Screwdriver

Abstract

The present invention relates to the field of mechanical manufacturing technology, and discloses a screwdriver, comprising a housing, a transmission assembly, a bit assembly and a pushing assembly. The driving wheel and the driven wheel of the transmission assembly are both arranged in the installation cavity of the housing, and the rotation center hole of the driving wheel corresponds to the first rotation hole of the housing. The installation section of the screw bit of the bit assembly is located in the installation cavity, and the rotation section of the screw bit passes through the rotation center hole of the driven wheel and the second rotation hole of the housing and extends out of the installation cavity. The elastic member of the bit assembly is clamped between the driven wheel and the installation section, and the elastic member enables the screw bit to always have a tendency to move away from the driven wheel in the first direction. The installation section is provided with a first pushing protrusion, and the first pushing protrusion has a first inclined surface. The pushing member of the pushing assembly is partially inserted in the installation cavity, and the second pushing protrusion of the pushing member has a second inclined surface, and the first inclined surface abuts against the second inclined surface, and the pushing member moves along the second direction to press the first pushing protrusion and drive the screw bit to move along the first direction.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing, and in particular to a screw driver. Background Art

[0002] A screwdriver is a tool used to tighten or loosen screws. Depending on the type of screw being screwed, screwdrivers also have many specifications and models, and common structures of screwdrivers include combined type, electric type and ratchet type. Regardless of the form of the screwdriver, its structure includes three parts: a handle, a toggle lever and a screwdriver bit. It uses the working principle of the wheel axle to hold it in the horizontal direction and rotate it clockwise or counterclockwise in the vertical direction to tighten it. However, on some equipment or workpieces that need to be assembled, there are screws located in extremely small spaces. When they need to be tightened, due to spatial interference, conventional screwdrivers cannot reach into the small space where they are located to tighten them, which seriously affects work efficiency.

[0003] Therefore, a screw driver is urgently needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a screw driver, which can solve the problem that conventional screw drivers cannot extend into a very narrow space and screw the screws, and can improve the efficiency of screw tightening or disassembling.

[0005] As conceived above, the technical solution adopted by the present invention is:

[0006] Provided is a screw driver, comprising:

[0007] A housing having a mounting cavity, wherein a first rotation hole and a second rotation hole are arranged on the housing;

[0008] A transmission assembly, comprising a driving wheel and a driven wheel in transmission connection, wherein the driving wheel and the driven wheel are both arranged in the mounting cavity, and a rotation center hole of the driving wheel corresponds to the first rotation hole;

[0009] A screwdriver bit assembly, comprising a screwdriver bit and an elastic member, wherein the mounting section of the screwdriver bit is located in the mounting cavity, the rotating section of the screwdriver bit passes through the rotating center hole of the driven wheel and the second rotating hole and extends out of the mounting cavity, the elastic member is clamped between the driven wheel and the mounting section, the elastic member is used to make the screwdriver bit always have a tendency to move away from the driven wheel in a first direction, a first pushing protrusion is arranged on the mounting section, and the first pushing protrusion has a first inclined surface on a side away from the driven wheel;

[0010] The pushing component includes a pushing member, a part of the pushing member is inserted into the installation cavity, the pushing member extends to one end of the driven wheel and is provided with a second pushing protrusion, the side of the second pushing protrusion facing the driven wheel has a second inclined surface, the first inclined surface abuts against the second inclined surface, the pushing member can move along the second direction to press against the first pushing protrusion and drive the screwdriver bit to move along the first direction, the first direction is perpendicular to the second direction.

[0011] Optionally, the screwdriver bit includes a bit seat and a plurality of bits, the bit seat is arranged in the installation cavity, and each bit can pass through the second rotation hole and the rotation center hole of the driven wheel and is fixed to the bit seat.

[0012] Optionally, a pushing groove is arranged on the pushing member, the pushing groove extends along the second direction, and the installation section is inserted into the pushing groove.

[0013] Optionally, two sets of the first pushing protrusions and the second pushing protrusions are arranged, the two sets of the first pushing protrusions are oppositely arranged on both sides of the installation section along the third direction, the two sets of the second pushing protrusions are oppositely arranged on both sides of the pushing groove along the third direction, one first pushing protrusion abuts against one second pushing protrusion, and the third direction is perpendicular to both the first direction and the second direction.

[0014] Optionally, a limiting groove is further arranged on the housing, the pushing component further includes a toggling member, the toggling member is arranged on the pushing member and passes through the limiting groove, the toggling member can move along the first direction, when the toggling member is in the first position in the first direction, the toggling member can move in the limiting groove along with the pushing member, and when the toggling member is in the second position in the first direction, the toggling member can be fixed to the housing.

[0015] Optionally, a fixing groove is further arranged on the housing, a fixing protrusion is arranged on the toggling member, when the toggling member is in the first position in the first direction, the fixing protrusion is located outside the fixing groove, and when the toggling member is in the second position in the first direction, the fixing protrusion is inserted into the fixing groove.

[0016] Optionally, two sets of the fixing protrusions and the fixing grooves are arranged, the two sets of the fixing protrusions are oppositely arranged on both sides of the toggling member along the third direction, the two sets of the fixing grooves are oppositely arranged on both sides of the limiting groove along the third direction, and each set of the fixing grooves includes a plurality of the fixing grooves arranged at intervals along the second direction, and the third direction is perpendicular to both the first direction and the second direction.

[0017] Optionally, the shell includes a mounting portion and a connecting portion connected to each other, the mounting portion has the mounting cavity, the limiting groove is arranged on the connecting portion, a part of the pushing member extends into the mounting cavity, and the other part of the pushing member is provided with the toggle member and is passed through the cavity of the connecting portion, so that the toggle member is passed through the limiting groove.

[0018] Optionally, the transmission assembly also includes a toothed belt, which is sleeved on the outer circumference of the driving wheel and the driven wheel, a first transmission tooth is set on the outer circumference of the driving wheel, and a second transmission tooth is set on the outer circumference of the driven wheel, and the first transmission tooth and the second transmission tooth are both engaged with the toothed belt.

[0019] Optionally, the screw driver further comprises a rotating member, one end of which can pass through the first rotating hole and be inserted into the rotating center hole of the driving wheel, and the rotating member is used to drive the driving wheel to rotate.

[0020] The beneficial effects of the present invention are:

[0021] The screwdriver proposed by the present invention includes a housing, a transmission assembly, a bit assembly and a pushing assembly. The housing has a mounting cavity, and a first rotating hole and a second rotating hole are arranged on the housing. The transmission assembly includes a driving wheel and a driven wheel connected in transmission, and both the driving wheel and the driven wheel are arranged in the mounting cavity, and the rotating center hole of the driving wheel corresponds to the first rotating hole. The bit assembly includes a screw bit and an elastic member, the mounting section of the screw bit is located in the mounting cavity, and the rotating section of the screw bit passes through the rotating center hole of the driven wheel and the second rotating hole and extends out of the mounting cavity, and the elastic member is clamped between the driven wheel and the mounting section, and the elastic member is used to make the screw bit always have a tendency to move toward the side away from the driven wheel in the first direction, and a first pushing protrusion is arranged on the mounting section, and the first pushing protrusion has a first inclined surface on the side away from the driven wheel. The pushing assembly includes a pushing member, which is partially inserted into the installation cavity. The pushing member extends to one end of the driven wheel and is provided with a second pushing protrusion. The second pushing protrusion has a second inclined surface on the side facing the driven wheel, and the first inclined surface abuts against the second inclined surface. The pushing member can move along the second direction to press the first pushing protrusion and drive the screwdriver bit to move along the first direction, and the first direction is perpendicular to the second direction.

[0022] In specific implementation, since the rotating section of the screwdriver bit is inserted through the rotating center hole of the driven wheel and can rotate synchronously with the driven wheel, the rotating section of the screwdriver bit that has passed through the rotating center hole of the driven wheel is inserted into the head of the screw to be screwed, and the driving wheel can be driven to rotate, thereby driving the driven wheel connected to the driving wheel to rotate at the same time. The driving wheel can be driven to rotate by a conventional rotating rod, screwdriver, etc. that passes through the first rotating hole and is inserted into the rotating center hole of the driving wheel. If the operating space is an extremely narrow area, the setting of the elastic member allows the screwdriver bit to partially retreat into the installation cavity, preventing the screwdriver bit from being bumped when it is inserted into the operating space, thereby reducing the difficulty of the screwdriver inserting into the operating space. When the screwdriver is in place, that is, the screwdriver bit corresponds to the head of the screw to be screwed in the first direction, the staff can drive the pusher to move in the second direction to utilize the pressure of the first inclined surface and the second inclined surface, and change the contact position of the pusher and the screwdriver bit, that is, as the distance between the contact point of the second inclined surface and the driven wheel in the first direction gradually decreases, the screwdriver bit is continuously moved toward the side of the driven wheel in the first direction, that is, the part of the screwdriver bit extending out of the installation cavity becomes more, so that the rotating part of the screwdriver bit can be more inserted into the head of the screw to be screwed, so as to ensure the effective driving of the screwdriver bit on the screw to be screwed. The screwdriver proposed by the present invention can solve the problem that conventional screwdrivers cannot extend into extremely narrow spaces and screw screws, and can improve the efficiency of screw tightening or disassembling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a screw driver provided by an embodiment of the present invention;

[0024] Figure 2 It is a partial structural exploded schematic diagram of a screw driver provided by an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the assembly of a part of the housing, the transmission assembly and the pushing assembly provided in an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of the use state of the screw driver provided by the embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of a first screwdriver bit provided by an embodiment of the present invention;

[0028] Figure 6 is a structural schematic diagram of a second screwdriver bit provided by an embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of a third screwdriver bit provided by an embodiment of the present invention;

[0030] Figure 8 It is a schematic structural diagram of a fourth screwdriver bit provided in an embodiment of the present invention.

[0031] In the figure:

[0032] 1. Shell; 10. Mounting cavity; 11. Mounting portion; 111. First rotating hole; 12. Connecting portion; 121. Limiting groove; 122. Fixing groove; 13. Handle portion;

[0033] 2. Transmission assembly; 21. Driving wheel; 22. Driven wheel; 23. Toothed belt;

[0034] 3. bit assembly; 31. bit holder; 311. first push protrusion; 32. bit; 33. elastic member;

[0035] 4. Pushing assembly; 41. Pushing member; 411. Second pushing protrusion; 412. Pushing groove; 42. Toggle member; 421. Toggle rod; 422. Toggle head; 43. Fixed protrusion;

[0036] 5. Rotating parts. DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", and "right" are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific embodiments.

[0042] As Figures 1 to 8 shown, this embodiment provides a screwdriver, which includes a housing 1, a transmission assembly 2, a bit assembly 3, and a pushing assembly 4. The housing 1 has an installation cavity 10. A first rotation hole 111 and a second rotation hole are provided on the housing 1. The transmission assembly 2 includes a driving wheel 21 and a driven wheel 22 that are transmission-connected. Both the driving wheel 21 and the driven wheel 22 are arranged in the installation cavity 10. The rotation center hole of the driving wheel 21 corresponds to the first rotation hole 111. The bit assembly 3 includes a screw bit. The installation section of the screw bit is located in the installation cavity 10, and the rotation section of the screw bit passes through the rotation center hole of the driven wheel 22 and the second rotation hole and extends out of the installation cavity 10. On this basis, in specific implementation, since the rotation section of the screw bit passes through the rotation center hole of the driven wheel 22 and can rotate synchronously with the driven wheel 22, when the rotation section of the screw bit passing through the rotation center hole of the driven wheel 22 is inserted into the head of the screw to be screwed, the driving wheel 21 can be driven to rotate, thereby driving the driven wheel 22 transmission-connected to the driving wheel 21 to rotate simultaneously. To drive the driving wheel 21 to rotate, a conventional rotating rod, screwdriver, etc. can be used to pass through the first rotation hole 111 and insert into the rotation center hole of the driving wheel 21. Since the screwdriver is provided with the transmission assembly 2, the force application position thereof may not be located at the screw bit. Then, the staff can extend the screw bit into a narrow space and drive the screw bit to rotate outside the narrow space.

[0043] Furthermore, as Figures 2 to 4As shown, the bit assembly 3 further includes an elastic member 33. The elastic member 33 is clamped between the driven wheel 22 and the mounting section. The elastic member 33 is configured to make the screwdriver bit always tend to move in a first direction away from the driven wheel 22. A first pushing protrusion 311 is provided on the mounting section. The side of the first pushing protrusion 311 facing away from the driven wheel 22 has a first inclined surface. The pushing assembly 4 includes a pushing member 41. The pushing member 41 is partially inserted into the mounting cavity 10. One end of the pushing member 41 extending to the driven wheel 22 is provided with a second pushing protrusion 411. The side of the second pushing protrusion 411 facing the driven wheel 22 has a second inclined surface. The first inclined surface abuts against the second inclined surface. The pushing member 41 can move in a second direction to press against the first pushing protrusion 311 and drive the screwdriver bit to move in the first direction. The first direction is perpendicular to the second direction. In this embodiment, the first direction is Figure 2 the ab direction in Figure 2 and the second direction is

[0044] the cd direction in Figures 5 to 8 Specifically, during implementation, if the operating space is an extremely narrow area, the setting of the elastic member 33 enables the screwdriver bit to partially retract into the mounting cavity 10, avoiding the screwdriver bit from being knocked when extending into the operating space, thereby reducing the difficulty of the screwdriver extending into the operating space. When the screwdriver is already in place, that is, the screwdriver bit corresponds to the head of the screw to be screwed in the first direction, the worker can drive the pushing member 41 to move in the second direction towards the driven wheel 22 side, so as to utilize the abutment of the first inclined surface and the second inclined surface. By changing the abutting position between the pushing member 41 and the screwdriver bit, that is, as the distance between the abutting point of the second inclined surface and the driven wheel 22 in the first direction gradually decreases, the screwdriver bit continuously moves towards the driven wheel 22 side in the first direction, that is, the part of the screwdriver bit extending out of the mounting cavity 10 becomes more, so that the rotating part of the screwdriver bit can be inserted into the head of the screw to be screwed more, to ensure the effective driving of the screwdriver bit for the screw to be screwed. The screwdriver provided in this embodiment can solve the problem that a conventional screwdriver cannot extend into an extremely narrow space and screw a screw, and can improve the efficiency of screwing or disassembling the screw.

[0044] Optionally, as Figures 5 to 8As shown, the screwdriver bit includes a bit seat 31 and a plurality of bits 32. The bit seat 31 is disposed in the installation cavity 10. Each bit 32 can pass through the second rotation hole and the rotation center hole of the driven wheel 22 and is fixed to the bit seat 31. In this embodiment, the bit 32 and the bit seat 31 are magnetically fixed. Since a screwdriver is equipped with a plurality of bits 32, during use, the staff can install different bits 32 according to the type of the screw to be screwed. The elastic member 33 is sleeved on the outer periphery of the bit 32. To prevent the elastic member 33 from shifting and interfering with the bit 32 each time the bit 32 is magnetically fixed to the bit seat 31, a circular groove can be provided on the outer periphery of the rotation center hole of the driven wheel 22, and one end of the elastic member 33 is inserted into the circular groove to limit the elastic member 33 to a certain extent and prevent the elastic member 33 from interfering with the bit 32 in terms of position during the replacement of the bit 32.

[0045] Furthermore, as Figure 2 shown, a push groove 412 is provided on the pushing member 41. The push groove 412 extends along the second direction. The installation section, that is, the bit seat 31, is inserted into the push groove 412. Specifically, when implemented, there is a jack on the cavity wall of the installation cavity 10, and the pushing member 41 slidably passes through the jack so that a part of the pushing member 41 is located inside the installation cavity 10 and another part of the pushing member 41 is located outside the installation cavity 10. The staff applies a force to the other part of the pushing member 41 outside the installation cavity 10, and then the pushing member 41 can move inside the installation cavity 10. A push groove 412 is provided on the pushing member 41, and the installation section is inserted into the push groove 412, which can ensure that the pushing member 41 always moves along the second direction. At the same time, it can also prevent the first pushing protrusion 311 and the second pushing protrusion 411 from being misaligned during the movement of the pushing member 41, so as to ensure the assembly stability of the pushing member 41 and the screwdriver bit.

[0046] Optionally, two sets of first pushing protrusions 311 and two sets of second pushing protrusions 411 are provided. The two sets of first pushing protrusions 311 are oppositely arranged on both sides of the installation section along the third direction, and the two sets of second pushing protrusions 411 are oppositely arranged on both sides of the push groove 412 along the third direction. One first pushing protrusion 311 abuts against one second pushing protrusion 411, and the third direction is perpendicular to both the first direction and the second direction. In this embodiment, the third direction is the Figure 2 ef direction in. The first pushing protrusion 311 and the second pushing protrusion 411 are both oppositely arranged in the third direction, which can make the force applied by the pushing member 41 to the screwdriver bit in the first direction more uniform, so as to ensure that the force applied by the screwdriver bit to the screw to be screwed is more uniform.

[0047] Optionally, as Figure 2As shown, the housing 1 is also provided with a limit groove 121, and the pushing assembly 4 further includes a toggle member 42, which is provided on the pushing member 41 and penetrates in the limit groove 121, and the toggle member 42 can move along the first direction. When the toggle member 42 is located at the first position in the first direction, the toggle member 42 can move in the limit groove 121 with the pushing member 41, and when the toggle member 42 is located at the second position in the first direction, the toggle member 42 can be fixed to the housing 1. In this embodiment, the toggle member 42 includes a toggle rod 421 and a toggle head 422 connected to each other, the toggle rod 421 penetrates in the mounting hole and the limit groove 121 of the pushing member 41, and the toggle head 422 is located outside the limit groove 121. In this embodiment, a spring is provided inside the toggle rod 421, one end of the spring is connected to the toggle head 422, and the other end of the spring is connected to the bottom wall of the mounting hole, that is, the toggle member 42 is connected to the pushing member 41 through the spring. When the toggle member 42 is pulled upward, the spring is stretched, so that the toggle member 42 is in the first position, and when the toggle member 42 is not pulled upward, the spring is not stretched, so that the toggle member 42 is in the second position. When the toggle member 42 is in the second position, the toggle head 422 abuts against the outer wall of the housing 1. If the friction between the toggle head 422 and the housing 1 is large enough, the housing 1 can hinder the movement of the toggle member 42, thereby limiting the movement of the push member 41. When the toggle member 42 is in the first position, there is a gap between the toggle head 422 and the outer wall of the housing 1, and the housing 1 cannot hinder the toggle member 42 from moving with the push member 41, that is, the toggle member 42 can move with the push member 41 in the limiting groove 121. Therefore, when it is necessary to adjust the length of the screwdriver bit extending out of the mounting cavity 10, the toggle member 42 can be pulled upward to make the toggle member 42 in the first position and move the toggle head 422 along the second direction, so that the push member 41 moves along the second direction, and the screwdriver bit moves along the first direction. When the length of the screwdriver bit extending out of the mounting cavity 10 is determined, the toggle head 422 can be returned to the second position, so that the resistance between the toggle head 422 and the housing 1 is used to limit the position of the pusher 41 in the second direction, that is, the position of the screwdriver bit in the first direction, so as to ensure that the screwdriver bit does not move in the first direction when the screw is screwed with the screwdriver bit. In specific implementation, in order to increase the resistance between the toggle head 422 and the housing 1 when the two are in contact, the staff can continue to apply a downward force to the toggle head 422, that is, use an external force to press the toggle head 422 against the housing 1 to ensure that the toggle head 422 and the housing 1 are relatively fixed.

[0048] In other embodiments, the spring may not be provided inside the toggle rod 421. When no upward force is applied to the toggle rod 421, the toggle rod 421 may fall back to the second position due to gravity, so that the toggle head 422 abuts against the shell 1, thereby limiting the push member 41 from continuing to move in the second direction.

[0049] Alternatively, if Figure 2As shown, the housing 1 is further provided with a fixing groove 122, and the toggle member 42 is provided with a fixing protrusion 43, and the toggle member 42 can move along the first direction. When the toggle member 42 is located at the first position in the first direction, the fixing protrusion 43 is located outside the fixing groove 122, and the toggle member 42 can move in the limiting groove 121 along with the push member 41. When the toggle member 42 is located at the second position in the first direction, the fixing protrusion 43 is inserted into the fixing groove 122, and the toggle member 42 is fixed to the housing 1. The cooperation between the fixing protrusion 43 and the fixing groove 122 can further enhance the stability of the fixing of the toggle member 42 to the housing 1 when the toggle member 42 is located at the second position, and when the toggle member 42 is pulled upward, it is also necessary to ensure that the fixing protrusion 43 is completely separated from the fixing groove 122. In this embodiment, the fixing protrusion 43 is arranged at the connection between the toggle rod 421 and the toggle head 422, and the connection stability at the toggle rod 421 and the toggle head 422 can also be increased. In this embodiment, since the fixing protrusion 43 is connected to both the toggle rod 421 and the toggle head 422, the fixing groove 122 is connected to the limiting groove 121. In other embodiments, the fixing groove 122 and the limiting groove 121 may also be arranged at intervals, and the fixing groove 122 is only used to insert the fixing protrusion 43, and the limiting groove 121 is only used to penetrate the toggle rod 421.

[0050] Optionally, two groups of fixing protrusions 43 and fixing grooves 122 are provided, and the two groups of fixing protrusions 43 are relatively provided on both sides of the toggle member 42 along the third direction, and the two groups of fixing grooves 122 are relatively provided on both sides of the limiting groove 121 along the third direction, and each group of fixing grooves 122 includes a plurality of fixing grooves 122 spaced apart along the second direction, and the third direction is perpendicular to both the first direction and the second direction. In this embodiment, the two groups of fixing grooves 122 and the two groups of fixing protrusions 43 are relatively provided in the third direction, that is, when the fixing protrusions 43 are inserted into the fixing grooves 122, the two fixing protrusions 43 are simultaneously inserted into the two opposite fixing grooves 122, which can enhance the fixing stability of the fixing grooves 122 on the fixing protrusions 43, so as to ensure that the pusher 41 will not move when the screwdriver bit is used to turn the knob screw. Both groups of fixing grooves 122 have multiple fixing grooves 122 spaced apart along the second direction, which makes the position of the push member 41 moving along the second direction adjustable, that is, the position of the screw bit moving along the first direction adjustable. When the screw bit moves to a predetermined position, the fixing protrusion 43 can be inserted into the corresponding fixing groove 122. The distance and number of the fixing grooves 122 spaced apart along the second direction can be determined according to the distance the screw bit needs to move in the first direction.

[0051] Alternatively, if Figure 1As shown, the housing 1 includes a mounting portion 11 and a connecting portion 12 connected to each other, the mounting portion 11 has a mounting cavity 10, a limiting groove 121 is provided on the connecting portion 12, a portion of the push member 41 extends into the mounting cavity 10, and another portion of the push member 41 is provided with a toggle member 42 and penetrates the cavity of the connecting portion 12, so that the toggle member 42 penetrates the limiting groove 121 of the connecting portion 12. The mounting portion 11 and the connecting portion 12 are connected through a socket provided on the cavity wall of the mounting cavity 10, and the socket enables the push member 41 to move in the mounting cavity 10 and the cavity.

[0052] In this embodiment, Figure 1 As shown, the shell 1 also includes a handle portion 13, which is connected to the end of the connecting portion 12 away from the mounting portion 11 in the second direction. The handle portion 13 is used to extend the length of the shell 1 in the second direction to facilitate the staff to hold the screwdriver with one hand and adjust the push member 41 with the other hand.

[0053] Alternatively, if Figure 2 As shown, the transmission assembly 2 also includes a toothed belt 23, which is sleeved on the outer periphery of the driving wheel 21 and the driven wheel 22. The outer periphery of the driving wheel 21 is provided with a first transmission tooth, and the outer periphery of the driven wheel 22 is provided with a second transmission tooth, and the first transmission tooth and the second transmission tooth are both meshed with the toothed belt 23. There is no relative sliding between the toothed belt 23 and the driving wheel 21 and the driven wheel 22, the transmission ratio is constant and accurate, and the transmission efficiency is high. Compared with the meshing transmission of the pulley with transmission teeth, the toothed belt 23 has a higher degree of freedom in transmission of multiple gears, and the circumference of the toothed belt 23 can be freely selected according to the length of the mounting cavity 10 in the second direction without increasing the number of driven wheels 22. In addition, in conventional use scenarios, if the driving wheel 21 and the driven wheel 22 with the same number of teeth are used, the angular velocity 1:1 transmission can be achieved, that is, the twisting angle and torque of the driving wheel 21 can be transmitted to the driven wheel 22 in a 1:1 manner. In special usage scenarios, the gear ratios of the driving wheel 21 and the driven wheel 22 can also be flexibly matched to achieve the usage effect of "saving effort but increasing rotation angle" or "saving rotation angle but increasing effort".

[0054] Alternatively, if Figure 1 As shown, the screw driver also includes a rotating member 5, one end of which can pass through the first rotating hole 111 and be inserted into the rotating center hole of the driving wheel 21, and the rotating member 5 is used to drive the driving wheel 21 to rotate. The rotating member 5 can be a conventional rotating rod, a screwdriver, etc., and can mainly drive the driving wheel 21 to rotate.

[0055] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A screw driver, characterized in that: include: A housing (1) having a mounting cavity (10), wherein a first rotation hole (111) and a second rotation hole are provided on the housing (1); A transmission assembly (2), comprising a driving wheel (21) and a driven wheel (22) in transmission connection, the driving wheel (21) and the driven wheel (22) being both arranged in the mounting cavity (10), and a rotation center hole of the driving wheel (21) corresponding to the first rotation hole (111); A screwdriver bit assembly (3) comprises a screwdriver bit and an elastic member (33), wherein the mounting section of the screwdriver bit is located in the mounting cavity (10), the rotating section of the screwdriver bit passes through the rotating center hole of the driven wheel (22) and the second rotating hole and protrudes out of the mounting cavity (10), the elastic member (33) is sandwiched between the driven wheel (22) and the mounting section, the elastic member (33) is used to make the screwdriver bit always have a tendency to move in a first direction toward a side away from the driven wheel (22), and a first pushing protrusion (311) is provided on the mounting section, and a first inclined surface is provided on a side of the first pushing protrusion (311) away from the driven wheel (22); A pushing assembly (4), comprising a pushing member (41), wherein the pushing member (41) is partially inserted into the mounting cavity (10), and a second pushing protrusion (411) is provided at one end of the pushing member (41) extending to the driven wheel (22), and the second pushing protrusion (411) has a second inclined surface on a side facing the driven wheel (22), and the first inclined surface abuts against the second inclined surface, and the pushing member (41) can move along a second direction to abut against the first pushing protrusion (311) and drive the screwdriver bit to move along the first direction, and the first direction is perpendicular to the second direction; The screwdriver bit comprises a bit seat (31) and a plurality of bits (32); the bit seat (31) is arranged in the mounting cavity (10); each bit (32) can be inserted into the second rotating hole and the rotating center hole of the driven wheel (22) and fixed to the bit seat (31); the bit (32) and the bit seat (31) are fixed by magnetic attraction; The pushing member (41) is provided with a pushing groove (412), the pushing groove (412) extends along the second direction, and the mounting section is inserted into the pushing groove (412).

2. The screw driver according to claim 1, characterized in that: The first pushing protrusions (311) and the second pushing protrusions (411) are each provided in two groups, the two groups of the first pushing protrusions (311) are relatively provided on both sides of the mounting section along a third direction, and the two groups of the second pushing protrusions (411) are relatively provided on both sides of the pushing groove (412) along the third direction, one of the first pushing protrusions (311) abuts against one of the second pushing protrusions (411), and the third direction is perpendicular to both the first direction and the second direction.

3. The screw driver according to claim 1, characterized in that: The shell (1) is also provided with a limiting groove (121), and the pushing assembly (4) further comprises a toggle member (42), the toggle member (42) being provided on the pushing member (41) and passing through the limiting groove (121), the toggle member (42) being able to move along the first direction, and when the toggle member (42) is located at a first position in the first direction, the toggle member (42) is able to move in the limiting groove (121) along with the pushing member (41), and when the toggle member (42) is located at a second position in the first direction, the toggle member (42) is able to be fixed to the shell (1).

4. The screw driver according to claim 3, characterized in that: A fixing groove (122) is also provided on the shell (1), and a fixing protrusion (43) is provided on the toggle member (42); when the toggle member (42) is located at the first position in the first direction, the fixing protrusion (43) is located outside the fixing groove (122); when the toggle member (42) is located at the second position in the first direction, the fixing protrusion (43) is inserted into the fixing groove (122).

5. The screw driver according to claim 4, characterized in that: The fixing protrusions (43) and the fixing grooves (122) are each provided in two groups. The two groups of fixing protrusions (43) are relatively provided on both sides of the toggle member (42) along a third direction. The two groups of fixing grooves (122) are relatively provided on both sides of the limiting groove (121) along the third direction. Each group of fixing grooves (122) comprises a plurality of fixing grooves (122) arranged at intervals along the second direction. The third direction is perpendicular to both the first direction and the second direction.

6. The screw driver according to claim 3, characterized in that: The housing (1) comprises a mounting portion (11) and a connecting portion (12) connected to each other, the mounting portion (11) having the mounting cavity (10), the limiting groove (121) being arranged on the connecting portion (12), a portion of the pushing member (41) extending into the mounting cavity (10), and the other portion of the pushing member (41) being provided with the toggle member (42) and passing through the cavity of the connecting portion (12), so that the toggle member (42) passes through the limiting groove (121).

7. The screw driver according to any one of claims 1 to 6, characterized in that: The transmission assembly (2) further comprises a toothed belt (23), wherein the toothed belt (23) is sleeved on the outer circumference of the driving wheel (21) and the driven wheel (22), a first transmission tooth is arranged on the outer circumference of the driving wheel (21), and a second transmission tooth is arranged on the outer circumference of the driven wheel (22), and the first transmission tooth and the second transmission tooth are both meshed with the toothed belt (23).

8. The screw driver according to any one of claims 1 to 6, characterized in that: The screw driver further comprises a rotating member (5), one end of which can pass through the first rotating hole (111) and be inserted into the rotating center hole of the driving wheel (21), and the rotating member (5) is used to drive the driving wheel (21) to rotate.

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