multiple insertion slots 8 are evenly distributed around the circumference, adjacent insertion slots 8 share a single snap-fit ​​plate 802. All connecting plates 801 are interconnected to form a central tube 21 of a regular polygon. A magnet 20 is installed in the central hole of the central tube 21. This magnet 20 can magnetize the surrounding stored cutting tools, giving them a certain degree of magnetism, which facilitates the connection between the cutting tool and the tool holder, and also makes it easier for the cutting tool to attract screws.

[0030] like Figure 5 This is an electrician's screwdriver based on the aforementioned electrician's screwdriver handle. It includes a handle, a shank 16, and a cutting head 22. The handle is the same as the aforementioned electrician's screwdriver handle. See [link to relevant documentation]. Figures 1-4 The tool holder 16 is axially inserted into the front end of the handle. There are multiple tool heads 22. One tool head 22 is detachably connected to the front end of the tool holder 16, and the remaining tool heads 22 are inserted into the insertion slots 8 on the rear cover 2 and stored in the storage cavity 3. Figure 5 Only one cutter head 22 is symbolically placed in the storage cavity 3. In actual applications, more cutter heads 22 will be stored.

[0031] In this embodiment, a regular hexagonal hollow tube 14 is integrally injection molded at the front end of the handle 1 to improve the connection stability between the hollow tube 14 and the handle 1. The central hole of the hollow tube 14 is a circular hole. Two keyways 15 are opened on the inner walls of both sides of the circular hole. The keyways 15 extend to the front end of the hollow tube 14. A cylindrical blade 16 is inserted into the hollow tube 14. A hexagonal front insertion hole 17 is opened at the front end of the blade 16. An axially extending hexagonal rear insertion hole 18 is opened at the rear end of the blade 16. A positioning key 19 adapted to the two keyways 15 is provided on the outer wall of the blade 16. The rear end of the blade 16 extends through the hollow tube 14 into the storage cavity 3. Each insertion slot 8 is arranged around the blade 16. A magnet 20 is embedded in the rear insertion hole 18. The magnet 20 in the rear insertion hole 18 attracts the magnet 20 in the central tube 21. When the hook 11 and the card interface 6 fail to engage, the two attracting magnets 20 can also prevent the rear cover 2 from falling off.

[0032] The working process of this utility model is as follows: Figures 1-4 As shown, insert the retaining ring 9 on the back cover 2 into the storage cavity 3 at the rear end of the handle 1, while aligning the insert piece 10 with the slot 4. Then push the back cover 2 to close the storage cavity 3, so that the insert piece 10 is inserted into the slot 4 until the hook 11 passes under the stop bar 5 and engages with the slot interface 6, thus completing the connection between the back cover 2 and the handle 1. When it is necessary to separate the back cover 2, simply press the insert piece 10. The insert piece 10 bends downward under pressure, causing the hook 11 to disengage downward from the slot interface 6. Then, the insert piece 10 presses against the two limiting protrusions 12 and slides backward along the inclined surface of the upper end of the limiting protrusions 12, disengaging from the handle 1.

[0033] When the screwdriver with the handle described in this utility model is tightening screws, the rear cover 2 is kept rotating synchronously with the handle 1 by the polygonal retaining ring 9. The two magnets 20 attract each other, magnetizing the screwdriver tip 22 stored in the storage cavity 3, while also improving the connection reliability between the rear cover 2 and the handle 1. Even if the latch 11 and the locking interface 6 malfunction, the rear cover 2 will not fall off or be lost.

[0034] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. An electrician's screwdriver handle, comprising a handle body (1) and a rear cover (2), wherein a storage cavity (3) is axially and inwardly formed at the rear end of the handle body (1), and the rear cover (2) is fitted onto the rear end of the handle body (1) to close the storage cavity (3), characterized in that, At least one slot (4) is provided on the outer wall of the handle (1). The slot (4) extends forward from the rear end of the handle (1) to the middle and rear part of the handle (1). A stop bar (5) is provided at the front of the slot (4) to connect the two sides of the slot (4). The stop bar (5) is integrally formed with the handle (1). A slot interface (6) is formed between the stop bar (5) and the front end of the slot (4). The end of the rear cover (2) facing the storage cavity (3) extends axially outward to form a plug-in seat (7). The plug-in seat (7) consists of multiple The insertion slot (8) is evenly distributed around the periphery. A retaining ring (9) surrounds the insertion seat (7). The retaining ring (9) is used to insert into the opening of the storage cavity (3) and engage with the opening of the storage cavity (3). The back cover (2) is also provided with an insertion piece (10) that corresponds one-to-one with the card slot (4). The front end of the insertion piece (10) extends forward to form a hook (11) that passes through the bottom of the stop bar (5) and engages with the card interface (6). The outer wall of the insertion piece (10) is flush with the outer wall of the handle (1).

2. The electrician's screwdriver handle according to claim 1, characterized in that, The bottom of both sides of the card slot (4) is provided with limiting protrusions (12). The limiting protrusions (12) are integrally formed with the handle (1). There is a pressing gap (13) between the limiting protrusions (12) and the plug-in piece (10). The size of the pressing gap (13) is sufficient to make the hook (11) disengage from the card interface (6) and sink completely to below the stop bar (5) when the plug-in piece (10) is pressed.

3. The electrician's screwdriver handle according to claim 2, characterized in that, The limiting protrusion (12) is inclined backward and inward toward the top surface of the plug-in piece (10). When the front end hook (11) of the plug-in piece (10) is inserted into the card interface (6), the bottom surface of the plug-in piece (10) is parallel to the top surface of the limiting protrusion (12).

4. The electrician's screwdriver handle according to claim 1, characterized in that, The retaining ring (9) is a regular N-gon, N≥5, and the inner wall contour of the opening of the storage cavity (3) is adapted to the retaining ring (9).

5. The electrician's screwdriver handle according to claim 1, characterized in that, The insertion slots (8) are evenly distributed along the circumference of a regular hexagon, and the center of each insertion slot (8) forms a regular hexagonal empty area. Each insertion slot (8) includes a connecting plate (801) and two snap-fit ​​plates (802) respectively connected to both sides of the connecting plate (801). The two snap-fit ​​plates (802) are symmetrically arranged and form a 120° angle with the connecting plate (801). The width of the two snap-fit ​​plates (802) is the same as the width of the connecting plate (801), and the two snap-fit ​​plates (802) are far away from the connecting plate (801). A V-shaped limiting plate (803) is connected to one side edge. The bottom of the limiting plate (803) is connected to the snap-fit ​​plate (802). The two outer walls of the limiting plate (803) and the side walls of the snap-fit ​​plate (802) form a 120° angle. When multiple insertion slots (8) are evenly distributed around the perimeter, adjacent insertion slots (8) share a snap-fit ​​plate (802). All connecting plates (801) are connected to each other to form a regular polygonal central tube (21). A magnet (20) is provided in the central hole of the central tube (21).

6. An electrician's screwdriver, comprising a handle, a shank (16), and a cutting head (22), characterized in that, The handle is the electric screwdriver handle according to any one of claims 1 to 5. The handle (16) is axially inserted into the front end of the handle. There are multiple blades (22), one of which is detachably connected to the front end of the handle (16), and the remaining blades (22) are inserted into the insertion slot (8) on the back cover (2) and stored in the storage cavity (3).

7. The electrician's screwdriver according to claim 6, characterized in that, The front end of the handle (1) is integrally injection molded with a regular hexagonal hollow tube (14). The central hole of the hollow tube (14) is a round hole. Two keyways (15) are opened on the inner walls on both sides of the round hole. The keyways (15) extend to the front end of the hollow tube (14). A cylindrical tool bar (16) is inserted into the hollow tube (14). A hexagonal front insertion hole (17) is opened at the front end of the tool bar (16). An axially extending hexagonal rear insertion hole (18) is opened at the rear end of the tool bar (16). A positioning key (19) that matches the two keyways (15) is provided on the outer wall of the tool bar (16). The rear end of the tool bar (16) extends through the hollow tube (14) into the storage cavity (3). Each insertion slot (8) is arranged around the periphery of the tool bar (16). A magnet (20) is embedded in the rear insertion hole (18). The magnet (20) in the rear insertion hole (18) attracts the magnet (20) in the central tube (21).

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