Tool bit assembly of screwdriver and screwdriver

Abstract

The utility model provides a screwdriver head assembly and a screwdriver, the screwdriver head assembly comprises a screwdriver rod, the first end of the screwdriver rod can be inserted and matched with a groove of a screw, and the second end of the screwdriver rod can be connected with a screwdriver handle; the limiting piece comprises a floating block arranged on the cutter bar in a floating and sleeving mode, a limiting plate arranged on the side, facing the first end of the cutter bar, of the floating block, and a connecting rod connecting the floating block and the limiting plate. The stop piece is fixedly arranged on the cutter bar; the elastic piece is located between the stop piece and the floating block, and the elastic piece applies force towards the second end of the cutter bar to the floating block; wherein the floating block floats to enable the limiting plate to have a limiting state and an avoiding state, and when the limiting plate is in the limiting state, the limiting plate abuts against and is matched with the head of the screw at the first end of the cutter bar under the action of the elastic force of the elastic piece. According to the technical scheme, the problem that in the prior art, the tip end of a screw is prone to slipping on the surface of an object, and the safety is poor when a screwdriver is used is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of operating tools, in particular to a screwdriver bit assembly and a screwdriver. Background Art

[0002] As an operating tool, a screwdriver can be used to screw a screw into or out of an object. The screwdriver bar can be inserted into the screw slot and drive the screw to rotate, so as to screw the screw in and out.

[0003] However, in actual use, when the screw starts to be screwed into an object, the tip of the screw tends to slip on the surface of the object, causing the axis of the screw to deviate from the axis of the screwdriver's shank during rotation, which can easily cause the screw to deviate when entering the object or cause the screw to fall off the shank.

[0004] Thus, when using a screwdriver to tighten a screw, the operator is usually required to hold the screw with one hand and the screwdriver with the other hand. However, when the screw slips on the surface of an object, the sudden deflection of the screw can easily cause the tip of the screw to pierce the operator, making the use of the screwdriver less safe. Utility Model Content

[0005] The main purpose of the utility model is to provide a screwdriver bit assembly and a screwdriver, so as to solve the problem in the related art that the tip of the screw is easy to slip on the surface of an object, resulting in poor safety when the screwdriver is used.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a screwdriver bit assembly is provided, comprising: a tool rod, a first end of the tool rod can be plugged into and matched with a groove of a screw, and a second end of the tool rod can be connected to a tool handle; a limiting member, comprising a floating block floatably mounted on the tool rod, a limiting plate arranged on a side of the floating block facing the first end of the tool rod, and a connecting rod connecting the floating block and the limiting plate; a stopper fixedly arranged on the tool rod; an elastic member located between the stopper and the floating block, the elastic member applying a force toward the second end of the tool rod to the floating block; wherein the floating block floats to allow the limiting plate to have a limiting state and an avoidance state, and when the limiting plate is in the limiting state, the limiting plate abuts and cooperates with the head of the screw on the first end of the tool rod under the action of the elastic force of the elastic member; when the limiting plate is in the avoidance state, there is an avoidance gap between the limiting plate and the first end of the tool rod to avoid the screw from moving out.

[0007] Furthermore, the limiting plate is an annular plate, and an avoidance gap connected to the inner hole of the annular plate is provided on the annular plate; when the limiting plate is in a limiting state, the rod of the screw is located in the inner hole of the annular plate, and the head of the screw is clamped between the first end of the knife rod and the annular plate; when the limiting plate is in an avoidance state, the rod of the screw can be moved out of the avoidance gap.

[0008] Further, the diameter of the inner hole of the annular plate is smaller than the maximum diameter of the first end of the knife rod.

[0009] Furthermore, the distance between the two side walls of the avoidance gap gradually increases along the direction from the axis of the knife rod to the axis of the knife rod.

[0010] Furthermore, the limiting member also includes a guide block movably sleeved on the knife rod, and the guide block is fixedly connected to the connecting rod.

[0011] Furthermore, the elastic member is a first spring, the first spring is located on the side of the second end of the stopper toward the knife rod, the first end of the first spring is connected to the stopper, and the second end of the first spring applies a force to the floating block in a direction away from the stopper.

[0012] Furthermore, the limiting member also includes a guide block movably sleeved on the knife rod, the guide block is fixedly connected to the connecting rod and is located on a side of the stopper away from the first spring.

[0013] Furthermore, the elastic member is a second spring, the second spring is located on the side of the first end of the stopper toward the knife rod, the first end of the second spring is connected to the stopper, and the second end of the second spring applies a force toward the stopper to the floating block.

[0014] Furthermore, the limiting member also includes a guide block movably sleeved on the knife rod, the guide block is fixedly connected to the connecting rod and is located on a side of the stopper away from the second spring.

[0015] According to another aspect of the utility model, a screwdriver is provided, comprising a handle and a bit assembly arranged on the handle, wherein the bit assembly is the bit assembly of the above-mentioned screwdriver.

[0016] By applying the technical solution of the utility model, the tool head assembly of the screwdriver includes: a tool rod, a limiter, a stopper and an elastic member. The first end of the tool rod can be plugged into the groove of the screw, and the second end of the tool rod can be connected to the tool handle. The limiter includes a floating block that can be floated on the tool rod, a limiter plate arranged on the side of the floating block facing the first end of the tool rod, and a connecting rod connecting the floating block and the limiter plate. The stopper is fixedly arranged on the tool rod. The elastic member is located between the stopper and the floating block, and the elastic member applies a force toward the second end of the tool rod to the floating block. In this way, the screw is installed on the first end of the tool rod, and the head of the screw is limited between the first end of the tool rod and the limiter plate. The setting of the elastic member enables the floating block, the connecting rod and the limiter plate to float, so as to facilitate the head of the screw to enter and exit between the first end of the tool rod and the limiter plate. And the elastic member can apply force to the floating block, so that the floating block, the connecting rod and the limiting plate can all be subjected to the force toward the second end of the knife rod, so that the limiting plate can apply force toward the second end of the knife rod to the screw to limit the screw on the knife rod. Wherein, the floating block floats so that the limiting plate has a limiting state and an avoidance state. When the limiting plate is in the limiting state, the limiting plate abuts and cooperates with the head of the screw on the first end of the knife rod under the action of the elastic force of the elastic member. In this way, through the abutment and cooperation between the limiting plate and the head of the screw, the screw can be limited on the first end of the knife rod, so that the axis of the screw can be on the same line as the axis of the knife rod when rotating, avoiding the tip of the screw from slipping on the surface of the object, so that the screw can be screwed in or out of the object more conveniently and quickly. In addition, the limiting member can limit the screw, avoiding the situation where the operator holds the screw with his hand, and improving the safety of the screwdriver when using it. When the limiting plate is in the avoidance state, there is an avoidance gap between the limiting plate and the first end of the knife rod to avoid the screw from moving out. The setting of the avoidance gap facilitates the screw to be moved out from between the first end of the shank and the limit plate. Therefore, the technical solution of the present application effectively solves the problem in the related art that the tip of the screw easily slips on the surface of the object, making the screwdriver less safe when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a screwdriver bit assembly according to the first embodiment of the utility model is shown;

[0019] Figure 2 Shows Figure 1 A schematic diagram of the three-dimensional structure of the screwdriver bit assembly from another perspective;

[0020] Figure 3A three-dimensional structural schematic diagram of a screwdriver bit assembly according to the second embodiment of the utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Knife bar;

[0023] 21. floating block; 22. limiting plate; 221. avoidance gap; 23. connecting rod; 24. guide block;

[0024] 30. Stopper;

[0025] 41. First spring; 42. Second spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0029] By applying the technical solution of the utility model, the tool head assembly of the screwdriver includes: a tool bar 10, a limiting member, a stopper 30 and an elastic member. The first end of the tool bar 10 can be plugged into the groove of the screw, and the second end of the tool bar 10 can be connected to the handle. The limiting member includes a floating block 21 which is floatingly sleeved on the tool bar 10, a limiting plate 22 which is arranged on the side of the floating block 21 facing the first end of the tool bar 10, and a connecting rod 23 connecting the floating block 21 and the limiting plate 22. The stopper 30 is fixedly arranged on the tool bar 10. The elastic member is located between the stopper 30 and the floating block 21, and the elastic member applies a force to the floating block 21 toward the second end of the tool bar 10. Among them, the floating block 21 floats so that the limiting plate 22 has a limiting state and an avoidance state. When the limiting plate 22 is in the limiting state, the limiting plate 22 abuts and cooperates with the head of the screw on the first end of the tool bar 10 under the action of the elastic force of the elastic member. When the limiting plate 22 is in the avoidance state, there is an avoidance gap between the limiting plate 22 and the first end of the knife rod 10 to allow the screw to move out.

[0030] In this way, the screw is installed on the first end of the tool rod 10, and the head of the screw is limited between the first end of the tool rod 10 and the limit plate 22. The setting of the elastic member allows the floating block 21, the connecting rod 23 and the limit plate 22 to float, so that the head of the screw can move in and out between the first end of the tool rod 10 and the limit plate 22. And the elastic member can apply force to the floating block 21, so that the floating block 21, the connecting rod 23 and the limit plate 22 can all be subjected to the force toward the second end of the tool rod 10, so that the limit plate 22 can apply force toward the second end of the tool rod 10 to the screw to limit the screw on the tool rod 10. Among them, the floating block 21 floats so that the limit plate 22 has a limit state and an avoidance state. When the limit plate 22 is in the limit state, the limit plate 22 abuts and cooperates with the head of the screw on the first end of the tool rod 10 under the action of the elastic force of the elastic member. In this way, the screw can be limited on the first end of the arbor 10 by the abutment between the limiting plate 22 and the head of the screw, so that the axis of the screw can be on the same line as the axis of the arbor 10 when rotating, avoiding the tip of the screw from slipping on the surface of the object, so that the screw can be screwed in or out of the object more conveniently and quickly. In addition, the limiting member can limit the screw, avoiding the situation where the operator holds the screw by hand, and improving the safety of the screwdriver when using it. When the limiting plate 22 is in the avoidance state, there is an avoidance gap between the limiting plate 22 and the first end of the arbor 10 to avoid the screw from moving out. The setting of the avoidance gap facilitates the screw to move out from between the first end of the arbor 10 and the limiting plate 22. Therefore, the technical solution of the present application effectively solves the problem in the related art that the tip of the screw is easy to slip on the surface of the object, resulting in poor safety when using the screwdriver.

[0031] Furthermore, the contact area between the limiting plate 22 and the head of the screw is relatively large, so that the limiting member is more stable and reliable in limiting the head of the screw, so that the axis of the screw can be kept on the same line with the axis of the arbor 10 when rotating.

[0032] Furthermore, by applying a force toward the second end of the shank 10 to the floating block 21, the elastic member is compressed, so that the first end of the shank 10 can protrude from the stop plate 22, and the shank 10 can be used as a conventional screwdriver. In this way, since the stop plate 22 has a certain thickness, after the screw is screwed into the object and removed from the avoidance gap, there is a gap between the screw and the surface of the object. At this time, the first end of the shank 10 protruding from the stop plate 22 can be used to tighten the screw, so that the screw is more firmly fixed on the object.

[0033] In the first embodiment, Figure 1 and Figure 2 As shown, the limiting plate 22 is an annular plate, and an avoidance notch 221 connected to the inner hole of the annular plate is provided on the annular plate. The structures of the annular plate and the avoidance notch 221 are simple, which is convenient for processing the limiting plate 22. When the limiting plate 22 is in the limiting state, the rod of the screw is located in the inner hole of the annular plate, and the head of the screw is clamped between the first end of the arbor 10 and the annular plate. The inner hole of the annular plate is convenient for accommodating the rod of the screw, and the side of the head of the screw provided with a slot cooperates with the first end of the arbor 10, and the surface of the head of the screw facing the rod of the screw abuts and cooperates with the surface of the annular plate facing the second end of the arbor 10. When the limiting plate 22 is in the avoidance state, the rod of the screw can be moved out of the avoidance notch 221. The setting of the avoidance notch 221 facilitates the separation of the screw and the cutter head assembly, and also facilitates the screw to enter the annular plate from the avoidance notch 221.

[0034] In the first embodiment, Figure 1 and Figure 2 As shown, the diameter of the inner hole of the annular plate is smaller than the maximum diameter of the first end of the knife rod 10. In this way, when the cutter head assembly is not engaged with the screw, the inner hole of the arc plate can abut against the side wall of the knife rod 10, so that the limit plate 22 can be kept at the first end of the knife rod 10, which is convenient for subsequent use.

[0035] In the first embodiment, Figure 1 and Figure 2 As shown, the distance between the two side walls of the avoidance notch 221 gradually increases from the direction close to the axis of the shank 10 to the direction away from the axis of the shank 10. This facilitates the screw to enter the annular plate from the avoidance notch 221, and plays a guiding role when the screw enters. In addition, the distance between the two side walls of the avoidance notch 221 close to the axis of the shank 10 is smaller, which can reduce the possibility of the screw coming out of the avoidance notch 221 when rotating, and further improve the safety of the screwdriver when in use.

[0036] In the first embodiment, Figure 1 and Figure 2 As shown, the limiter also includes a guide block 24 movably mounted on the knife bar 10, and the guide block 24 is fixedly connected to the connecting rod 23. The setting of the guide block 24 makes the floating of the limiter on the knife bar 10 more stable and reliable, reducing the possibility of the limiter plate 22 being deflected when floating.

[0037] In the first embodiment, Figure 1 and Figure 2 As shown, the elastic member is a first spring 41, and the first spring 41 is located on the side of the second end of the stopper 30 toward the shank 10. The first end of the first spring 41 is connected to the stopper 30, and the second end of the first spring 41 applies a force in a direction away from the stopper 30 to the floating block 21. In this way, the first spring 41 is simply arranged on the shank 10 and is easy to install. Since the stopper 30 is fixedly arranged on the shank 10, the first end of the first spring 41 can abut against the stopper 30, and the second end of the first spring 41 applies a force to the floating block 21, so that the floating block 21 can apply a force in a direction away from the stopper 30 to the limit plate 22, so that the limit plate 22 can apply a second end force toward the shank 10 to the head of the screw.

[0038] In the first embodiment, Figure 1 and Figure 2 As shown, the limiter also includes a guide block 24 movably sleeved on the knife bar 10, the guide block 24 is fixedly connected to the connecting rod 23 and is located on the side of the stopper 30 away from the first spring 41. The setting of the guide block 24 makes the floating of the limiter on the knife bar 10 more stable and reliable, reduces the possibility of the limiter plate 22 deflecting when floating, and also improves the structural strength of the limiter. In addition, the structure of the limiter is simple.

[0039] In the second embodiment, Figure 3 As shown, the difference between the second embodiment and the first embodiment lies in the setting position of the elastic member. The elastic member is a second spring 42, and the second spring 42 is located on the side of the first end of the stopper 30 facing the arbor 10. The first end of the second spring 42 is connected to the stopper 30, and the second end of the second spring 42 applies a force in the direction of the stopper 30 to the floating block 21. In this way, the second spring 42 is simply arranged on the arbor 10 and is easy to install. Since the stopper 30 is fixedly arranged on the arbor 10, the first end of the second spring 42 can abut against the stopper 30, and the second end of the second spring 42 applies a force to the floating block 21, so that the floating block 21 can apply a force in the direction of the stopper 30 to the limit plate 22, so that the limit plate 22 can apply a second end force in the direction of the arbor 10 to the head of the screw.

[0040] In the second embodiment, Figure 3As shown, the difference between the second embodiment and the first embodiment lies in the setting position of the guide block 24. The limiter also includes a guide block 24 movably sleeved on the knife bar 10, the guide block 24 is fixedly connected to the connecting rod 23 and is located on the side of the stopper 30 away from the second spring 42. The setting of the guide block 24 makes the floating of the limiter on the knife bar 10 more stable and reliable, reduces the possibility of the limiter plate 22 being deflected when floating, and also improves the structural strength of the limiter. In addition, the structure of the limiter is simple.

[0041] The present application also provides a screwdriver, which includes a handle and a bit assembly disposed on the handle, and the bit assembly is the bit assembly of the screwdriver described above. Since the bit assembly of the screwdriver described above can solve the problem in the related art that the tip of the screw easily slips on the surface of an object, resulting in poor safety when the screwdriver is used, the screwdriver having the bit assembly can solve the same technical problem.

[0042] In this embodiment, the screwdriver is an electric screwdriver, and the cutter head assembly is rotatably arranged on the handle. In other embodiments, the screwdriver is a manual screwdriver, and the cutter head assembly is fixedly arranged on the handle.

[0043] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A screwdriver bit assembly, characterized in that: include: A knife rod (10), wherein the first end of the knife rod (10) can be plugged into the groove of the screw, and the second end of the knife rod (10) can be connected to the knife handle; A limiting member, comprising a floating block (21) which is floatably sleeved on the knife rod (10), a limiting plate (22) which is arranged on one side of the floating block (21) facing the first end of the knife rod (10), and a connecting rod (23) which connects the floating block (21) and the limiting plate (22); A stopper (30) fixedly arranged on the knife rod (10); an elastic member, located between the stopper (30) and the floating block (21), the elastic member applying a force toward the second end of the knife rod (10) to the floating block (21); The floating block (21) floats so that the limit plate (22) has a limit state and an avoidance state. When the limit plate (22) is in the limit state, the limit plate (22) abuts against the head of the screw on the first end of the knife rod (10) under the action of the elastic force of the elastic member; when the limit plate (22) is in the avoidance state, there is an avoidance gap between the limit plate (22) and the first end of the knife rod (10) to avoid the screw from moving out.

2. The screwdriver bit assembly according to claim 1, characterized in that: The limiting plate (22) is an annular plate, and an avoidance notch (221) connected to the inner hole of the annular plate is provided on the annular plate; when the limiting plate (22) is in the limiting state, the rod of the screw is located in the inner hole of the annular plate, and the head of the screw is clamped between the first end of the knife rod (10) and the annular plate; when the limiting plate (22) is in the avoidance state, the rod of the screw can be moved out of the avoidance notch (221).

3. The screwdriver bit assembly according to claim 2, characterized in that: The diameter of the inner hole of the annular plate is smaller than the maximum diameter of the first end of the knife rod (10).

4. The screwdriver bit assembly according to claim 2, characterized in that: The distance between the two side walls of the avoidance gap (221) gradually increases along a direction from close to the axis of the knife rod (10) to far away from the axis of the knife rod (10).

5. The screwdriver bit assembly according to claim 1, characterized in that: The limiting member also includes a guide block (24) movably sleeved on the knife rod (10), and the guide block (24) is fixedly connected to the connecting rod (23).

6. The screwdriver bit assembly according to claim 1, characterized in that: The elastic member is a first spring (41), and the first spring (41) is located on the side of the second end of the stopper (30) facing the knife rod (10). The first end of the first spring (41) is connected to the stopper (30), and the second end of the first spring (41) applies a force to the floating block (21) in a direction away from the stopper (30).

7. The screwdriver bit assembly according to claim 6, characterized in that: The limiting member also includes a guide block (24) movably sleeved on the knife rod (10), wherein the guide block (24) is fixedly connected to the connecting rod (23) and is located on a side of the stopper (30) away from the first spring (41).

8. The screwdriver bit assembly according to claim 1, characterized in that: The elastic member is a second spring (42), and the second spring (42) is located on the side of the first end of the stop member (30) facing the knife rod (10), the first end of the second spring (42) is connected to the stop member (30), and the second end of the second spring (42) applies a force to the floating block (21) in the direction of the stop member (30).

9. The screwdriver bit assembly according to claim 8, characterized in that: The limiting member also includes a guide block (24) movably sleeved on the knife rod (10), wherein the guide block (24) is fixedly connected to the connecting rod (23) and is located on a side of the stopper (30) away from the second spring (42).

10. A screwdriver, comprising a handle and a bit assembly arranged on the handle, characterized in that: The tool head assembly is a tool head assembly of a screwdriver according to any one of claims 1 to 9.

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