CN220373196U - Convenient to use's hand tool - Google Patents

Abstract

The utility model relates to a hand tool, which comprises a handle and a tool head, and further comprises: the mounting piece is columnar in shape, the first end of the mounting piece is detachably connected with the handle, and the second end of the mounting piece is used for detachably mounting the tool head; the locking piece is detachably connected with the mounting piece, and the locking piece and the mounting piece can move relatively along the length direction of the mounting piece; in the process that the first end of the mounting piece is connected with the handle, the locking piece and the mounting piece relatively move towards a first direction, and the locking piece locks the mounting piece and the tool head; and in the process of disassembling the first end of the mounting piece and the handle, the locking piece and the mounting piece relatively move towards the second direction, and the locking piece unlocks the mounting piece and the tool head. The utility model can realize the replacement of different tool heads, is convenient to replace, and can realize the reliable locking of the tool heads.

Description

Convenient to use's hand tool

Technical Field

The utility model relates to the field of hand auxiliary tools, in particular to a hand tool convenient to use.

Background

In the manual operation, auxiliary operation is needed to be realized through a manual tool, and the conventional manual tool generally fixes a handle and a tool head into an integral structure through injection molding. Such as chinese utility model patent No. ZL201180069514.7 (grant publication No. CN 103442857B), chinese utility model patent No. ZL200880024319.0 (grant publication No. CN 101743101B), etc. The mode of adopting the integral structure can enable the tool head to be firmly connected with the handle, but can lead to the problem that the tool head and the handle cannot be assembled and matched at will. Thus, the molds are required to be manufactured separately for each tool head, the manufacturing cost of the molds is high, meanwhile, because the production needs to have the least production quantity (expressed as a subscription quantity in sales) to ensure the economical efficiency of the cost, and the single-class products (namely, each tool head) are often ordered in a small quantity at one time, and meanwhile, the variety is various, so that a lot of stock materials and funds occupy pressure in the production, and meanwhile, the warehouse management cost is increased.

In order to solve the problems, the tool head and the handle are designed to be detachable, the production cost is reduced by sharing the handle, and different tools can be used for replacing corresponding tool heads. For example, chinese patent No. ZL201921300608.0 (grant notice No. CN 211136948U), patent No. ZL202120928057.3 (grant notice No. CN 216883710U), and the like. However, the following problems are easily caused while achieving tool head replacement: (1) inconvenient replacement of different tool heads; (2) the tool head is not firmly connected with the handle, so that the use is affected.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide a hand tool which is convenient to use, has a replaceable tool head, and is convenient to replace.

The second technical problem to be solved by the present utility model is to provide a hand tool which is convenient to use, has a replaceable tool head and is firmly installed.

The utility model solves at least one of the technical problems by adopting the following technical proposal: a hand tool convenient to use, including handle and tool head, its characterized in that still includes:

the mounting piece is columnar in shape, the first end of the mounting piece is used for being detachably connected with the handle, and the second end of the mounting piece is used for detachably mounting the tool head;

the locking piece is detachably connected with the mounting piece, and the locking piece and the mounting piece can move relatively along the length direction of the mounting piece;

in the process that the first end of the mounting piece is connected with the handle, the locking piece and the mounting piece relatively move towards a first direction, and the locking piece locks the mounting piece and the tool head;

and in the process of disassembling the first end of the mounting piece and the handle, the locking piece and the mounting piece relatively move towards the second direction, and the locking piece unlocks the mounting piece and the tool head.

Furthermore, the appearance of the mounting piece is cylindrical, and the second end of the mounting piece is provided with a slot for inserting the tool head along the length direction, so that the tool head and the mounting piece can be detachably mounted through the insertion of the tool head and the slot; the locking piece is a sleeve sleeved on the mounting piece and matched with the second end of the mounting piece in size, and in a state that the first end of the mounting piece is connected with the handle in place, the locking piece is relatively stopped with the mounting piece, the locking piece enables the tool head to be tightly matched with the slot of the mounting piece, namely, the locking of the tool head and the mounting piece is realized, and when the first end of the mounting piece is connected with the handle in place, the mounting piece is stopped backwards by the handle, namely, the front and rear limiting of the mounting piece is realized.

Further, the volume of the slot is variable, and the volume can be increased by the insertion and extrusion of the tool bit during the insertion of the tool bit, and the volume can be reduced by the internal pressure of the locking member during the relative movement of the locking member and the mounting member in the first direction. The volume of the slot is changeable, so that the hand tool can be matched with more different tool heads, the tight fit between the tool head and the slot can be realized by reducing the volume of the slot through internal pressure, and further, the locking of the tool head and the mounting piece is realized, and the locking mode is simple and reliable.

Further, the second end of the mounting member is divided into at least two blocks, each block extends along the length direction of the mounting member, and a gap is formed between adjacent blocks to form the slot, so that a slot structure can be preferably formed on the mounting member, and the utility model is particularly suitable for tool heads with flat plate-shaped connecting ends. When the tool head is inserted into the slot and the volume of the connecting end of the tool head is larger than the corresponding position of the slot, all blocks of the slot are unfolded from inside to outside synchronously, so that the volume of the slot is increased, the size of the slot is suitable for the insertion of the tool head with corresponding specification, and all blocks of the slot are synchronously assembled from outside to inside in the relative movement process of the locking piece and the mounting piece towards the first direction, so that the tool head is tightly matched with the slot, the tool head is locked, and the tool head is prevented from falling off from the slot.

Further, in the locking state of the tool head and the mounting piece, the end part of the second end of the mounting piece protrudes outwards from the locking piece, and the volume of the slot part corresponding to the protruding part is larger than that of other parts of the slot. This makes the present utility model applicable to a tool head having a flat plate-like shape with a large width at the connection end.

Further, the outer diameter of the second end of the mounting member increases from back to front, while the inner diameter of the front end of the locking member increases from back to front, and the two members are matched. Therefore, when the mounting piece is arranged along the axial fixation, and the locking piece moves forwards towards the second end of the mounting piece, or the locking piece is arranged along the axial fixation, and when the mounting piece moves backwards towards the rear end of the locking piece, the two pieces can be matched to inwards compress each block of the slot, so that tight fit between the connecting end of the tool head and the slot is better realized.

Further, the shape of the handle is cylindrical, the first end of the mounting piece and the corresponding end of the handle are in threaded connection with each other by taking a straight line where the central axes of the first end and the corresponding end of the mounting piece are located as a center, and the locking piece and the handle are axially limited. The mounting piece and the locking piece can axially move relative to the locking piece in the process of being in threaded connection with the handle, so that the locking piece can lock and unlock the mounting piece and the tool head.

Further, in the state that the locking piece is sleeved with the mounting piece, the locking piece and the mounting piece are radially limited through the limiting component. The locking piece is sleeved outside the mounting piece, so that the mounting piece and the handle can be disassembled and assembled by rotating the locking piece, and the tool head is more convenient to lock and unlock.

Further, the limiting assembly comprises a limiting sliding groove and a limiting sliding strip, wherein the limiting sliding groove is arranged in the inner peripheral surface of the locking piece and the outer peripheral surface of the mounting piece, the limiting sliding strip is arranged on one of the limiting sliding grooves and the other limiting sliding strip, the limiting sliding strip axially extends and axially penetrates through the limiting sliding groove, and the limiting sliding strip is embedded in the limiting sliding groove and can slide back and forth along the limiting sliding groove in a state that the locking piece is sleeved with the mounting piece. Through the cooperation of spacing spout and spacing draw runner, not only can realize the radial spacing of locking piece and installed part, can guide the axial displacement of installed part for the locking piece moreover to further improve the reliability to the tool head locking.

Further, the handle includes a tube body for holding by the hand, a first end of the tube body is inserted into the first end of the mounting member, and the first end of the mounting member is screwed with the handle with an axis of the two as a center. Therefore, the connection reliability of the first end of the mounting piece and the handle can be ensured on the basis of realizing the detachable connection of the first end of the mounting piece and the handle.

Further, a connector for threaded connection with the first end of the mounting member is mounted in the first end of the tube. Thereby facilitating the threaded connection of the locking member to the handle.

Further, the connecting piece is a connecting sleeve embedded in the first end of the pipe body along the length direction, a first internal thread is arranged on the inner surface of the connecting sleeve, an external thread which can be in threaded connection with the first internal thread is arranged on the outer surface of the first end of the mounting piece, and thus the threaded connection between the mounting piece and the handle can be realized through the threaded connection between the connecting sleeve and the mounting piece.

Further, the connecting piece is a connecting rod inserted into the first end of the pipe body along the length direction, one end face of the connecting rod is concaved inwards along the length direction, a second internal thread is arranged on the inner surface of the concave part, and an external thread which can be in threaded connection with the second internal thread is arranged on the outer surface of the first end of the mounting piece. Thus, the threaded connection between the mounting piece and the handle can be realized through the threaded connection between the connecting rod and the mounting piece.

Further, the handle includes a tube body for holding by the hand, a first end of the tube body is inserted into the first end of the mounting member, and a tail plug is packaged in a tube mouth of the second end. Therefore, the internal structure of the handle is firm, and foreign matters can be prevented from entering the handle.

Further, the handle further comprises a tail plug which is encapsulated in the pipe orifice at the two ends of the Guan Tidi, the tail plug is in a cap shape which is opened inwards, and the other end of the connecting rod is inserted into the tail plug. On the one hand, the internal structure of the handle is firm, foreign matters can be prevented from entering the handle, and on the other hand, the connecting rod can be stably installed in the pipe body.

Further, a protective cover is attached to the free end of the mounting member, and the tool bit is covered in the protective cover. The tool head can be protected on one hand, and the user can be prevented from being injured by the tool head on the other hand, and the tool head is especially suitable for knife tools.

Compared with the prior art, the utility model has the advantages that: the handle is provided with the mounting part, and the tool head can be detachably mounted on the second end of the mounting part, so that the tool head is replaced, different tool heads are mounted on the same handle, and the tool head is only required to be detached from the mounting part during replacement, so that the tool head is convenient to replace.

In addition, can lock instrument head and installed part through the locking piece to guarantee hand tool's normal use, and, the first end of installed part can be dismantled with the handle and be connected, and can realize locking piece to the locking of instrument head and installed part and unblock through the dismouting of first end of installed part and handle, so not only make things convenient for the dismouting of installed part and handle, be convenient for realize locking and unblock operation to the instrument head moreover, convenient operation promotes user's use experience greatly.

Drawings

FIG. 1 is a schematic view of a hand tool according to embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view of the hand tool of example 1 of the present utility model;

FIG. 3 is a schematic view of a part of the hand tool of embodiment 1 of the present utility model (with the protective cover hidden);

FIG. 4 is an exploded view of the hand tool of example 1 of the present utility model;

FIG. 5 is a schematic view of the structure of FIG. 4 in another direction;

FIG. 6 is a schematic view of the structure of the hand tool according to embodiment 2 of the present utility model;

FIG. 7 is a cross-sectional view of the hand tool of example 2 of the present utility model;

FIG. 8 is a cross-sectional view of the hand tool of example 2 of the present utility model in another direction;

FIG. 9 is an exploded view of a portion of a hand tool of example 2 of the present utility model;

FIG. 10 is a cross-sectional view of the hand tool of example 2 of the present utility model in yet another orientation;

FIG. 11 is an exploded view of another part of the hand tool of example 2 of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Example 1:

as shown in fig. 1 to 5, a handtool convenient to use comprises a handle 1, a tool head 2, a mounting member 3 and a locking member 4. Wherein, the outer shape of the mounting member 3 is columnar, and a first end (specifically, a rear end in the present embodiment) thereof is detachably connected to the handle 1, and a second end (specifically, a front end in the present embodiment) thereof is used for detachably mounting the tool head 2.

Further, the fixing member 3 is detachably connected to the above-mentioned fixing member 3, and both are relatively movable in the longitudinal direction of the fixing member 3. In the process that the first end of the mounting member 3 is connected with the handle 1, the locking member 4 and the mounting member 3 relatively move towards the first direction, and the locking member 4 locks the mounting member 3 and the tool head 2; and the locking member 4 and the mounting member 3 relatively move in the second direction during the process of detaching the first end of the mounting member 3 from the handle 1, and the locking member 4 unlocks the mounting member 3 and the tool bit 2.

In the utility model, the mounting piece 3 is arranged on the handle 1, and the tool head 2 can be detachably mounted on the second end of the mounting piece 3, so that the tool head 2 can be replaced, different tool heads 2 are mounted on the same handle 1, and the tool head 2 is only required to be detached from the mounting piece 3 during replacement, so that the tool head 2 is convenient to replace. In addition, can lock instrument head 2 and installed part 3 through locking piece 4 to guarantee hand tool's normal use, and, the first end of installed part 3 can be dismantled with handle 1 and be connected, and can realize locking piece 4 to instrument head 2 and the locking of installed part 3 and unblock through the dismouting of installed part 3 and handle 1, so not only make things convenient for the dismouting of installed part 3 and handle 1, be convenient for realize locking and unblock operation to instrument head 2 moreover, convenient operation promotes user's user experience greatly.

Further, in this embodiment, the outer shape of the mounting member 3 is cylindrical, and the second end thereof is provided with a slot 30 along the length direction into which the connection end of the tool bit 2 is inserted. In this way, the tool head 2 and the mounting piece 3 can be detachably mounted through the insertion of the tool head 2 and the slot 30. Specifically, the locking member 4 is a sleeve sleeved on the mounting member 3 and matched with the second end of the mounting member 3 in size, and in a state that the first end of the mounting member 3 is connected with the handle 1 in place, the locking member 4 is stopped relatively to the mounting member 3, and the locking member 4 tightly fits the tool head 2 with the slot 30 of the mounting member 3, that is, the locking member 4 locks the tool head 2 and the mounting member 3.

Preferably, the volume of the slot 30 is variable, and the slot 30 is pushed out by the tool bit 2 during the insertion of the tool bit 2 to increase the volume, and the slot 30 is pushed in by the locking member 4 to decrease the volume during the relative movement of the locking member 4 and the mounting member 3 in the first direction. The volume of the slot 30 is variable, so that the hand tool can be matched with more different tool heads 2, the tight fit of the tool heads 2 and the slot 30 can be realized by reducing the volume of the slot 30 through internal pressure, and further, the locking of the tool heads 2 and the mounting piece 3 is realized, and the locking mode is simple and reliable.

In this embodiment, in order to form the slot 30 structure on the mounting member 3, the second end of the mounting member 3 is divided into at least two blocks 31, each block 31 extends along the length direction of the mounting member 3, and gaps are formed between adjacent blocks 31 to form the slot 30, so that the present utility model is particularly suitable for the tool head 2 with a flat plate-shaped connecting end. When the tool bit 2 is inserted into the slot 30 and the volume of the connecting end of the tool bit 2 is larger than the corresponding position of the slot 30, the blocks 31 of the slot 30 are synchronously unfolded from inside to outside, so that the volume of the slot 30 is increased and the size of the slot is suitable for the insertion of the tool bit 2 with corresponding specification, and the blocks 31 of the slot 30 are synchronously assembled from outside to inside in the process of relatively moving the locking piece 4 and the mounting piece 3 towards the first direction, so that the tool bit 2 is tightly matched with the slot 30, the locking of the tool bit 2 is realized, and the tool bit 2 is prevented from falling off from the slot 30. Specifically, in the present embodiment, the second end of the mounting member 3 is divided into four blocks, that is, four blocks 31, and the cross section of the slot 30 is cross-shaped. Of course, the hand tool of the present utility model is also applicable to the tool head 2 having the connecting end as the column member, except for the tool head 2 having the plate member, and the connecting end of the tool head 2 may be inserted into the center of the slot 30.

Preferably, in the locked state of the tool bit 2 and the mounting member 3, the end portion of the second end of the mounting member 3 protrudes out of the locking member 4, and the volume of the portion of the slot 30 corresponding to the protruding portion is larger than that of the other portion of the slot 30. This makes it possible to apply the present utility model to a tool head 2 having a flat plate-like shape with a wide connecting end. Further, the outer diameter of the second end of the mounting member 3 increases from back to front, while the inner diameter of the front end of the locking member 4 increases from back to front, and the two are matched. It can be seen that, in the present utility model, when the mounting member 3 is fixedly disposed along the axial direction and the locking member 4 moves toward the second end of the mounting member 3, or the locking member 4 is fixedly disposed along the axial direction and the mounting member 3 moves toward the rear end of the locking member 4, the two cooperate to press each block 31 of the slot 30 inwards, so that the tight fit between the connection end of the tool bit 2 and the slot 30 is better achieved, so that the tool bit 2 is locked, and conversely, the tool bit 2 is unlocked.

Further, in this embodiment, the outer shape of the handle 1 is cylindrical, the first end of the mounting member 3 and the corresponding end of the handle 1 are screwed with each other with the straight line of the central axes of the two as the center, and the locking member 4 and the handle 1 are axially limited (in this embodiment, axial limitation is achieved by a snap-in manner, as shown in fig. 2). It can be seen that in this embodiment, the locking member 4 is axially fixed relative to the mounting member, and the mounting member can be axially moved relative to the locking member 4 by being screwed with the handle 1, so that the locking member 4 can unlock and lock the tool bit 2. Specifically, when the mount 3 moves in the rear end direction of the lock 4 (i.e., the first direction in the present embodiment), the lock 4 locks the mount 3 with the tool bit; and when the mount 3 moves in the front end direction of the lock 4 (i.e., the second direction in the present embodiment), the lock 4 unlocks the mount 3 from the tool head 2.

There are various specific ways of screwing the first end of the mounting member 3 to the handle 1, for example, a connecting groove extending along the length direction of the handle 1 is formed by a hollow and open end of the handle 1, and a screw thread for screwing the mounting member 3 is provided on the inner surface of the connecting groove. In this embodiment, the handle 1 preferably includes a tube 11 for holding by a hand, and a first end of the tube 11 is inserted into and screwed with a first end of the mounting member 3, so that the handle 1 is simple in structure and convenient to manufacture. Further, a connecting member for screw-coupling with the first end of the mounting member 3 is installed in the first end of the pipe body 11. In this embodiment, the connecting member is specifically a connecting rod 5 inserted into the first end of the pipe body 11 along the length direction, one end surface of the connecting rod 5 is concaved inward along the length direction and is provided with a second internal thread 51 on the inner surface of the concave portion, and the outer surface of the first end of the mounting member 3 is provided with an external thread 33 capable of forming a threaded connection with the second internal thread 51, as shown in fig. 5. Thus, the threaded connection of the mounting piece 3 and the handle 1 can be realized through the threaded connection of the connecting rod 5 and the mounting piece 3.

In this embodiment, as shown in fig. 2, 4 and 5, a tail plug 12 is enclosed in the pipe orifice at the other end of the pipe body 11, the tail plug 12 is in the shape of a cap opening inward, and the other end of the connecting rod 5 is inserted into the tail plug 12. On the one hand, the internal structure of the handle 1 can be firm, foreign matters can be prevented from entering the handle 1, and on the other hand, the connecting rod 5 can be stably installed in the pipe body 11. A protective cover 6 is attached to the free end of the attachment 3, and the tool bit 2 is covered by the protective cover 6. The tool head 2 can be protected on the one hand, and the user can be prevented from being injured by the tool head 2 on the other hand, especially for the cutter type tool head 2.

Example 2:

as shown in fig. 6 to 11, unlike the embodiment 1, in the present embodiment, the connecting member is a connecting sleeve 7 fitted into a first end of the pipe body 11 in a longitudinal direction, a first female screw 71 is provided on an inner surface of the connecting sleeve 7, and the male screw 33 capable of forming a screw connection with the first female screw 71 is provided on an outer surface of the first end of the mounting member 3, so that the screw connection of the mounting member 3 and the handle 1 can be achieved by screw connection of the connecting sleeve 7 and the mounting member 3, as shown in fig. 7. In order to more firmly install the connecting sleeve 7 in the pipe body 11, in this embodiment, as shown in fig. 8 and 9, a limiting convex ring 72 is protruding on the outer circumferential surface of the front end of the connecting sleeve 7 along the circumferential direction, and a limiting ring groove 111 for the limiting convex ring 72 to be clamped in is recessed on the inner circumferential surface of the first end of the pipe body 11. Simultaneously, the outer peripheral surface of the connecting sleeve 7 is convexly provided with limiting ribs 73 extending axially along the circumferential direction at intervals, the inner peripheral surface of the first end of the pipe body 11 is concavely provided with limiting grooves 113 which are in one-to-one correspondence with the limiting ribs 73, and each limiting groove 113 extends along the axial direction of the pipe body 11 and is used for clamping the corresponding limiting rib 73.

Further, in this embodiment, in the state where the locking member 4 is sleeved with the mounting member 3, both are radially limited by the limiting assembly 8. The locking piece 4 is sleeved outside the mounting piece 3, so that the mounting piece 3 and the handle 1 can be dismounted by rotating the locking piece 4 by radially limiting the mounting piece and the handle, and the use is more convenient.

Further, as shown in fig. 10 and 11, the above-mentioned limit assembly 8 includes a limit slide groove 81 provided on one of the inner peripheral surface of the locking member 4 and the outer peripheral surface of the mounting member 3, and a limit slide bar 82 provided on the other, the limit slide bar 82 extending axially and the limit slide groove 81 penetrating axially, and the limit slide bar 82 being fitted in the limit slide groove 81 and being capable of sliding back and forth along the limit slide groove 81 in a state in which the locking member 4 is coupled with the mounting member 3. Through the cooperation of the limiting sliding groove 81 and the limiting sliding bar 82, not only can the radial limiting of the locking piece 4 and the mounting piece 3 be realized, but also the axial movement of the mounting piece 3 relative to the locking piece 4 can be guided, so that the reliability of locking the tool head 2 is further improved.

In this embodiment, specifically, the limiting sliding grooves 81 are all disposed on the inner peripheral surface of the locking member 4 at intervals along the circumferential direction, and the limiting sliding grooves 81 are four, and the limiting sliding strips 82 are convexly disposed on the outer peripheral surface of the first end of the mounting member 3 at intervals along the circumferential direction and are in one-to-one correspondence with the limiting sliding grooves 81.

Claims (16)

1. A hand tool convenient to use, comprising a handle (1) and a tool head (2), characterized in that it further comprises:

a mounting member (3) having a columnar shape and a first end for detachably connecting with the handle (1) and a second end for detachably mounting the tool bit (2);

the locking piece (4) is detachably connected with the mounting piece (3), and the locking piece and the mounting piece can relatively move along the length direction of the mounting piece (3);

in the process that the first end of the mounting piece (3) is connected with the handle (1), the locking piece (4) and the mounting piece (3) relatively move towards a first direction, and the locking piece (4) locks the mounting piece (3) and the tool head (2);

in the process of detaching the first end of the mounting piece (3) from the handle (1), the locking piece (4) and the mounting piece (3) relatively move towards the second direction, and the locking piece (4) unlocks the mounting piece (3) and the tool head (2).

2. The hand tool according to claim 1, wherein the mounting member (3) is cylindrical in shape and has a slot (30) for inserting the tool bit (2) in the second end along the length direction, the locking member (4) is a sleeve which is sleeved on the mounting member (3) and is matched with the second end of the mounting member (3),

in a state where the first end of the attachment member (3) is connected to the handle (1), the locking member (4) is stopped against the attachment member (3), and the locking member (4) tightly engages the tool bit (2) with the insertion groove (30) of the attachment member (3).

3. A hand tool according to claim 2, characterized in that the volume of the socket (30) is variable and that the socket (30) is pressed out by the tool head (2) during insertion of the tool head (2) and its volume increases, whereas the socket (30) is pressed in by the locking element (4) and its volume decreases during relative movement of the locking element (4) and the mounting element (3) in the first direction.

4. A hand tool for convenient use according to claim 3, wherein the second end of the mounting member (3) is divided into at least two blocks (31), each block (31) extending along the length of the mounting member (3) and forming a gap between adjacent blocks (31) to form the slot (30),

when the tool head (2) is inserted into the slot (30) and the volume of the connecting end of the tool head (2) is larger than the corresponding position of the slot (30), all the blocks (31) of the slot (30) are synchronously unfolded from inside to outside, and all the blocks (31) of the slot (30) are synchronously gathered from outside to inside in the process that the locking piece (4) and the mounting piece (3) relatively move towards the first direction.

5. A hand tool according to any one of claims 2-4, wherein the second end of the mounting member (3) protrudes beyond the locking member (4) in a locked condition of the tool head (2) and the mounting member (3), and the volume of the portion of the socket (30) corresponding to the protruding portion is larger than the other portion of the socket (30).

6. A hand tool for convenient use according to claim 5, wherein the outer diameter of the second end of the mounting member (3) increases from back to front and the inner diameter of the front end of the locking member (4) increases from back to front, both being internally and externally matched.

7. A hand tool according to any one of claims 2-4, wherein the handle (1) is cylindrical in shape, the first end of the mounting member (3) is screwed with the corresponding end of the handle (1) about a straight line of the central axes of the two, and the locking member (4) is axially limited to the handle (1).

8. A handtool according to claim 7, wherein the locking member (4) is radially retained by the retaining assembly (8) in a sleeved condition with the mounting member (3).

9. The hand tool according to claim 8, wherein the limiting assembly (8) comprises a limiting sliding groove (81) arranged on one of the inner circumferential surface of the locking member (4) and the outer circumferential surface of the mounting member (3) and a limiting sliding bar (82) arranged on the other, the limiting sliding bar (82) axially extends and the limiting sliding groove (81) axially penetrates, and the limiting sliding bar (82) is embedded in the limiting sliding groove (81) and can slide back and forth along the limiting sliding groove (81) in a state that the locking member (4) is sleeved with the mounting member (3).

10. A hand tool for use according to claim 7, wherein the handle (1) comprises a tubular body (11) for hand gripping, a first end of the tubular body (11) being inserted into and screwed with a first end of the mounting member (3).

11. A handtool for use according to claim 10, wherein the first end of the tube (11) has a connector mounted therein for threaded connection with the first end of the mounting member (3).

12. A hand tool according to claim 11, characterized in that the coupling member is a coupling sleeve (7) which is fitted in the first end of the tubular body (11) in the longitudinal direction, the inner surface of the coupling sleeve (7) being provided with a first internal thread (71), and the outer surface of the first end of the mounting member (3) being provided with an external thread (33) which is in threaded connection with the first internal thread (71).

13. A hand tool according to claim 11, characterized in that the connecting member is a connecting rod (5) inserted in the first end of the pipe body (11) in the length direction, one end face of the connecting rod (5) is recessed in the length direction and provided with a second internal thread (51) on the inner surface of the recess, and the outer surface of the first end of the mounting member (3) is provided with an external thread (33) capable of forming a threaded connection with the second internal thread (51).

14. A hand tool for convenient use according to any one of claims 1 to 4, wherein the handle (1) comprises a tubular body (11) for hand grip, a first end of the tubular body (11) being inserted into a first end of the mounting member (3) and a second end of the tubular body having a plug (12) enclosed therein.

15. A hand tool for convenient use as claimed in claim 13, wherein said handle (1) further comprises a tail plug (12) enclosed in a mouth of said second end of said tubular body (11), said tail plug (12) being in the form of an inwardly open cap, and the other end of said connecting rod (5) being inserted in said tail plug (12).

16. A hand tool according to any one of claims 1-4, characterized in that the free end of the mounting member (3) is covered with a protective cover (6), and that the tool head (2) is covered in the protective cover (6).