Improved structure of handling tool

Abstract

The utility model provides an improved structure of a handling tool, which comprises a tool outer seat, a tool inner seat and a handle, the pushing shaft sleeve is in clearance fit with the mounting hole, and a nesting hole is vertically formed in the middle of the pushing shaft sleeve in a penetrating mode; a spring used for elastic supporting is arranged between the mandrel piece and the bottom of the pushing shaft sleeve and used for positioning all core assemblies of the handle; the core shaft part comprises a core shaft main body, a positioning column and an extension shaft, the core shaft main body is in clearance fit with the nesting hole, the positioning column is coaxially and detachably arranged at the upper end of the core shaft main body, and the extension shaft is coaxially and detachably arranged at the lower end of the core shaft main body. The universality, the assembly efficiency and the operation convenience of handling assembly are remarkably improved, and meanwhile the production cost and the failure rate in the assembly process can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tooling structure, in particular to a handle tooling improved structure. BACKGROUND

[0002] The handle (or called handle) is a key component on the door panel, mainly used for facilitating the user to manually operate the opening and closing of the door. The handle design forms on the current market are various, especially in the design of the handle and the panel, each has its own characteristics, and the core components (such as the snap spring, the angular limit stopper, the torsion spring and the gasket) tend to be standardized.

[0003] However, the assembly process of the traditional handle has certain limitations. The traditional assembly process usually requires manually placing the handle handle on a specially designed positioning tool, then gradually adding intermediate components, and finally installing the snap spring. This assembly method requires that each different model of handle must be equipped with a special positioning tool, resulting in a lack of versatility of the tooling equipment, which is difficult to adapt to the diversified handle models on the market.

[0004] To solve the above problems, the applicant previously proposed a tooling design scheme with strong versatility, such as the tooling, pressing mechanism and equidistant circulating assembly disclosed in Chinese Patent No. CN118848516A. The scheme significantly simplifies the assembly process of the handle by simplifying the mechanism design, and improves the versatility of the tooling, so that it can adapt to handles of different designs and sizes.

[0005] However, the scheme still has the following problems in actual application:

[0006] Firstly, the main body and the positioning column of the mandrel are of an integral structure, which is difficult to process, and when adapting to handles of different models, the entire mandrel needs to be replaced, increasing the production cost and operation complexity.

[0007] Secondly, the mandrel and the push shaft sleeve are connected by a spring, and the mandrel will press down the spring under the action of its own weight, causing a certain amount of sinking. Therefore, an additional cylinder jack needs to be used for support during the assembly process, increasing the complexity of the equipment and the inconvenience of the operation.

[0008] Therefore, the present inventors have specially designed a handle tooling improved structure, which gives rise to the present case. CONTENT OF THE UTILITY MODEL

[0009] To solve the above problems, the technical scheme of the utility model is as follows:

[0010] A handle tooling improved structure, comprising:

[0011] A tooling outer seat is provided with an installation hole in the vertical direction;

[0012] The push shaft sleeve is matched with the installation hole gap, and a nesting hole is vertically formed in the middle part;

[0013] The core shaft part is provided with a spring for elastic support between the push shaft sleeve bottom and each core component for positioning the handle.

[0014] The core shaft part includes a core shaft body matched with the nesting hole gap, a positioning column coaxially and detachably arranged on the upper end of the core shaft body, and an extension shaft coaxially and detachably arranged on the lower end of the core shaft body.

[0015] Preferably, a positioning groove is formed in the upper end of the core shaft body along the axial direction, the positioning column is embedded in the positioning groove above the core shaft body and has a protruding part protruding from the upper end surface of the core shaft body, and the positioning column and the positioning groove are connected and fixed by a column part in sequence.

[0016] Preferably, the extension shaft is embedded in the positioning groove below the core shaft body and has a protruding part protruding from the lower end surface of the core shaft body, and the extension shaft and the positioning groove are connected and fixed by another column part in sequence.

[0017] Preferably, a pair of first limiting holes penetrating to the nesting hole are arranged on the inner walls of the two opposite sides of the positioning groove along the radial direction, the first limiting holes are distributed along the axial direction of the core shaft body, and the installation positions of the first connecting pin shaft and the second connecting pin shaft are located on the upper and lower sides of the first limiting hole, respectively.

[0018] Preferably, an annular limiting ring surface is formed at the bottom position of the nesting hole in the push shaft sleeve, the spring is arranged between the limiting ring surface and the core shaft body, the extension shaft passes through the middle part of the spring, and the center of the limiting ring surface forms a notch groove opposite to the position of the extension shaft.

[0019] Preferably, the extension length of the extension shaft is designed such that, when the core shaft part is in the highest initial position and the push shaft sleeve is in the lowest initial position, the lower end of the extension shaft is flush with or opposite to the bottom of the notch groove.

[0020] Preferably, the cross section of the installation hole is column-shaped, triangular, square or petal-shaped.

[0021] Preferably, the positioning column and the extension shaft are both square rods with square cross sections.

[0022] Preferably, the upper end of the core shaft body is recessed downward to form a recess, and the recess covers the positioning groove.

[0023] Preferably, the upper end face of the tool outer seat is convexly provided with a positioning structure for positioning the handle inner cover or face cover, the positioning structure comprises a limiting ring distributed in a ring shape and a limiting structure for limiting the circumferential rotation of the inner cover or face cover, and the limiting structure is a positioning face opened on the limiting ring or a convex structure convexly provided on the upper end face of the tool outer seat.

[0024] The utility model discloses the beneficial effects are as follows:

[0025] The utility model discloses a detachable connecting structure is designed to the main body, positioning column and extension shaft of the mandrel piece, the processing difficulty of mandrel piece is reduced obviously, simultaneously, for different models handle, only need to replace positioning column can realize adaptation, do not need to replace whole mandrel piece, the versatility and assembly efficiency of tool are improved greatly, and production cost is reduced.

[0026] In addition, the extension shaft is additionally arranged at the lower end of the mandrel main body, so that the mandrel piece is stably supported in normal state, the sinking problem of the mandrel piece caused by self-weight is avoided, a cylinder jacking rod is not needed to be additionally used, the equipment structure is simplified, and the operation convenience is improved.

[0027] Particularly, the accommodation slot is arranged at the upper end of the mandrel main body, so that the gap between the handle and the upper end face of the mandrel main body caused by burrs or unevenness at the lower end of the handle is effectively avoided. The design prevents small parts (such as a snap spring) from falling into the gap during assembly, and further improves the stability and reliability of handle assembly.

[0028] In summary, the utility model discloses the versatility, assembly efficiency and operation convenience of handle tool are improved obviously through modular design, extension shaft support and accommodation slot optimization, and production cost and failure rate in the assembly process can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model. The illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.

[0030] Among them:

[0031] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0032] Figure 2 It is the explosion structure schematic diagram of the utility model;

[0033] Figure 3 It is the sectional structure schematic diagram of the utility model;

[0034] Figure 4 It is the three-dimensional structure schematic diagram of the mandrel piece in the utility model;

[0035] Figure 5 is the cross-section structure schematic view of the mandrel in the utility model;

[0036] Figure 6 is the explosion structure schematic view of the mandrel in the utility model;

[0037] Figure 7 is the explosion structure schematic view of the handle in the prior art;

[0038] Figure 8 is the local explosion structure schematic view of the assembly relation of the limiting structure of the fitting surface of the convex inner cover and the tooling outer seat in the utility model;

[0039] Figure 9 is the local explosion structure schematic view of the assembly relation of the limiting structure of the positioning hole of the convex inner cover and the tooling outer seat in the utility model;

[0040] Figure 10 is the local explosion structure schematic view of the assembly relation of the limiting structure of the plug-in hole of the convex inner cover and the tooling outer seat in the utility model.

[0041] Label explanation:

[0042] 10, handle; 11, handle; 111, rotating shaft end; 112, mandrel hole; 113, limiting groove; 114, limiting ring groove; 12, shaft sleeve; 13, inner cover; 131, fitting surface; 132, positioning hole; 133, plug-in hole; 14, gasket; 15, torsional spring; 16, angular limiting clamping block; 17, clamping spring; 20, tooling outer seat; 21, mounting hole; 22, limiting ring; 23, limiting structure; 30, pushing shaft sleeve; 31, nested hole; 311, limiting ring surface; 312, notch groove; 40, mandrel; 41, mandrel main body; 411, first limiting hole; 412, giving way groove; 413, pre-limiting groove; 414, positioning groove; 42, positioning column; 43, extension shaft; 44, first connecting pin shaft; 45, first pin shaft hole; 46, first through shaft hole; 47, second connecting pin shaft; 48, second pin shaft hole; 49, second through shaft hole; 50, spring. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical schemes and beneficial effects to be solved in the utility model more clear and obvious, the utility model is further described in detail in the following with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0044] In the prior art, such as Figure 7As shown, the handle 10 generally comprises a handle 11, a shaft sleeve 12, an inner cover 13 (or a face cover), a gasket 14, a torsion spring 15, an angular limiting block 16, and a snap spring 17. The handle 11 has a 90°-bent cylindrical rotating shaft end 111 at an end thereof. A square-shaped core shaft hole 112 is generally formed in the middle of the rotating shaft end 111. A pair of U-shaped opening limiting grooves 113 are formed on both sides of the core shaft hole 112 and along the radial direction of the rotating shaft end 111. A limiting ring groove 114 is arranged around the circumferential direction of the rotating shaft end 111 at a side thereof away from the handle 11. The snap spring 17 is clamped into the limiting ring groove 114, and the outer side of the snap spring 17 is used to stop and limit other parts.

[0045] The present application will be described in detail through the specific embodiments as follows: Embodiment 1

[0046] Please refer to Figures 1 to 10 , which is a handle tool improvement structure as the best embodiment of the present application, comprising a tool outer seat 20, a pushing shaft sleeve 30, and a core shaft piece 40, wherein:

[0047] The tool outer seat 20 is a positioning base for combining the tool with other installation surfaces. An installation hole 21 is vertically and throughly arranged in the tool outer seat 20. The shape of the tool outer seat 20 can be stretched into various shapes, such as a rectangular or circular or elliptical or a rectangular stretched three-dimensional structure with rounded corners and right angle transitions. The installation hole 21 is specifically arranged in the stretching direction of the whole tool outer seat 20, and the stretching center is appropriate, which is convenient for setting and forming a region for placing the shaft sleeve 12, the inner cover 13 or the face cover, the gasket 14, the torsion spring 15, the angular limiting block 16, and the snap spring 17, etc. on the rotating shaft end 111 of the handle. In the present embodiment, the tool outer seat 20 is a square block structure with a rectangular cross-section with rounded corner transitions, and the installation hole 21 is distributed along the vertical center axis of the tool outer seat 20.

[0048] In the present embodiment, the shape of the installation hole 21 is cylindrical, so that the cross-sectional shape is circular. In some other embodiments, the shape of the installation hole 21 can also be designed into other forms, so that the cross-sectional shape is triangular, square, or petal-shaped, etc. Only the characteristics of straight line distribution are required, so that the subsequent pushing shaft sleeve 30 can smoothly realize the extension and contraction along the distribution path.

[0049] The push shaft sleeve 30 is in clearance fit with the mounting hole 21, a circular- sectioned nesting hole 31 is vertically formed in the middle part of the push shaft sleeve 30, so that the sliding of the push shaft sleeve 30 along the mounting hole 21 is smoother, the mounting hole 21 is correspondingly provided in the form of a circular hole which is adapted to the external shape of the push shaft sleeve 30, in order to facilitate the pushing of the push shaft sleeve 30 to the shaft sleeve 12, the inner cover 13 or the face cover, the gasket 14, the torsional spring 15, the angular limiting clamping block 16 and the clamping spring 17 and other accessories, the length of the push shaft sleeve 30 is greater than the extension length of the mounting hole 21, so that the lower end of the push shaft sleeve 30 penetrates out of the mounting hole 21, so as to connect other driving components and realize the automatic extension and contraction of the push shaft sleeve 30.

[0050] In the embodiment, the overall shape of the push shaft sleeve 30 is in the form of a cylinder which is adapted to the mounting hole 21, so as to match the shape of the mounting hole 21 and realize the purpose of up-down extension and contraction in the mounting hole 21, and the shape can also be changed according to the shape of the mounting hole 21 to adapt to the extension and contraction requirements.

[0051] The core shaft member 40 is provided with a spring 50 for elastic support between the bottom of the push shaft sleeve 30 and the core shaft member 40, which is used for positioning each core component of the handle.

[0052] Specifically, the core shaft member 40 includes a core shaft body 41 in clearance fit with the nesting hole 31, a positioning column 42 and an extension shaft 43, the core shaft body 41 is in clearance fit with the nesting hole 31, a positioning column 42 is protruded in the middle part of the upper end of the core shaft body 41 and can be embedded in the core shaft hole 112 of the end part of the handle 11, the positioning column 42 is in the form of a square column, a set of vertically distributed U-shaped pre-limiting grooves 413 are symmetrically arranged on the two radial sides of the core shaft body 41, the openings of the two pre-limiting grooves 413 are away from each other, and the positioning column 42 is in the form of a square column, so as to form the shape embedded in the core shaft hole 112 of the end part of the handle 11 and facilitate the insertion of the handle 11 into the positioning column 42 to realize fixation.

[0053] The positioning column 42 is coaxially and detachably arranged on the upper end of the core shaft body 41, and the extension shaft 43 is coaxially and detachably arranged on the lower end of the core shaft body 41.

[0054] Specifically, as shown in 4, 5 and 6, a positioning groove 414 in the form of a column is vertically formed in the upper end of the core shaft body 41, the positioning column 42 is embedded in the positioning groove 414 on the upper end of the core shaft body 41 and has a protruding part protruding from the upper end surface of the core shaft body 41, the positioning column 42 and the positioning groove 414 are connected and fixed by a columnar member in sequence, and in the embodiment, the columnar member is specifically a first connecting pin 44, which can also be replaced by a screw or a screw rod, which is not limited here.

[0055] The first pin shaft hole 45 is radially through the upper end of the positioning groove 414, and the first through shaft hole 46 is arranged on the positioning column 42 relative to the first pin shaft hole 45. The first connecting pin shaft 44 passes through the first pin shaft hole 45 and the first through shaft hole 46 in sequence to achieve the purpose of limiting and fixing the positioning column 42 on the upper end of the positioning groove 414. At this time, the upper end of the positioning column 42 protrudes from the top of the positioning groove 414, thereby forming a protruding part that can be inserted and matched with the handle shaft hole 112 of the handle. After the handle is inserted into the core shaft part 40, the end face of the rotating shaft end 111 is pressed against the upper end face of the core shaft body 41.

[0056] Preferably, as shown in Figure 5 、 6 , the extension shaft 43 is embedded in the positioning groove 414 below the core shaft body 41, and the lower end of the extension shaft 43 has a protruding part that protrudes from the lower end face of the core shaft body 41. The extension shaft 43 and the positioning groove 414 are connected and fixed by another columnar part in sequence. In the embodiment, the other columnar part is a second connecting pin shaft 47, which can also be replaced by a screw or a screw rod, which is not limited here.

[0057] The second pin shaft hole 48 is radially through the lower end of the positioning groove 414 of the core shaft body 41, and the second through shaft hole 49 is arranged on the extension shaft 43 relative to the second pin shaft hole 48. The second connecting pin shaft 47 passes through the second pin shaft hole 48 and the second through shaft hole 49 in sequence to achieve the purpose of limiting and fixing the extension shaft 43 on the lower end of the positioning groove 414. At this time, the lower end of the extension shaft 43 protrudes from the bottom of the positioning groove 414, thereby forming a bottom support structure that can support the core shaft part 40 as a whole. When the tool outer base 20 is installed on other mounting surfaces, the extension shaft 43 can be extended to the bottom of the entire tool, which can conveniently achieve the pre-supporting of the core shaft part 40 without the need for additional use of a cylinder for supporting. At the same time, the use of the extension shaft 43 can also avoid the sinking problem between the core shaft part 40 and the pushing shaft sleeve 30.

[0058] Preferably, as shown in Figure 4 、 5 , 6, a pair of first limiting holes 411 that penetrate the nesting hole 31 are arranged on the inner walls of the two opposite sides of the positioning groove 414 along the axial direction of the core shaft body 41. The installation positions of the first connecting pin shaft 44 and the second connecting pin shaft 47 are respectively located on the upper and lower sides of the first limiting hole 411.

[0059] The first limiting hole 411 is used to cooperate with another hole on the push bushing 30 and the spring 50 to limit the vertical extension range of the push bushing 30 and the spindle 40 and to provide elastic support for the spindle 40. The above principle and process have been described in the patents targeted by the prior art, and will not be repeated here. By setting the first connecting pin 44 and the second connecting pin 47 on the upper and lower sides of the above position, the corresponding structure can be avoided, so that the overall detachable design of the spindle 40 is independent of the original structure and does not affect each other, thereby enhancing the overall stability of the structure.

[0060] Preferred, such as Figure 3 As shown, an annular limiting ring surface 311 is formed at the bottom position of the nested hole 31 inside the push bush 30. The spring 50 is located between the limiting ring surface 311 and the spindle body 41. The extension shaft 43 passes through the middle of the spring 50, and a notch 312 is formed at the center of the limiting ring surface 311 that is opposite to the position of the extension shaft 43.

[0061] Furthermore, the extension length of the extension shaft 43 is designed such that when the mandrel 40 is at its highest position and the push bushing 30 is at its lowest initial position, the lower end of the extension shaft 43 is flush with or relatively extends beyond the bottom of the notch 312. In this embodiment, it is specifically flush with the bottom.

[0062] Thus, through the above design, the limiting ring surface 311 serves as the bottom support of the spring 50, enabling the spring 50 to provide elastic support for the spindle body 41. Combined with the design of the extension shaft 43, the spindle body 41 can maintain a stable height under normal conditions, and will not press down on the spring 50 under its own weight, causing it to sink, thereby avoiding affecting the assembly process of the handle.

[0063] Preferably, the cross-section of the mounting hole 21 is cylindrical, triangular, square or petal-shaped. In this embodiment, it is specifically cylindrical, but it can also be changed to other shapes as needed.

[0064] Preferably, in this embodiment, both the positioning post 42 and the extension shaft 43 are square rods with a square cross-section.

[0065] Preferred, such as Figure 6 As shown, the upper end of the spindle body 41 is recessed downward to form a relief groove 412, which covers the positioning groove 414. The depth of the relief groove 412 is 1-2 mm, and in this embodiment it is 1 mm. Thus, by providing the relief groove 412 at the upper end of the spindle body 41, the gap between the handle 11 and the upper surface of the spindle body 41 due to burrs or unevenness at the lower end of the handle 11 is effectively avoided. This design prevents small parts (such as the retaining ring 17) from falling into the gap during assembly, further improving the stability and reliability of the handle assembly.

[0066] like Figure 8As shown, the upper end face of the tool outer seat 20 is provided with a positioning structure for positioning with the handle inner cover or face cover, the positioning structure comprises a limiting ring 22 distributed in a ring shape and a limiting structure 23 for limiting the circumferential rotation of the inner cover or face cover, and in the embodiment, the limiting structure 23 is a positioning face provided on the limiting ring.

[0067] Specifically, the positioning face is perpendicular to the diameter of the circumference where the limiting ring is located and is only formed by the wall surface of the limiting ring, and a corresponding matching face 131 is provided on the corresponding circumferential positioning groove in the inner side of the handle face cover or inner cover, and the limiting structure 23 is suitable for a circular cover. Embodiment 2

[0068] Please refer to Figures 9-10 The difference between the handle tool improvement structure of the embodiment two and the embodiment one is that the limiting structure 23 is a protruding structure provided on the upper end face of the tool outer seat.

[0069] Specifically, in the embodiment, the limiting structure 23 is a triangular protruding structure provided on the upper end face of the tool outer seat and located outside the limiting ring, and the shape thereof can be changed according to specific needs, and a positioning hole 132 which is suitable for the shape of the protruding structure and can be embedded with each other is formed on the inner side of the inner cover or face cover and located on the side of the circumferential positioning groove thereof by profiling, and the limiting structure 23 is suitable for a square cover, so that when the face cover or inner cover is positioned and inserted with the limiting ring 22 of the upper end face of the tool outer seat 20, the horizontal movement of the face cover or inner cover is limited by the limiting ring, and at the same time, the circumferential rotation of the face cover or inner cover is limited by the embedding of the protruding structure and the positioning hole 132, which facilitates the cooperation with other assembly mechanisms and the positioning and assembly of torsional springs, clamping springs, angular limiting pieces and other parts.

[0070] As Figure 10 shown, in some other embodiments, the protruding structure can also be designed inside the limiting ring, such as a positioning shaft, and a corresponding insertion hole 133 is provided on the inner cover or face cover, which can also achieve the above purpose.

[0071] In addition, the limiting ring 22 can also be a non-continuous ring structure, as long as it can limit the circumferential positioning groove in the inner side of the inner cover or face cover.

[0072] The beneficial effects of the utility model are as follows:

[0073] The utility model discloses a main body, positioning column 42 and extension shaft 43 of core shaft spare 40 are designed as detachable connection structure, the machining difficulty of core shaft spare 40 is reduced significantly, simultaneously, for different model handle, just need to replace positioning column 42 can realize adaptation, need not to replace whole core shaft spare 40, the universality and assembly efficiency of tooling have been improved greatly, reduced production cost,

[0074] In addition, the extension shaft 43 is additionally arranged at the lower end of the core shaft body 41, so that the core shaft spare 40 is stably supported in the normal state, the sinking problem of the core shaft spare 40 caused by the dead weight is avoided, the cylinder jacking rod is not needed to be additionally used, the equipment structure is simplified, and the operation convenience is improved.

[0075] In conclusion, the utility model discloses the modularization design, extension shaft 43 support and give way groove 412 optimization, the universality, assembly efficiency and operation convenience of handle tooling are improved significantly, and the production cost and failure rate in the assembly process can be reduced.

[0076] The utility model is described exemplarily above in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, as long as various non-essential improvements adopting the method concept and technical scheme of the utility model or directly applying the concept and technical scheme of the utility model to other occasions without improvement are all within the protection scope of the utility model.

Claims

1. An improved structure of a handle tool, comprising: a tool outer seat (20) provided with a mounting hole (21) vertically therethrough; a pushing shaft sleeve (30) in clearance fit with the mounting hole (21), and a nesting hole (31) vertically therethrough in the middle thereof; a mandrel (40) provided with a spring (50) for elastic support between the bottom of the pushing shaft sleeve (30) and the mandrel (40) for positioning each core component of the handle; characterized in that the mandrel (40) comprises a mandrel main body (41) in clearance fit with the nesting hole (31), a positioning column (42) coaxially and detachably arranged on the upper end of the mandrel main body (41), and an extension shaft (43) coaxially and detachably arranged on the lower end of the mandrel main body (41).

2. The handle assembly of claim 1 wherein: a positioning groove (414) is vertically provided through the upper end of the mandrel main body (41), the positioning column (42) is embedded in the positioning groove (414) above the mandrel main body (41) and has a protruding portion protruding from the upper end face of the mandrel main body (41) on the upper end thereof, and the positioning column (42) and the positioning groove (414) are connected and fixed by a columnar member in sequence through penetration.

3. The handle assembly of claim 2 wherein: the extension shaft (43) is embedded in the positioning groove (414) below the mandrel main body (41) and has a protruding portion protruding from the lower end face of the mandrel main body (41) on the lower end thereof, the extension shaft (43) and the positioning groove (414) are connected and fixed by another columnar member in sequence through penetration, and the columnar member is specifically a first connecting pin (44).

4. The handle assembly of claim 3 wherein: a pair of first limiting holes (411) penetrating to the nesting hole (31) are provided on the inner walls of the two sides of the positioning groove (414) in the radial direction thereof, the first limiting holes (411) extend and distribute in the axial direction of the mandrel main body (41), and the mounting positions of the first connecting pin (44) and a second connecting pin (47) are located on the upper and lower sides of the first limiting hole (411), respectively.

5. The handle assembly set forth in claim 1, wherein: a ring-shaped limiting ring face (311) is formed at the bottom position of the nesting hole (31) in the pushing shaft sleeve (30), the spring (50) is arranged between the limiting ring face (311) and the mandrel main body (41), the extension shaft (43) penetrates through the middle of the spring (50), and the center of the limiting ring face (311) forms a notch groove (312) opposite to the position of the extension shaft (43).

6. The handle assembly set forth in claim 5, wherein: the extension length of the extension shaft (43) is designed such that, when the mandrel (40) is in the highest initial position and the pushing shaft sleeve (30) is in the lowest initial position, the lower end of the extension shaft (43) is flush with or relatively exceeds the bottom of the notch groove (312).

7. The handle assembly set forth in claim 1, wherein: the cross section of the mounting hole (21) is cylindrical, triangular, square or petal-shaped.

8. The handle assembly set forth in claim 1, wherein: the positioning column (42) and the extension shaft (43) are both square bars with square cross sections.

9. The handle assembly set forth in claim 2, wherein: a recessed groove (412) is formed on the upper end of the mandrel main body (41), and the recessed groove (412) covers the positioning groove (414).

10. The handle assembly set forth in claim 1, wherein: The upper end face of the tool outer base (20) is provided with a positioning structure for positioning the handle inner cover or face cover, which comprises a limiting ring (22) distributed in a ring shape and a limiting structure (23) for limiting the circumferential rotation of the inner cover or face cover, and the limiting structure (23) is a positioning face provided on the limiting ring or a protruding structure provided on the upper end face of the tool outer base.

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