A multi-head screwdriver
By incorporating magnetic components and multiple sleeves, the problem of loosening of the handle caused by wear in multi-head screwdrivers is solved, resulting in a simple and low-cost multi-head screwdriver design suitable for both household and industrial environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO RONGYUAN INTELLIGENT TECH CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-10
AI Technical Summary
Existing multi-head screwdrivers often experience loosening of the insertion slot due to wear on the handle during frequent use, and the locking mechanism of existing technologies is complex.
It adopts a magnetic attachment and multiple sleeve design. The sleeves are fixedly connected by protrusions. The rod and the sleeves are restricted from circumferential rotation by a transverse groove. The sleeves are replaceable to solve the wear problem. The placement groove adopts an irregular shape design to ensure the correct installation of the bit.
It enables simple replacement of the sleeve after wear, avoids loosening of the tool holder and the slot, has a simple structure and low cost, and is suitable for home and industrial environments.
Smart Images
Figure CN224476136U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of screwdriver technology, and more specifically to a multi-head screwdriver. Background Technology
[0002] A screwdriver is a common tool used to tighten or loosen screws to put them in place.
[0003] The tips of existing multi-head screwdrivers are replaceable. When replacing them, you can simply pull out the tip. However, because screwdrivers are used frequently, the frequent insertion and removal will wear down the handle, increasing the gap between the handle and the tip. This can cause the tip to become loose when installed in the slot.
[0004] To address the aforementioned problems, patent document (CN118848870A) discloses a multi-head screwdriver, including a handle, a locking block, and a blade body. The handle is for handheld use; the locking block is installed at one end of the handle; the blade body is inserted into the locking block; the handle houses multiple replaceable blade bodies; the blade handle is fixedly inserted into the insertion slot of the locking block via a pair of locking mechanisms. The locking mechanism includes: a connecting plate slidably disposed within the mounting slot; a first compression spring connected between the connecting plate and the mounting slot; and at least one locking rod connected to the connecting plate, the locking rod capable of engaging with a slot in the blade handle. By engaging the locking rod with the slot in the blade handle, even if the side of the blade handle is worn and significantly smaller than the size of the insertion slot, the locking rod's limitation on the blade handle will restrict circumferential movement of the blade handle. However, the locking mechanism structure in the aforementioned patent document is relatively complex.
[0005] Therefore, there is a need for a multi-head screwdriver with a simpler structure that can, to some extent, solve the problem of loosening between the handle and the slot when the handle is worn out. Summary of the Invention
[0006] The main objective of this application is to provide a multi-head screwdriver, wherein the multi-head screwdriver includes a handle, a plurality of bits, and a magnetic chuck. The handle has a storage groove and a plurality of internal cavities. The bottom of the storage groove has a protrusion fixed to the handle. The sidewall of the storage groove has a hard coating. One bit is disposed in the storage groove. Each internal cavity contains one bit. Each bit includes a shaft and a plurality of sleeves. Both ends of the shaft have a fitting portion and an external thread. Each sleeve is disposed at the end of the shaft opposite to the fitting portion and is threaded with the shaft. The screwdriver bit is connected by a threaded joint. The end of the rod body opposite to the insert part also has a through first transverse groove. Each sleeve has a through second transverse groove, which is directly opposite the first transverse groove. The protrusion passes through both the first transverse groove and the second transverse groove on one of the sleeves. The magnetic suction member is fixedly connected to the protrusion. The material of the bit is magnetic metal. Compared with the prior art, this application achieves the advantage of simpler structure by setting multiple sleeves and replacing one sleeve after another wears out. It also solves the problem of loosening between the tool handle and the insert groove when the tool handle is worn out to a certain extent.
[0007] Another objective of this application is to provide a multi-head screwdriver, wherein one cross-section of the placement groove is hexagonal, and the five sides of the hexagon are of equal length, and the length of the remaining side is greater than the length of any of the other five sides, so that after the screwdriver bit is placed in the placement groove, the protrusion is directly opposite the first horizontal groove.
[0008] To achieve at least one of the above-mentioned objectives, this application provides a multi-start screwdriver, wherein the multi-start screwdriver comprises:
[0009] The knife handle has a placement groove and several internal cavities. The bottom of the placement groove has a protrusion fixed to the knife handle, and the sidewall of the placement groove has a hard coating.
[0010] A plurality of bit tools are provided, one bit tool being disposed in the placement slot, and each of the inner cavities is provided with one bit tool. Each bit tool tool includes a rod body and a plurality of sleeves. The two ends of the rod body are respectively provided with a fitting portion and an external thread. Each sleeve is disposed at the end of the rod body away from the fitting portion and is threadedly connected to the rod body. The end of the rod body away from the fitting portion also has a through first transverse groove. Each sleeve has a through second transverse groove, the second transverse groove being directly opposite the first transverse groove. The protrusion passes through both the first transverse groove and the second transverse groove on one of the sleeves.
[0011] A magnetic suction component is fixedly connected to the protrusion, and the bit is made of magnetic metal.
[0012] In one or more embodiments of this application, one cross-section of the placement groove is hexagonal, and the five sides of the hexagon are of equal length, with the length of the remaining side being greater than the length of any one of the other five sides.
[0013] In one or more embodiments of this application, the outer wall of the knife handle is covered with a rubber layer.
[0014] In one or more embodiments of this application, the multi-head screwdriver further includes a turntable, which is rotatably mounted on the end of the handle away from the bit and blocks the opening of the inner cavity. The turntable has a hole, and when the turntable rotates a predetermined angle, the hole is directly opposite the inner cavity or the hole is misaligned with the inner cavity.
[0015] In one or more embodiments of this application, a second magnet is embedded in the turntable, and a third magnet is embedded in the end of the shank opposite to the bit. When the second magnet and the third magnet are attracted to each other, the hole and the inner cavity are misaligned.
[0016] In one or more embodiments of this application, the turntable has a central hole, and the multi-head screwdriver further includes a screw that passes through the central hole and is threadedly connected to the turntable.
[0017] In one or more embodiments of this application, the protrusion is integrally injection molded with the tool holder.
[0018] In one or more embodiments of this application, the side wall of the knife handle near the placement groove has an insertion hole, and the protrusion is a strip of metal that extends into the insertion hole.
[0019] In one or more embodiments of this application, one end of the socket opening has an internal thread, and the multi-head screwdriver further includes a pressing member. The pressing member is connected to the internal thread at the socket opening by a threaded connection, and one end of the pressing member abuts against one end of the strip metal piece.
[0020] In this embodiment, the multi-head screwdriver includes a handle, several bits, and a magnetic attractor. The handle has a placement groove and an inner cavity. The bottom of the placement groove has a protrusion fixed to the handle. The sidewall of the placement groove has a hard coating. A bit is placed in the placement groove, and the inner cavity contains the bit. The bit includes a shaft and multiple sleeves. Both ends of the shaft have a fitting portion and an external thread. Each sleeve is located at the end of the shaft away from the fitting portion and is threaded to the shaft. The end of the shaft away from the fitting portion also has a first transverse groove. Each sleeve has a second transverse groove, which is directly opposite the first transverse groove. The protrusion passes through both the first transverse groove and the second transverse groove on one sleeve. The magnetic attractor is fixedly connected to the protrusion. The bit is made of magnetic metal. Compared with the prior art, this application achieves a simpler structure by setting multiple sleeves, allowing replacement of one sleeve after wear. This solves the problem of loosening between the handle and the fitting groove when the handle is worn out. Attached Figure Description
[0021] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:
[0022] Figure 1 The figure shows a structural schematic diagram of a multi-head screwdriver according to the first embodiment of this application;
[0023] Figure 2 The diagram illustrates the structure of the sleeve;
[0024] Figure 3 The diagram shows Figure 1 A magnified view of a portion at point C;
[0025] Figure 4 The figure shows a top view of a multi-head screwdriver according to the first embodiment of this application;
[0026] Figure 5 The diagram shows Figure 1 Sectional view at DD-;
[0027] Figure 6 The figure shows a structural schematic diagram of a multi-head screwdriver according to the second embodiment of this application. Detailed Implementation
[0028] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.
[0029] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.
[0030] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0031] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.
[0032] Indicative multi-head screwdriver, for reference Figures 1 to 6 A multi-head screwdriver according to any preferred embodiment of the present invention includes a handle 10 and a bit 20.
[0033] Specifically, in any embodiment of this application, such as Figure 1 As shown, the tool holder 10 has a placement groove 101 and a plurality of inner cavities 102. The placement groove 101 is used to place a bit 20 for tightening external bolts. The inner cavities 102 are used to store bits 20 of other sizes. That is, a bit 20 is placed in the placement groove 101, and a bit 20 is provided in each inner cavity 102.
[0034] Additionally, in any embodiment of this application, such as Figure 1 As shown, each bit 20 includes a rod body 201 and a plurality of sleeves 202. The two ends of the rod body 201 have a fitting portion 2011 and an external thread, respectively. The sleeves 202 are all located at the end of the rod body 201 away from the fitting portion 2011 and are threadedly connected to the rod body 201.
[0035] It should be noted that in this application, there are two sleeves 202. In use, one sleeve 202 extends into the placement groove 101, and the outer wall of this sleeve 202 is in contact with the side wall of the placement groove 101. The other sleeve 202 is located above the opening of the placement groove 101. The fitting part 2011 is used to cooperate with the slot, cross slot or hexagonal slot on the external screw. By rotating the handle 10, the external screw is driven to rotate circumferentially. Furthermore, by setting multiple sleeves 202 and fitting them onto the rod body 201, when the outer wall of one sleeve 202 is severely worn after long-term use, causing excessive gap between the side wall of this sleeve 202 and the groove wall of the placement groove 101, and causing the bit 20 to move radially within the placement groove 101, both sleeves 202 can be unscrewed from the rod body 201, and after swapping the positions of the two sleeves 202, they can be repositioned. The new screwdriver bit 200 is rotated back onto the rod body 201. Since the outer wall of the sleeve 202 previously located above the slot opening of the placement groove 101 was almost unworn during use, after the sleeve 202 is repositioned, it fits snugly against the groove wall of the placement groove 101, thus solving the problem of the screwdriver bit 20 becoming loose after long-term use. It should also be noted that the more sleeves 202 there are, the longer the loosening problem of the screwdriver bit 20 can be avoided. It is evident that compared to the prior art, which requires a guide rod, compression spring, and insertion rod, this application has the advantages of a simpler structure and a certain degree of solution to the problem of loosening between the tool holder and the insertion groove when the tool holder is heavily worn.
[0036] However, since the engagement part 2011 will rotate circumferentially when the external screw is tightened, the rod body 201 may separate from the sleeve 202.
[0037] Therefore, in any embodiment of this application, such as Figure 1 and Figure 3 As shown, the end of the rod body 201 opposite to the fitting part 2011 also has a through first transverse groove 203, and each sleeve 202 has a through second transverse groove 204, which is directly opposite the first transverse groove 203. In addition, the bottom of the placement groove 101 has a protrusion 1011 fixed to the handle 10, and the protrusion 1011 passes through both the first transverse groove 203 and the second transverse groove 204 on one of the sleeves 202.
[0038] It should be noted that by having the protrusion 1011 pass through both the first transverse groove 203 and the second transverse groove 204, and because the position of the protrusion is fixed, the protrusion 1011 will simultaneously restrict the rod 201 and the sleeve 202 from rotating circumferentially, thereby avoiding the technical problem of the rod 201 rotating circumferentially relative to the sleeve 202 and separating the rod 201 from the sleeve 202 during the screwing process.
[0039] Additionally, to prevent the bit 20 from dislodging from the placement slot 101 when the tool holder 10 is inverted, in any embodiment of this application, such as Figure 3 As shown, the multi-head screwdriver also includes a magnetic attractor 30, which is implemented as a sheet-shaped first magnet. The magnetic attractor 30 is fixedly connected to the protrusion 1011, and the fixing method includes, but is not limited to, bonding with metal adhesive. The bit 20 is made of magnetic metal. When the bit 20 is placed in the placement groove 101, the bit 20 is attracted by the magnetic attractor 30, avoiding the technical problem of the bit 20 detaching from the placement groove 101 when the handle 10 is inverted.
[0040] Additionally, in any embodiment of this application, such as Figure 3 As shown, the sidewall of the placement groove 101 has a hardness coating 1012, and the hardness of the sidewall of the placement groove 101 is greater than that of the sleeve 202. Thus, wear on the sidewall of the placement groove 101 is effectively avoided during the process of the bit 20 being placed in the placement groove 101 and taken out of the placement groove 101.
[0041] It should be noted that the first transverse groove 203 and the second transverse groove 204 are positioned so that the first transverse groove 203 is directly opposite the second transverse groove 204 when the sleeve 202 rotates circumferentially relative to the rod 201; furthermore, to prevent the first transverse groove 203 and the second transverse groove 204 from not being directly opposite the protrusion 1011 when the bit 20 is placed in the placement slot 101, such as Figure 2 and Figure 4 As shown, one cross-section of the placement groove 101 is hexagonal, and the five sides of the hexagon are of equal length. The length of the remaining side is greater than the length of any of the other five sides. By making the placement groove 101 irregularly shaped, the bit 20 can only be placed into the placement groove 101 at the corresponding angle. When the bit 20 is placed into the placement groove 101, the protrusion 1011 extends into the first horizontal groove 203 and the second horizontal groove 204 on the sleeve 202, and the sidewall of the protrusion 1011 fits against the sidewall of the first horizontal groove 203 and the second horizontal groove 204.
[0042] Furthermore, in any embodiment of this application, in order to facilitate the operator's grip on the knife handle 10, the outer wall of the knife handle 10 is covered with a rubber layer 103. It should be emphasized that the rubber layer 103 is insulating, and the material of the rubber layer 103 includes, but is not limited to, butyl rubber.
[0043] Furthermore, in any embodiment of this application, such as Figure 1 As shown, the multi-head screwdriver also includes a turntable 40, which is rotatably mounted on the end of the handle 10 away from the bit 20 and blocks the opening of the inner cavity 102. The turntable 40 has a hole 402. When the turntable 40 rotates a predetermined angle, the hole 402 is directly opposite the inner cavity 102 or the hole 402 is misaligned with the inner cavity 102.
[0044] It should be noted that, under normal circumstances, the hole 402 and the inner cavity 102 are misaligned, so that the opening of each inner cavity 102 is in a closed state. When it is necessary to replace the bit 20, the turntable 40 is rotated by a predetermined angle and the hole 402 is aligned with the inner cavity 102 to facilitate the removal or insertion of the bit 20.
[0045] Furthermore, in any embodiment of this application, to achieve a misaligned arrangement between the hole 402 and the inner cavity 102 under normal conditions, such as... Figure 1 As shown, a second magnet 401 is embedded on the turntable 40, and a third magnet 104 is embedded at the end of the handle 10 away from the bit 20. When the second magnet 401 and the third magnet 104 are attracted, the hole 402 and the inner cavity 102 are misaligned.
[0046] Furthermore, in any embodiment of this application, to achieve the rotational mounting of the turntable 40 on the tool holder 10, such as... Figure 1 As shown, the turntable 40 has a central hole 403, and the multi-head screwdriver also includes a screw 50, which passes through the central hole 403 and is threadedly connected to the turntable 40.
[0047] Furthermore, in the first embodiment of this application, in order to achieve a protrusion 1011 fixed to the handle 10 at the bottom of the placement groove 101, the protrusion 1011 and the handle 10 are integrally injection molded.
[0048] It should be noted that since the protrusion 1011 is made of plastic, its strength is suitable for general household use.
[0049] Furthermore, in the second embodiment of this application, to achieve a protrusion 1011 at the bottom of the placement groove 101 that is fixed to the knife handle 10, as follows: Figure 6As shown, the knife handle 10 has an insertion hole 105 on one end side wall near the placement groove 101, and the protrusion 1011 is a strip of metal that extends into the insertion hole 105.
[0050] In addition, in the second embodiment, to achieve the fixing of the strip metal component, such as... Figure 6 As shown, one end of the opening of the insertion hole 105 has an internal thread, and the multi-head screwdriver also includes a pressing member 1051. The pressing member 1051 is connected to the internal thread at the opening of the insertion hole 105 by a threaded connection, and one end of the pressing member 1051 abuts against one end of the strip metal piece.
[0051] It should be noted that in the second embodiment, the overall strength of the strip metal part is higher than that of the protrusion 1011 obtained by injection molding in the first embodiment, making it more suitable for industrial applications.
[0052] In summary, the multi-head screwdriver described in the embodiments of this application is explained, which provides advantages such as a simpler structure and, to a certain extent, solves the problem of loosening between the handle and the slot when the handle is worn out.
[0053] It is worth mentioning that, in this embodiment, the multi-head screwdriver has a simple structure, does not involve complex manufacturing processes or expensive materials, and is highly economical. At the same time, for manufacturers, the multi-head screwdriver provided in this application is easy to produce and inexpensive, which is more conducive to controlling production costs and further facilitates product promotion and use.
[0054] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.
Claims
1. A multi-head screwdriver, characterized in that: The multi-head screwdriver includes The knife handle has a placement groove and several internal cavities. The bottom of the placement groove has a protrusion fixed to the knife handle, and the sidewall of the placement groove has a hard coating. A plurality of bit tools are provided, one bit tool being disposed in the placement slot, and each of the inner cavities is provided with one bit tool. Each bit tool tool includes a rod body and a plurality of sleeves. The two ends of the rod body are respectively provided with a fitting portion and an external thread. Each sleeve is disposed at the end of the rod body away from the fitting portion and is threadedly connected to the rod body. The end of the rod body away from the fitting portion also has a through first transverse groove. Each sleeve has a through second transverse groove, the second transverse groove being directly opposite the first transverse groove. The protrusion passes through both the first transverse groove and the second transverse groove on one of the sleeves. A magnetic suction component is fixedly connected to the protrusion, and the bit is made of magnetic metal.
2. The multi-head screwdriver according to claim 1, characterized in that: The placement groove has a hexagonal cross-section, with five sides of equal length and the remaining side having a length greater than any of the other five sides.
3. The multi-head screwdriver according to claim 2, characterized in that: The outer wall of the handle is covered with a rubber layer.
4. The multi-head screwdriver according to claim 3, characterized in that: The multi-head screwdriver also includes a turntable, which is rotatably mounted on the end of the handle away from the bit and blocks the opening of the inner cavity. The turntable has a hole, and when the turntable rotates a predetermined angle, the hole is directly opposite the inner cavity or the hole is misaligned with the inner cavity.
5. The multi-head screwdriver according to claim 4, characterized in that: The turntable is embedded with a second magnet, and the end of the shank opposite the bit is embedded with a third magnet. When the second magnet and the third magnet are attracted to each other, the hole and the inner cavity are misaligned.
6. The multi-head screwdriver according to claim 5, characterized in that: The turntable has a central hole, and the multi-head screwdriver also includes a screw that passes through the central hole and is threadedly connected to the turntable.
7. The multi-head screwdriver according to any one of claims 1-6, characterized in that: The protrusion is integrally injection molded with the handle.
8. The multi-head screwdriver according to any one of claims 1-6, characterized in that: The handle has an insertion hole on one side wall near the placement slot, and the protrusion is a strip of metal that extends into the insertion hole.
9. The multi-head screwdriver according to claim 8, characterized in that: The socket has an internal thread at one end, and the multi-head screwdriver also includes a pressing member. The pressing member is connected to the internal thread at the socket opening by a threaded connection, and one end of the pressing member abuts against one end of the strip metal piece.