Working head storage rack and manual screwing tool

Abstract

The utility model discloses a technical scheme of a working head storage rack and a manual screwing tool, belongs to a manual tool, and aims to solve the problem that the existing working head storage rack can store a small number of standby working heads and is difficult to meet the use requirements. The working head storage rack is characterized in that a plurality of clamping walls extending front and back are distributed along the circumference of the working head storage rack; according to the working head storage rack, the containing positions used for storing the standby working heads are formed between the adjacent clamping walls, the adjacent containing positions share the same clamping wall, the number of the clamping walls is reduced, the arrangement that the containing positions and the clamping walls are distributed at intervals and are equal in number can be achieved, the circumferential distance between every two adjacent containing positions is reduced, and the containing positions on the working head storage rack are increased; more standby working heads can be stored; moreover, each containing position is provided with a radial opening, and the radial openings face the circumferential side consistently, so that the taking-out direction of the standby working head deviates from the radius direction, the two clamping walls for limiting the containing positions are asymmetrical relative to the radial direction, and the standby working head is convenient to take and store.

Description

Technical Field

[0001] This utility model belongs to the field of hand tool technology, specifically relating to a working head storage rack and a manual screwing tool. Background Technology

[0002] Manual screwdrivers and other tightening tools should be versatile to tighten parts of different sizes in different situations. Existing manual screwdrivers that lack spare heads or have a limited number of spare heads are insufficient to meet usage needs.

[0003] For ease of carrying, a tool head storage rack is stored inside the tool handle. This type of tool head storage rack is like... Figure 20 The diagram shows several accommodating positions extending forward and backward along a circumference, where spare working heads 400 are stored. When retrieving a spare working head, it is taken out along the radial direction d2 of the working head storage rack. To ensure the accommodating positions can clamp the spare working head and facilitate retrieval, the clamping walls of the accommodating positions need to be elastic. Therefore, a gap 570 is typically maintained between the clamping walls of adjacent accommodating positions. This requires two clamping walls for each accommodating position, increasing the circumferential distance between adjacent accommodating positions (the central angle occupied by adjacent accommodating positions is larger). Since the diameter of the working head storage rack is smaller than the diameter of the tool handle, the number of accommodating positions on the working head storage rack is limited, resulting in a smaller number of spare working heads that can be stored.

[0004] In addition, in some confined spaces, it is not easy for screwing tools to screw parts. Utility Model Content

[0005] This utility model addresses the shortcomings of existing workhead storage racks, which have a limited capacity for storing spare workheads and cannot meet user needs. It provides a workhead storage rack that can store a larger number of spare toolheads and a manual screwing tool.

[0006] To achieve the above objectives, the working head storage rack of this utility model has several front-to-back extending clamping walls distributed along the circumference, and adjacent clamping walls form a accommodating position for storing spare working heads. Adjacent accommodating positions share the same clamping wall, and the accommodating position has a radial opening. Each radial opening faces one side in the circumferential direction, causing the removal direction of the spare working head to deviate from the radial direction.

[0007] This workhead storage rack, because adjacent clamping walls form storage spaces for spare workheads, and adjacent storage spaces share the same clamping wall, reduces the number of clamping walls and achieves a layout where the storage spaces and clamping walls are spaced apart and of equal number. It also reduces the circumferential distance between two adjacent storage spaces (the central angle occupied by two adjacent storage spaces is smaller), and increases the number of storage spaces on the workhead storage rack, allowing it to store more spare workheads.

[0008] The working head storage rack has a radial asymmetry between the two clamping walls that define the accommodating position and the radial direction, which makes it easier to retrieve and store the spare working heads. This is because the radial openings of each accommodating position are all aligned with one side of the circumference.

[0009] Preferably, the clamping wall includes a radial wall and an elastic inclined wall extending from the outer end of the radial wall. One side of the elastic inclined wall constrains the spare working head, while the other side avoids the spare working head. This structure, based on the presence of the elastic inclined wall, makes the two clamping walls constituting a receiving position asymmetrical in their relative radial directions. Therefore, the elastic inclined wall has different functions for the receiving positions on both sides: for one side, it constrains the spare working head and determines the removal direction of the spare working head; for the other side, it avoids the spare working head to maintain a large elastic deformation capacity, facilitating the retrieval, insertion, and clamping of the spare working head.

[0010] Preferably, the width of the accommodating opening is smaller than the width of its bottom. Accordingly, the spare working head is clamped in the accommodating position by the elastic holding force of the elastic inclined wall, preventing the spare working head from loosening and dislodging from the accommodating position.

[0011] Preferably, the accommodating position has a bottom plane that intersects a radial plane of the working head storage rack. This radial plane is defined by the centerline of the spare working head in the accommodating position and the axis of the working head storage rack. Accordingly, for a spare working head with a regular polygonal cross-section, the radial dimension of the accommodating position is smaller than the circumcircle of the spare working head's cross-section, thus reducing the diameter of the working head storage rack.

[0012] Preferably, the opening of the receiving position is provided with a hook flange corresponding to the bottom of the receiving position. The hook flange hooks onto the edge of the spare working head and restrains the spare working head in the receiving position. The hook flange can better restrain the spare working head in the receiving position and prevent the spare working head from loosening.

[0013] Preferably, the working head storage rack includes a front wall and a rear wall. The front wall is located in front of the receiving position to restrict the spare working head from moving forward and exiting the receiving position, and the rear wall is located behind the receiving position to restrict the spare working head from moving backward and exiting the receiving position.

[0014] Preferably, the working head storage rack includes a first tubular member, a second tubular member, and a third tubular member. The first tubular member is fitted onto the second tubular member, and the third tubular member is fitted onto the second tubular member and axially positioned by the first and second tubular members. The receiving position is located in the third tubular member, with the front end wall located in the first tubular member and the rear end wall located in the second tubular member. This working head storage rack structure allows the first, second, and third tubular members to have different functions. For example, the first and second tubular members can be made of the same material, giving them structural rigidity and strength, while the third tubular member can be made of a different material, giving it elasticity in the clamping wall.

[0015] The manual screw-on tool of this utility model includes:

[0016] A handle for applying torque by hand gripping, the handle includes a handle body, a receiving cavity is provided inside the handle body, and a tail cap that can be opened to cover the receiving cavity is provided at the rear end of the handle body.

[0017] The head extends from the front end of the handle;

[0018] The working head is replaceably mounted on the head;

[0019] Spare working head;

[0020] The present invention relates to a working head storage rack, wherein the working head storage rack is located in a receiving cavity and can be removed from the receiving cavity.

[0021] Because the handle has a suitable diameter for easy gripping, a diameter that is too large or too small makes it difficult to grip firmly and apply torque. This manual screwdriver allows for the storage of working heads and spare working heads in the handle's cavity, while also increasing the number of spare working heads. Furthermore, it facilitates carrying and retrieving spare working heads, and prevents them from being lost.

[0022] Preferably, the receiving cavity has a fixed constraint member, and the working head storage rack is constrained in the receiving cavity by the constraint member. When the working head storage rack is subjected to an outward external force, it overcomes the constraint of the constraint member and is moved out of the receiving cavity. Accordingly, the working head storage rack is fixed in the receiving cavity by the constraint member, preventing the working head storage rack from shaking unrestrained in the receiving cavity.

[0023] Preferably, the working head storage rack includes a front end wall, and the constraint member is provided with an elastic hook and a hole separately from the front end wall. The elastic hook hooks onto the edge of the hole to constrain the working head storage rack in the receiving cavity. When the working head storage rack is subjected to an outward external force, the elastic hook is forced to slide off the edge of the hole and be removed from the receiving cavity.

[0024] Preferably, the working head storage rack has a through hole extending in the front-to-back direction, and the restraint member has a guide rod that passes through the through hole of the working head storage rack. This facilitates the placement of the working head storage rack into the receiving cavity.

[0025] Preferably, the rear end of the guide rod has a radially expanded portion that elastically contacts the rear end edge of the through hole. This prevents the working head storage rack from wobbling. Furthermore, when the working head storage rack is subjected to an outward external force, the expanded portion is forced to slide off the rear end edge of the through hole and be removed from the receiving cavity.

[0026] Preferably, the through hole has the same cross-sectional shape as the guide rod, thereby preventing the working head storage rack from rotating relative to the guide rod. This secures the working head storage rack within the receiving cavity, preventing movement.

[0027] Preferably, the tail cap is connected to the working head storage rack to allow the working head storage rack to be removed from and placed into the receiving cavity via the tail cap. This configuration facilitates the operation of placing and removing the working head storage rack from the receiving cavity.

[0028] Preferably, the tail cap and the working head storage rack are provided with a first ring rib and a second ring rib respectively, and the first ring rib and the second ring rib abut against each other to connect the tail cap and the working head storage rack together. This structure is simple and compact, the connection is reliable, and it is also easy to assemble and disassemble.

[0029] Preferably, the tail cap is rotatably fitted to the working head storage rack, and the tail cap is threadedly connected to the handle. This ensures a reliable connection between the tail cap and the handle, eliminating concerns about loosening of the threads.

[0030] Preferably, the tail cap and the working head storage rack are respectively provided with front-to-back extending anti-rotation grooves and anti-rotation ribs. The anti-rotation ribs are engaged with the anti-rotation grooves to prevent the tail cap and the working head storage rack from rotating relative to each other. In view of this, the working head storage rack can be further constrained in the receiving cavity, and the working head storage rack can also prevent the tail cap from rotating. The two are complementary.

[0031] Preferably, the inner wall of the receiving cavity has front-to-back extending extrusion ribs that radially press against the outer wall of the tail cap, while anti-rotation ribs are located on the inner wall of the tail cap and radially correspond to the extrusion ribs. The tail cap is thus installed in place. In particular, because the extrusion ribs radially press against the outer wall of the tail cap, and the anti-rotation ribs are located on the inner wall of the tail cap and radially correspond to the extrusion ribs, sufficient resistance to deformation can be ensured even when the tail cap wall is thin, ensuring a tight fit of the tail cap to the rear end of the handle.

[0032] This utility model also addresses the shortcomings of existing manual screwing tools in that they are not easy to screw parts in some confined spaces, and provides a manual screwing tool that can screw parts in confined spaces by changing its own shape to adjust its posture.

[0033] To achieve the above objectives, the manual screwing tool of this utility model includes:

[0034] A handle for gripping and applying torque;

[0035] The head includes a first rod and a second rod. The first rod is fixed to the front end of the handle, and the rear end of the second rod is rotatably mounted to the front end of the first rod via a pin. The rear end of the second rod is also provided with a toothed groove that rotates around the pin.

[0036] The locking tongue extends into the tooth groove to lock the second rod and prevent the second rod from rotating;

[0037] An unlocking element, configured on the first lever, is used to unlock the bolt from locking the second lever to allow the second lever to rotate;

[0038] The working head is replaceably mounted on the front end of the second member.

[0039] Therefore, during tightening, the second lever can be rotated as needed to adjust the shape of the manual tightening tool and adjust its posture so that the working head is correctly aligned with the part for tightening. This is especially useful in confined spaces, where the shape of the manual tightening tool can be changed to adjust its posture for tightening parts in such spaces.

[0040] In one embodiment, the unlocking element is radially telescopically disposed on the first link, and the locking tongue is fitted to the unlocking element for radial movement by the unlocking element. Accordingly, locking and unlocking of the locking tongue on the second link is achieved by radially actuating the unlocking element (e.g., by pressing).

[0041] Preferably, the unlocking member has an elastic element. The elastic force of the elastic element keeps the bolt in the locked position and causes the unlocking member to protrude from the handle, so that the bolt is always kept in the locked state when turning. Pressing the unlocking member and overcoming the elastic force of the elastic element causes the unlocking member to move along the axial direction of the pin and out of the tooth groove, so as to adjust the posture of the second rod.

[0042] Preferably, the front end of the first rod has two ears, the rear end of the second rod and the toothed groove are located between the two ears, and the pin passes through the rear end of the second rod and is fixed to the two ears. Accordingly, when the torque is transmitted from the handle and the first rod to the second rod, the pin is subjected to uniform force.

[0043] Preferably, the first rod has a first blind hole parallel to the pin and a through hole connecting the first blind hole and extending forward. The unlocking member is inserted into the first blind hole, and the unlocking member has a second blind hole, through which the locking tongue is inserted into the second blind hole. Accordingly, the unlocking member is guided by the first blind hole to prevent it from shaking and to facilitate assembly.

[0044] In one embodiment, the unlocking member is telescopically disposed on the first member, and the locking tongue is disposed on the unlocking member for being moved in the front-back direction by the unlocking member.

[0045] Preferably, the second rod is equipped with a reversing structure for switching the direction of the torque applied by the working head.

[0046] This invention utilizes several forward- and backward-extending clamping walls distributed along the circumference of a workhead storage rack. Adjacent clamping walls form storage spaces for spare workheads, with adjacent spaces sharing the same clamping wall. Each storage space has a radial opening, and all radial openings face the same circumferential direction, causing the removal direction of the spare workhead to deviate from the radial direction. This reduces the number of clamping walls, achieving an equal number of spaced storage spaces, and decreasing the circumferential distance between adjacent storage spaces (resulting in a smaller central angle between adjacent storage spaces). The increased number of storage spaces on the workhead storage rack allows for the storage of more spare workheads.

[0047] The working head storage rack of this utility model has a radial opening in each of the accommodating positions that faces one side in the circumferential direction, causing the direction of taking out the spare working head to deviate from the radial direction. This makes the two clamping walls that limit the accommodating position radially asymmetrical, which facilitates the use and storage of spare working heads.

[0048] This invention places the working head storage rack within the receiving cavity of the handle. While ensuring the handle is comfortable to grip, it allows for the storage of both the working head storage rack and spare working heads within the receiving cavity, thus increasing the number of spare working heads. Furthermore, it facilitates carrying and retrieving spare working heads, and prevents them from being lost.

[0049] This utility model enables multiple operation methods for retrieving the working head storage rack by using different assembly methods of the tail cap.

[0050] This invention also features a head at the front end of the handle, and a locking tongue and unlocking mechanism on the head. The head includes a first rod and a second rod. The first rod is fixed to the front end of the handle, and the rear end of the second rod is rotatably mounted to the front end of the first rod via a pin. The rear end of the second rod also has a toothed groove that rotates around the pin. The locking tongue extends into the toothed groove to lock the second rod and prevent it from rotating. The unlocking mechanism is located on the first rod to unlock the locking tongue from locking the second rod, allowing it to rotate. Therefore, during tightening, the shape of the manual tightening tool can be adjusted by rotating the second rod as needed to ensure the working head is correctly aligned with the part for tightening. This is especially useful in confined spaces, where the shape of the manual tightening tool can be changed to adjust its posture for tightening parts in tight spaces. Attached Figure Description

[0051] Figure 1 This is an isometric view of the manual screwing tool of this utility model;

[0052] Figure 2 for Figure 1 Another perspective of the manual screw-on tool shown;

[0053] Figure 3 for Figure 1-2 A schematic diagram of the manual screwdriver shown from one perspective;

[0054] Figure 4 for Figure 3 AA-direction cross section;

[0055] Figure 5 for Figure 3 Top view;

[0056] Figure 6 for Figure 5 BB-direction cross-section;

[0057] Figure 7 for Figure 1-2 The diagram shown is an exploded view of the manual screwdriver.

[0058] Figure 8 for Figure 7 An exploded view of the working head storage rack shown in the diagram;

[0059] Figure 9 This is a cross-sectional schematic diagram of the receiving position of this utility model;

[0060] Figure 10 for Figure 9 A schematic diagram showing the placement of a spare working head in the indicated location;

[0061] Figure 11 A schematic diagram showing the removal of the workhead storage rack from the handle;

[0062] Figure 12 for Figure 11 Exploded view of the structure of the working head storage rack and tail cover;

[0063] Figure 13 This is a schematic diagram of the manual screwing tool of this utility model, which adjusts its posture by rotating the second rod.

[0064] Figure 14 This is an exploded view of the head structure of this utility model;

[0065] Figure 15 for Figure 14 A schematic diagram of the structure shown from another perspective;

[0066] Figure 16 This is a schematic diagram of the locking tongue locking the second rod of this utility model;

[0067] Figure 17 This is a schematic diagram of the locking tongue unlocking the second member according to this utility model;

[0068] Figure 18 for Figure 6 An enlarged schematic diagram showing the connection between the tail cap and the handle;

[0069] Figure 19 for Figure 18 CC-direction sectional view;

[0070] Figure 20 A schematic diagram showing the placement of spare working heads in the storage compartments of an existing working head storage rack;

[0071] Explanation of the labels in the diagram:

[0072] 100 handles,

[0073] 110 Handle body, 111 Receiving cavity, 112 Extrusion rib, 113 Notch

[0074] 120 tail cap, 121 anti-rotation convex rib, 122 first ring rib, 123 concave part, 124 convex part,

[0075] 130 Constraint, 131 Elastic Hook, 132 Guide Rod, 133 Radial Expansion Part;

[0076] 200 heads,

[0077] 210 First member, 211 Ear, 212 First blind hole, 213 Through hole

[0078] 220 Second member, 221 Tooth groove, 222 Reversing structure, 223 Rotating sleeve,

[0079] 230 pin;

[0080] 300 working heads;

[0081] 400 Spare working head, 401 Edge of spare working head, 402 Center line of spare working head, 403 Circumscribed circle;

[0082] 500 working head storage rack

[0083] 510 First tubular member, 511 Front end wall, 512 Hole, 513 First step

[0084] 520 Second tubular member, 521 Rear end wall, 522 Second step, 523 Shaft retaining ring, 524 Anti-rotation groove, 525 Second annular rib.

[0085] 530 Third tubular component, 531 Receiving position, 532 Radial opening, 533 Clamping wall, 534 Radial wall, 535 Elastic inclined wall, 536 Bottom plane, 537 Hook flange, W1 Width of opening, W2 Width of bottom, d1 Removal direction, d2 Radial direction

[0086] The axis of the 540 working head storage rack.

[0087] 550 radial surface,

[0088] The rear edge of the 560 through hole and the 561 through hole;

[0089] 570 gap;

[0090] 600 locking tongue;

[0091] 700 unlocking part, 701 second blind hole;

[0092] 800 elastic element. Detailed Implementation

[0093] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0094] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion, such as a method or product that includes a series of technical features, not limited to those technical features explicitly listed, but also including other technical features that may be included in the method or product but not explicitly listed.

[0095] In the description of this utility model, it should be understood that the terms "front" and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Among them, "front" and "rear" are opposite directions.

[0096] In the description of this utility model, it should be understood that the technical features defined by terms such as "first" and "second" which have a sequential concept are only for the purpose of clearly describing the defined technical features and making the defined technical features clearly distinguishable from other technical features, and do not represent that they are named in this way in actual implementation. Therefore, they should not be construed as limitations on this utility model.

[0097] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0098] like Figure 8-10As shown, addressing the shortcomings of existing workhead storage racks that store a limited number of spare workheads and cannot meet usage needs, this workhead storage rack 500 has several circumferentially distributed, extending front-to-back clamping walls 533. Adjacent clamping walls 533 form accommodating positions 531 for storing spare workheads. Adjacent accommodating positions 531 share the same clamping wall. Each accommodating position 531 has a radial opening 532, with each radial opening 532 facing uniformly to one circumferential side, causing the removal direction d1 of the spare workhead 400 to deviate from the radial direction d2, thereby forming an angle α between the removal direction d1 and the radial direction d2. This angle α is preferably acute, and more preferably 45°. Therefore, it can be as follows... Figure 10 The spare working head 400 is shown stored in the receiving position 531 of the working head storage rack 300. Each radial opening 532 faces uniformly to one circumferential side, which is equivalent to... Figure 8 Each radial opening 532 is deflected to one side by an included angle α along the circumference from the radial direction. The radial direction d2 is the perpendicular line between the axis 540 of the working head storage rack and the center line 402 of the spare working head.

[0099] This workhead storage rack, because adjacent clamping walls form storage spaces for spare workheads, and adjacent storage spaces share the same clamping wall, reduces the number of clamping walls and achieves a layout where the storage spaces and clamping walls are spaced apart and of equal number. It also reduces the circumferential distance between two adjacent storage spaces (the central angle occupied by two adjacent storage spaces is smaller), and increases the number of storage spaces on the workhead storage rack, allowing it to store more spare workheads.

[0100] The working head storage rack has a radial asymmetry between the two clamping walls that define the accommodating position and the radial direction, which makes it easier to retrieve and store the spare working heads. This is because the radial openings of each accommodating position are all aligned with one side of the circumference.

[0101] In the illustrated structure, clamping wall 533 includes a radial wall 534 and an elastic inclined wall 535 extending from the outer end of the radial wall. One side of the elastic inclined wall 535 defines a receiving position to constrain the spare working head, while the other side deviates from the receiving position to avoid the spare working head. This structure, based on the elastic inclined wall, makes the two clamping walls constituting a receiving position asymmetrical in their relative radial directions. Therefore, the elastic inclined wall has different functions for the receiving positions on both sides: for one side, it constrains the spare working head and determines the removal direction of the spare working head; for the other side, it avoids the spare working head to maintain a large elastic deformation capacity, facilitating the retrieval, insertion, and clamping of the spare working head. The radial opening 532 is defined by the adjacent elastic inclined wall 535 and radial wall 534.

[0102] In the illustrated structure, the width W1 of the receiving position opening is smaller than the width W2 of its bottom. Accordingly, relying on the elastic holding force of the elastic inclined wall 535, the spare working head is clamped in the receiving position, and the spare working head is prevented from loosening and dislodging from the receiving position.

[0103] In the illustrated structure, the accommodating position 531 has a bottom plane 536, which intersects with a radial plane 550 of the working head storage rack. The bottom plane 536 is also perpendicular to the radial plane 550. The radial plane is the plane defined by the centerline of the spare working head in the accommodating position and the axis of the working head storage rack. Figure 9 In this context, the radial plane 550 is projected as a straight line in the radial direction d2. Therefore, as... Figure 10 As shown, for the spare working head with a cross-section of a regular polygon, the outline of the accommodating position 531 is smaller than the circumcircle 403 of the cross-section of the spare working head, thus reducing the diameter of the working head storage rack.

[0104] In the illustrated structure, the opening of the receiving position 531 is provided with a hook 537 corresponding to the bottom of the receiving position. The hook 537 hooks onto the edge 401 of the spare working head, constraining the spare working head in the receiving position. The hook can better constrain the spare working head in the receiving position and prevent the spare working head from loosening. The hook can be moved in the direction of widening the opening by the elasticity of the clamping arm to allow the spare working head to be removed.

[0105] In the illustrated structure, the working head storage rack 500 includes a front wall 511 and a rear wall 521. The front wall 511 is located in front of the accommodating position 531 to restrict the spare working head from moving forward and exiting the accommodating position. The rear wall 521 is located behind the accommodating position 531 to restrict the spare working head from moving backward and exiting the accommodating position.

[0106] Furthermore, the working head storage rack 500 includes a first tubular member 510, a second tubular member 520, and a third tubular member 530. The first tubular member 510 is fitted onto the second tubular member 520, and the third tubular member 530 is fitted onto the second tubular member 520 and is axially positioned by the relative first step 513 and second step 522 formed by the first tubular member 510 and the second tubular member 520. The receiving position 531 is provided in the third tubular member 530, the front end wall 511 is located in the first tubular member 510, and the rear end wall 521 is located in the second tubular member 520. During assembly, the third tubular member 530 is first fitted onto the second tubular member 520, and then the first tubular member 510 is fitted onto the second tubular member 520. A shaft retaining ring 523 is fitted onto the end of the second tubular member 520 that extends beyond the first tubular member 510. The third tubular member 530 is then axially positioned by the opposing first step 513 and second step 522 on the first tubular member 510 and the second tubular member 520. This structure allows the first, second, and third tubular members to have different functions. For example, the first and second tubular members are made of the same material, giving them structural rigidity and strength, while the third tubular member is made of a different material, giving it the elasticity of the clamp wall.

[0107] Figure 8-10 The tool head storage rack shown is preferably attached to a manual screwdriver so that spare tool heads can be selected as needed.

[0108] Specifically, such as Figure 1-7 As shown, the manual screwdriver includes a handle 100, a head 200, a working head 300, a spare working head 400, and... Figure 8-10 The workhead storage rack 500 is shown.

[0109] The handle 100 is for hand gripping and applying torque. The handle includes a handle body 110, a tail cap 120, and a restraint member 130. The handle body 110 has a receiving cavity 111, and the rear end of the handle body 110 has an openable tail cap 120 that covers the receiving cavity.

[0110] The head 200 extends from the front end of the handle 100 for accessing the selected screwing part.

[0111] The working head 300 is replaceably mounted on the front end of the head 200; the working head is adapted to the part being screwed. For example, when the part being screwed is a screw, the working head is a screwdriver bit.

[0112] The spare working head 400 is available for users to choose from as needed, and is suitable for screwing more parts of various sizes.

[0113] 500 working head storage racks Figure 1-7 As shown, it is located in the receiving cavity 111 and can be... Figure 7 , Figure 11 The figure shows the product being removed from the receiving cavity.

[0114] Because the handle has a suitable diameter for easy gripping, a diameter that is too large or too small makes it difficult to grip firmly and apply torque. This manual screwdriver allows for the storage of working heads and spare working heads in the handle's cavity, while also increasing the number of spare working heads. Furthermore, it facilitates carrying and retrieving spare working heads, and prevents them from being lost.

[0115] like Figure 4 , Figure 6 , Figure 7 As shown, the receiving cavity 111 has a fixed constraint member 130, which is fastened to the front wall of the receiving cavity by fasteners. The working head storage rack 500 is constrained in the receiving cavity by the constraint member 130. When the working head storage rack is subjected to an outward external force, it overcomes the constraint of the constraint member and is moved out of the receiving cavity. Accordingly, the working head storage rack is fixed in the receiving cavity by the constraint member to prevent the working head storage rack from shaking unrestrained in the receiving cavity. The constraint member is fixed to the receiving cavity by assembly, which is conducive to individual manufacturing. The function of constraining the working head storage rack is given by selecting the material and designing the structure.

[0116] like Figure 6 , Figure 7 As shown, the constraint member 130 is provided with an elastic hook 131 and a hole 512 separately from the front end wall 511. The elastic hook 131 hooks onto the edge of the hole to constrain the working head storage rack in the receiving cavity. When the working head storage rack is subjected to an outward external force, the elastic hook is forced to slide off the edge of the hole and be removed from the receiving cavity.

[0117] like Figure 4 , Figure 6 , Figure 7 As shown, the working head storage rack 500 has a through hole 560 extending in the front-rear direction, and the restraint member 130 has a guide rod 132 that passes through the through hole 560 of the working head storage rack. This facilitates guiding and placing the working head storage rack into the receiving cavity. In particular, the rear end of the guide rod 132 has a radial expansion portion 133, which is separated by a gap between them. Therefore, when the radial expansion portions are subjected to a radial external force pointing towards their center, they can move towards each other towards the center. In the natural state, the radial expansion portions elastically contact the rear end edge of the through hole, preventing the working head storage rack from shaking. Moreover, when the working head storage rack is subjected to an outward external force, the expansion portions are forced to slide off the rear end edge of the through hole and be removed from the receiving cavity.

[0118] Based on the above structure, the working head storage rack is constrained in the receiving cavity by using elastic hooks to hook the edge of the hole and the rear end edge of the radial expansion part to elastically contact the through hole.

[0119] like Figure 4 Figure 7As shown, the cross-sectional shape of the through hole 560 is consistent with that of the guide rod 132, thereby preventing the work head storage rack from rotating relative to the guide rod. This fixes the work head storage rack in the receiving cavity, preventing it from shaking. In the illustrated structure, the through hole is a flat hole, and the guide rod is a flat rod; therefore, the guide rod being located within the through hole restricts the rotation of the work head storage rack.

[0120] To facilitate access to the working head storage rack and its placement within the receiving cavity, the tail cap 120 and the working head storage rack 500 are as follows: Figure 11 The components shown are connected together to allow for the removal of the working head storage rack from the receiving cavity and the placement of the working head storage rack into the receiving cavity via the tail cap. This structure facilitates the operation of placing and removing the working head storage rack from the receiving cavity. Specifically, as... Figure 12 As shown, the tail cap 120 and the second tubular component 520 of the working head storage rack are provided with a first ring rib 122 and a second ring rib 525 respectively. The first ring rib 122 and the second ring rib 525 are as follows: Figure 18 The opposing mechanism shown connects the tail cap to the working head storage rack. This structure is simple and compact, provides a reliable connection, and facilitates assembly and disassembly. From Figure 12 When the tail cap 120 and the working head storage rack 500 are assembled together in the disassembled state shown, external force is used to press the tail cap 120 and the working head storage rack together in the front-to-back direction, causing the first ring rib 122 and the second ring rib 525 to contact each other and forcibly pass over each other to achieve interlocking. Figure 18 The assembly state is shown. From... Figure 18 When the tail cap 120 and the working head storage rack 500 are separated in the assembled state shown, the tail cap 120 and the working head storage rack 50 are pulled apart by external force along the front-back direction, causing the first ring rib 122 and the second ring rib 525 to forcibly cross each other and separate, achieving... Figure 12 The split state is shown.

[0121] Since the tail cap 120 and the working head storage rack 500 are connected together by abutting against the first ring rib 122 and the second ring rib 525, the tail cap 120 and the working head storage rack 500 are rotatably coupled. Even if the working head storage rack is constrained by the restraint and cannot rotate within the receiving cavity, the tail cap 120 can still rotate relative to the handle 100 and the working head storage rack 500. Thus, the tail cap 120 and the handle body 110 can be connected together by threads. This ensures a reliable connection between the tail cap and the handle body without worrying about loosening of the threads.

[0122] Although, as described above, the tail cap 120 and the working head storage rack 500 are connected together by the first ring rib 122 and the second ring rib 525 and can maintain a rotational fit, this rotation is not necessary. Figure 12 , Figure 19As shown, the tail cap 120 and the second tubular member 520 of the working head storage rack are respectively provided with front-to-back extending anti-rotation grooves 524 and anti-rotation ribs 121. The anti-rotation ribs 121 are engaged with the anti-rotation grooves 524 to prevent the tail cap and the working head storage rack from rotating relative to each other. In view of this, the tail cap can further constrain the working head storage rack in the receiving cavity, and the working head storage rack can also prevent the tail cap from rotating; the two are complementary. Furthermore, in other embodiments, the tail cap can be integrally formed with the second tubular member.

[0123] Since the tail cap 120 and the working head storage rack 500 are prevented from rotating relative to each other, and the working head storage rack 500 is constrained by the restraints and cannot rotate within the receiving cavity, a threaded connection between the tail cap 120 and the handle 110 is not feasible. In this case, the tail cap 120 can be tightly fitted to the rear end of the handle 110. Figure 7 , Figure 18-19 As shown, the inner wall of the receiving cavity has front-to-back extending compression ribs 112. The compression ribs 112 radially press against the outer wall of the tail cap 120, and the anti-rotation rib 121 is located on the inner wall of the tail cap 120 and radially corresponds to the compression ribs 112. According to this structure, the tail cap 120 is inserted into the rear end of the receiving cavity 111 by external force until it is in place. The inner wall of the receiving cavity positions the tail cap radially, and the tail cap radially positions the rear end of the working head storage rack, preventing the working head storage rack from shaking. In particular, because the compression ribs radially press against the outer wall of the tail cap, and the anti-rotation rib is located on the inner wall of the tail cap and radially corresponds to the compression ribs, it can be ensured that even with a thinner wall, the tail cap still has sufficient resistance to deformation, ensuring that the tail cap is tightly fitted to the rear end of the handle. Given this structure where the tail cap is tightly fitted to the rear end of the handle, as... Figure 11-12 As shown, the tail cap 120 has opposing recesses 123 to allow for pinching the tail cap with fingers to apply a backward pulling force when removing it. To ensure accurate assembly of the tail cap, corresponding indicator structures are provided at the rear ends of the tail cap and the handle, such as... Figure 7 As shown, a notch 113 is provided at the rear end of the inner wall of the receiving cavity, as... Figure 11-12 As shown, a protrusion 124 is provided on the tail cap. When the tail cap is assembled to the rear end of the handle, the protrusion 124 is aligned with the notch 113 to insert the tail cap into the rear end of the receiving cavity. Furthermore, when the protrusion is aligned with the notch, the elastic hook 31 and the hole 512, and the guide rod 132 and the through hole 560 are also aligned.

[0124] In addition to Figure 11 As shown, the tail cap 120 is connected to the working head storage rack. Besides accessing the working head storage rack through the tail cap, it can also be used as follows: Figure 7As shown, the tail cap 120 and the working head storage rack 500 are detached, making it convenient to remove the tail cap 120 first and then retrieve the working head storage rack 500. Regardless of which method is used to retrieve the working head storage rack, when the working head storage rack is pulled backward, the elastic hook 131 disengages from the edge 512 of the hole, and the radial expansion portion 133 disengages from the rear end edge 561 of the through hole, thus freeing it from the constraint of the restraint. When the working head storage rack is placed in the receiving cavity, if the working head storage rack is subjected to a direct or indirect forward thrust from the tail cap, the elastic hook 131 hooks onto the edge 512 of the hole, and the radial expansion portion 133 elastically contacts the rear end edge 561 of the through hole to restrain the working head storage rack in the receiving cavity.

[0125] To address the shortcomings of existing manual screwing tools in making it difficult to screw parts in confined spaces, this manual screwing tool adjusts its shape and posture to screw parts in confined spaces.

[0126] Specifically, such as Figure 1-7 , Figure 11 , Figure 13 As shown, the manual screw-on tool also includes a locking tongue 600 and an unlocking component 700. And the head 200 is as follows... Figure 14-15 The figure shows a first rod 210 and a second rod 620. The first rod 610 is fixed to the front end of the handle 110. The rear end of the second rod 620 is rotatably assembled to the front end of the first rod 210 via a pin 230. The rear end of the second rod 620 is also provided with a toothed groove 221 that rotates around the pin.

[0127] The locking tongue 600 extends into the tooth groove 221 to lock the second rod and prevent the second rod from rotating.

[0128] The unlocking element 700 is configured on the first lever 210 to unlock the locking tongue 600 and lock the second lever 220 to allow the second lever to rotate.

[0129] The working head 300 can be replacedly mounted on the front end of the second member 220.

[0130] Therefore, when screwing, it can be done as follows: Figure 13 The second lever 220 is rotated as needed to adjust the shape of the manual screwdriver, thereby adjusting its posture to ensure the working head is correctly aligned with the workpiece for screwing. This is particularly useful in confined spaces, where adjusting the shape of the manual screwdriver allows for screwing workpieces in tight spaces. Figure 13 In the diagram, dashed lines indicate the positions that the second member can rotate to, but it is not limited to the positions shown.

[0131] In the illustrated structure, the unlocking element 700 is radially telescopically disposed on the first lever 210, the radial direction being perpendicular to the front-back direction, i.e., the radial direction of the handle. The latch 600 is fitted to the unlocking element 700 and is moved radially by the unlocking element. Accordingly, locking and unlocking of the latch on the second lever is achieved by radially actuating the unlocking element (e.g., by pressing).

[0132] like Figure 14-15 As shown, an elastic element 800 acts on the unlocking component 700. The elastic element shown is a helical compression spring that applies elastic force to the unlocking component. The elastic force of the elastic element 800 is as follows: Figure 2 , Figure 5 and Figure 16 As shown, the bolt is held in the locked position with the unlocking element 700 protruding from the handle, thus keeping the bolt locked during turning; pressing the unlocking element overcomes the elastic force of the spring element, causing the unlocking element to move the bolt axially along the pin. Figure 17 The toothed groove is disengaged so that the posture of the second lever can be adjusted by rotation. To clearly illustrate the positions of the unlocking element 700 and the locking tongue 600, in... Figure 16 , Figure 17 The first member 210 was removed.

[0133] like Figure 14-15 As shown, the front end of the first rod 210 has two ears 211, the rear end and toothed groove 221 of the second rod 220 are located between the two ears 211, and the pin 230 passes through the rear end of the second rod and is fixed to the two ears 211. Accordingly, when the torque is transmitted from the handle and the first rod to the second rod, the pin is subjected to uniform force.

[0134] like Figure 14-15 As shown, the first rod 210 has a first blind hole 212 parallel to the pin 230 and a through hole 213 connecting the first blind hole and extending forward. The unlocking member 700 is inserted into the first blind hole 212. The unlocking member 700 has a second blind hole 701, and the locking tongue 600 is inserted into the second blind hole 701 through the through hole 213. Accordingly, the unlocking member is guided by the first blind hole to prevent it from shaking and to facilitate assembly. Furthermore, in the assembled state, the second rod restricts the locking tongue 600 in the second blind hole 701, preventing the locking tongue 600 from disengaging from the second blind hole 701, and the locking tongue 600 also prevents the unlocking member from disengaging from the first blind hole 212, thereby maintaining the assembled relationship.

[0135] like Figure 1-7 , Figure 11 , Figure 13-17As shown, the second lever 220 is equipped with a reversing structure 222 for switching the direction of the torque applied by the working head. The reversing structure 222 can be a ratchet and pawl mechanism or a roller transmission structure. The reversing structure includes a rotating sleeve 223, and the direction of torque transmission is changed by rotating the rotating sleeve to switch the position state of the pawl or roller of the reversing structure.

[0136] The illustrated structure demonstrates how the locking tongue, aided by the elastic force of an elastic element, extends into the tooth groove to lock the second member, preventing its rotation. It also illustrates how pressing the unlocking member overcomes the elastic force of the elastic element, causing the unlocking member to pull the locking tongue out of the tooth groove, allowing the posture of the second member to be adjusted by rotation. This provides a technical inspiration for locking by engaging the locking tongue in the tooth groove and unlocking by disengaging it. Therefore, in other embodiments, the unlocking member is telescopically positioned on the first member, and the locking tongue is positioned on the unlocking member to be moved in the front-back direction by the unlocking member to engage the locking tongue in the tooth groove and disengage it to unlock.

Claims

1. A tool head storage rack characterized by: It has several front-to-back extending clamping walls (533) distributed along the circumference, and adjacent clamping walls (533) form a storage position (531) for storing a spare working head. Adjacent storage positions (531) share the same clamping wall (533). The storage position (531) has a radial opening (532), and each radial opening is uniformly oriented to one side in the circumferential direction, causing the removal direction (d1) of the spare working head to deviate from the radial direction (d2).

2. The tool head storage rack of claim 1, wherein: The clamping wall (533) includes a radial wall (534) and an elastic inclined wall (535) extending from the outer end of the radial wall. One side of the elastic inclined wall (535) constrains the spare working head, and the other side avoids the spare working head.

3. The working head storage rack according to claim 1, characterized in that: The width (W1) of the accommodating opening is smaller than the width (W2) of its bottom.

4. The tool head storage rack of claim 1, wherein: The accommodating position (531) has a bottom plane (536) that intersects a radial plane (550) of the working head storage rack, the radial plane (550) being a plane defined by the center line (402) of the spare working head in the accommodating position and the axis (540) of the working head storage rack.

5. The storage rack of any of claims 1-4, wherein: The opening of the receiving position (531) is provided with a hook (537) corresponding to the bottom of the receiving position. The hook (537) hooks the edge (401) of the spare working head and constrains the spare working head in the receiving position.

6. The tool head storage rack of claim 1, wherein: The working head storage rack (500) includes a front wall (511) and a rear wall (521). The front wall (511) is located in front of the receiving position (531) to restrict the spare working head from moving forward out of the receiving position, and the rear wall (521) is located behind the receiving position (531) to restrict the spare working head from moving backward out of the receiving position.

7. The storage rack of claim 6 wherein: The working head storage rack (500) includes a first tubular member (510), a second tubular member (520) and a third tubular member (530). The first tubular member (510) is fitted onto the second tubular member (520), and the third tubular member (530) is fitted onto the second tubular member (520) and is axially positioned by the first tubular member (510) and the second tubular member (520). The receiving position (531) is located on the third tubular member (530). The front end wall (511) is located on the first tubular member (510), and the rear end wall (521) is located on the second tubular member (520).

8. A hand screwing tool characterized by include: A handle (100) for hand gripping and applying torque, the handle includes a handle body (110), a receiving cavity (111) is provided in the handle body, and a tail cap (120) that can be opened to cover the receiving cavity is provided at the rear end of the handle body. The head (200) extends from the front end of the handle; A working head (300) is replaceably mounted on the head; Spare working head (400); The working head storage rack (500) according to any one of claims 1-7 is located in the receiving cavity (111) and can be removed from the receiving cavity.

9. A hand screwing tool according to claim 8, characterized in that: The receiving cavity (111) has a fixed constraint (130), and the working head storage rack (500) is constrained in the receiving cavity by the constraint (130). When the working head storage rack is subjected to an outward external force, it overcomes the constraint of the constraint and is moved out of the receiving cavity.

10. A hand screwing tool according to claim 9, characterized in that: The working head storage rack (500) includes a front end wall (511), and a constraint member (130) is provided separately on the front end wall (511) with an elastic hook (131) and a hole (512). The elastic hook (131) hooks onto the edge of the hole (512) to constrain the working head storage rack in the receiving cavity. When the working head storage rack is subjected to an outward external force, the elastic hook is forced to slide off the edge of the hole and be removed from the receiving cavity.

11. A hand screwing tool according to claim 9 or 10, characterized in that: The working head storage rack (500) has a through hole (560) extending in the front-to-back direction, and the constraint member (130) has a guide rod (132) that passes through the through hole (560) of the working head storage rack.

12. A hand screwing tool according to claim 11, characterized in that: The rear end of the guide rod (132) has a radial expansion portion (133), which elastically contacts the rear end edge (561) of the through hole.

13. The hand screwing tool according to claim 11, characterized by: The through hole (560) has the same cross-sectional shape as the guide rod (132) and thereby prevents the work head storage rack from rotating relative to the guide rod.

14. The hand screwing tool according to claim 8, characterized by: The tail cap (120) is connected to the working head storage rack (500) to remove the working head storage rack from the receiving cavity and place the working head storage rack into the receiving cavity via the tail cap.

15. A hand screwing tool according to claim 14, characterized in that: The tail cap (120) and the working head storage rack (500) are provided with a first ring rib (122) and a second ring rib (525) respectively. The first ring rib (122) and the second ring rib (525) abut against each other to connect the tail cap (120) and the working head storage rack (500) together.

16. A hand screwing tool according to claim 14 or 15, characterized in that: The tail cap (120) is rotatably engaged with the working head storage rack (500), and the tail cap (120) is connected to the handle body by threads.

17. The hand screwing tool according to any one of claims 8, 14-15, characterized by: The tail cap (120) and the working head storage rack (500) are provided with front and rear extending anti-rotation grooves (524) and anti-rotation ribs (121), respectively. The anti-rotation ribs (121) are inserted into the anti-rotation grooves (524) to prevent the tail cap and the working head storage rack from rotating relative to each other.

18. The hand screwing tool according to claim 17, characterized by: The inner wall of the receiving cavity (111) has front-to-back extending extrusion ribs (112), which are radially extruded on the outer wall of the tail cap (120). The anti-rotation rib (121) is located on the inner wall of the tail cap (120) and corresponds radially to the extrusion ribs (112).

19. A hand screwing tool characterized by include: A handle (100) for hand gripping to apply torque; The head (200) includes a first rod (210) and a second rod (220). The first rod (210) is fixed to the front end of the handle (100). The rear end of the second rod (220) is rotatably mounted to the front end of the first rod (210) via a pin (230). The rear end of the second rod (220) is also provided with a toothed groove (221) that rotates around the pin (230). A locking tongue (600) extends into a tooth groove (221) to lock the second rod (220) and prevent the second rod from rotating; Unlocking element (700), which is configured on the first lever (210) to unlock the latch (600) to lock the second lever to allow the second lever to rotate; The working head (300) is replaceably mounted on the front end of the second member.

20. The hand screwing tool according to claim 19, characterized by: The unlocking element (700) is radially telescopically configured on the first rod (210), and the locking tongue (600) is fitted to the unlocking element (700) for being carried radially by the unlocking element.

21. The hand screwing tool according to claim 20, characterized by: An elastic element (800) is applied to the unlocking member (700). The elastic force of the elastic element (800) keeps the latch (600) in the locked position and causes the unlocking member (700) to protrude from the handle (100). Pressing the unlocking member (700) overcomes the elastic force of the elastic element, causing the unlocking member to move axially along the pin and exit the tooth groove with the latch.

22. The hand screwing tool according to claim 20, characterized by: The front end of the first rod (210) has two ears (211), the rear end and the toothed groove (221) of the second rod (220) are located between the two ears (211), and the pin (230) passes through the rear end of the second rod (220) and is fixed to the two ears (211).

23. A hand screwing tool according to any one of claims 20-22, characterized by: The first rod (210) has a first blind hole (212) parallel to the pin (230) and a through hole (213) connecting the first blind hole and extending forward. The unlocking member (700) is inserted into the first blind hole (212). The unlocking member (700) has a second blind hole (701). The locking tongue (600) is inserted into the second blind hole (701) through the through hole (213).

24. The hand screwing tool according to claim 19, characterized by: The unlocking element is telescopically mounted on the first lever, and the locking tongue is mounted on the unlocking element to be moved in the front-back direction by the unlocking element.

25. The hand screwing tool according to claim 19, characterized by: The second member (220) is equipped with a reversing structure (222).

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