CN111841032A - Combined toy - Google Patents

Abstract

The invention provides a combined toy which comprises at least one head component and at least one main body component, wherein each main body component is connected with the corresponding head component through a first connecting piece, each main body component comprises an upper body part and a lower body part in plug connection with the upper body part, and a tail is in plug connection with the rear side of each main body component; the first connecting piece comprises a first connecting part arranged on the head assembly and a second connecting part arranged on the body part, and the first connecting part and the second connecting part are movably connected. The invention has simple structure, easy disassembly and assembly, more lovely appearance and action compared with the prior combined toy, can exchange bodies and be assembled randomly among products of the same series, and can accommodate the main body component in the head component, thus occupying small space and being convenient for storage and placement.

Description

Combined toy

Technical Field

The invention relates to the technical field of toy articles, in particular to a combined toy.

Background

The combined toy is a toy which is liked by many children due to the characteristic of being disassembled and assembled, and the toy is often disassembled by the children or intentionally or carelessly during the playing process of the toy, and in the face of the condition, the existing combined toy has the following defects: the structure is too complex, and the toy cannot be quickly disassembled and assembled and is not suitable for children to play; a plurality of small parts are used for connection, for example, connecting pieces such as tiny screws are used for connection, and the small parts of the combined toy are easy to lose after being disassembled, so that the combined toy cannot be successfully reassembled; the toy is too unitary and has no parts for replacement assembly; large volume, large occupied space and poor storage and placement.

Therefore, it is necessary to provide a combined toy which has a simple structure, is easy to disassemble and assemble, can replace assembling parts, and is convenient to store and place.

Disclosure of Invention

In view of the above technical problems in the related art, the present invention provides a combination toy, which is easy to disassemble and assemble by a simple structural design, and can replace the assembled components at will according to the preference, and can also store small components in a large component, so that the small component occupies a small space and is convenient to store and place.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a combined toy comprises at least one head assembly and at least one main body assembly, wherein each main body assembly is connected with the corresponding head assembly through a first connecting piece, each main body assembly comprises an upper body part and a lower body part which is connected with the upper body part in an inserted manner, and a tail is inserted and connected to the rear side of each main body assembly; the first connecting piece comprises a first connecting part arranged on the head assembly and a second connecting part arranged on the upper body part, and the first connecting part and the second connecting part are movably connected.

Furthermore, each head assembly comprises a face portion and a rear shell in butt joint with the face portion, the first connecting portion is formed at the bottom of the butt joint of the face portion and the rear shell, the first connecting portion is in an opening shape, the second connecting portion is formed at the top of the upper body portion, the second connecting portion is a protruding portion matched with the opening shape, and each first connecting portion is detachably connected with the corresponding second connecting portion.

Further, the head assembly and the body assembly each include a plurality, and either the head assembly is replaceably connected to the corresponding body assembly, or the body assembly is replaceably connected to the corresponding head assembly.

Furthermore, the head assembly and the main body assembly are both hollow, and the size of the cavity in the head assembly is larger than that of the main body assembly, so that the main body assembly is accommodated in the head assembly.

Furthermore, the upper body part and the lower body part are connected in a plugging manner through a second connecting piece; the second connecting piece comprises an inserting part arranged on the lower portion of the upper body part and an inserting groove arranged on the upper portion of the lower body part and matched with the inserting part in shape and size, and the inserting part is inserted into the inserting groove to insert the upper body part into the lower body part.

Further, the tail is in plug connection with the upper body part and/or the lower body part through a third connecting piece; the third connecting piece is including locating S-shaped on the tail inserts the position, and locate on the upper torso portion and/or the lower torso portion and with S-shaped insert position appearance and size adaptation' S S-shaped slot, S-shaped insert position insert locate in S-shaped slot with the tail is pegged graft in the upper torso portion and/or the lower torso portion.

Furthermore, shoulders are arranged on two sides of the upper body part, and the upper body part, the second connecting part and the shoulders are integrally formed.

Furthermore, both sides of the lower trunk part are respectively connected with a rear foot through a rear leg, the front of the lower trunk part is respectively connected with a front foot through a front leg, the front legs are correspondingly connected with the shoulders, and the lower trunk part, the rear legs, the rear feet, the front legs and the front feet are integrally formed.

Furthermore, ears are installed on two sides of the head assembly, a decorative hairstyle is arranged at the top end of the head assembly, and the ears and the decorative hairstyle are arranged on a butt joint line of the face and the rear shell.

A combined toy comprises at least one head assembly and at least one main body assembly; each main body component is detachably connected with the corresponding head component; any of the head assemblies is replaceably connected with a corresponding body assembly, or any of the body assemblies is replaceably connected with a corresponding head assembly; the head assembly is hollow, and the size of the inner cavity of the head assembly is larger than that of the main body assembly, so that the main body assembly is accommodated in the head assembly.

Compared with the prior art, the invention has the beneficial effects that: simple structure, quick detachable, easy equipment, outward appearance, action compare in current combination toy more lovely to can replace the equipment part at will according to the hobby, can also accomodate the main part subassembly in the head subassembly, make it occupy the space little, be convenient for collect and put.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding to some embodiments of the present invention.

Fig. 1 is a schematic structural view of a combination toy according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of a combination toy according to an embodiment of the present invention.

Fig. 3 is an exploded perspective view of another perspective of a combination toy according to an embodiment of the present invention.

In the figure: the head assembly 1, the upper body part 2, the lower body part 3, the tail 4, the ears 5, the first connecting part 101, the face 102, the rear shell 103, the decorative hairstyle 104, the ear mounting holes 105, the limiting strips 106, the second connecting part 201, the inserting part 202, the shoulders 203, the S-shaped inserting groove 230, the inserting groove 301, the rear leg 302, the rear foot 303, the front leg 304, the front foot 305, the S-shaped inserting position 401, the ear clamping part 501, the mounting column 1021, the connecting hole 1022, the limiting groove 1023, the connecting strip 1031, the fixing strip 1032, the first connecting block 2011 and the second connecting block 2012.

Detailed Description

In order to solve the problems that the combined toy in the prior art has a complex structure, is not easy to disassemble and assemble, can not replace assembled parts, occupies large space, is not easy to store and place and the like, the invention aims to provide the combined toy which has a simple structure, is easy to disassemble and assemble, and has the core idea that: through simple structural design, make the combination toy reach the purpose of quick detachable, easy equipment to can replace the equipment part at will according to the hobby, can also accomodate the widget in big part, make it account for the space little, be convenient for collect and put.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, a combined toy according to an embodiment of the present invention includes at least one head assembly 1 and at least one body assembly, each body assembly is connected to the corresponding head assembly 1 through a first connecting member, wherein the body assembly includes an upper body portion 2 and a lower body portion 3 inserted into the upper body portion 2, and a tail 4 is inserted into a rear side of the body assembly; the first connecting member includes a first connecting portion 101 disposed on the head assembly 1 and a second connecting portion 201 disposed on the upper torso portion 2, and the first connecting portion 101 is movably connected to the second connecting portion 201.

In the preferred embodiment, each head assembly 1 comprises a face portion 102 and a rear shell 103 connected with the face portion 102 in an abutting manner, the first connecting portion 101 is formed at the bottom of the abutting portion of the face portion 102 and the rear shell 103, the first connecting portion 101 is in an open shape, the second connecting portion 201 is formed at the top of the upper body portion 2, the second connecting portion 201 is a protruding portion matched with the open shape, and each first connecting portion 101 is detachably connected with the corresponding second connecting portion 201.

Specifically, in this preferred embodiment, the second connecting portion 201 is composed of a first connecting block 2011 connected with the upper body portion 2 and a second connecting block 2012 arranged on the first connecting block 2011 and having a diameter larger than that of the first connecting block 2011, the first connecting block 2011 and the second connecting block 2012 are both cylindrical, the first connecting portion 101 arranged at the lower end of the head assembly 1 is a head assembly mounting hole having an opening shape, the head assembly mounting hole is clamped with the second connecting portion 201, the diameter of the head assembly mounting hole is smaller than that of the second connecting block 2012 and just larger than that of the first connecting block 2011, and the second connecting block 2012 is located inside the head assembly mounting hole and cannot be disengaged, so that the head assembly 1 and the body portion 2 are stably connected under a normal condition of being installed and cannot drop.

As shown in fig. 2 and 3, in the preferred embodiment, the upper body part 2 and the lower body part 3 are connected by a second connector; the second connecting piece comprises an inserting part 202 arranged at the lower part of the upper body part 2 and an inserting groove 301 which is arranged at the upper part of the lower body part 3 and is matched with the shape and the size of the inserting part 202, and the inserting part 202 is inserted into the inserting groove 301 to insert the upper body part 2 into the lower body part 3. The upper body part 2 and the lower body part 3 can be stably connected in a splicing mode, and the structure is simple, and the disassembly and the assembly are convenient.

Specifically, the cross-sectional shapes of the insertion part 202 and the insertion groove 301 may be circular, square, triangular, polygonal, or irregular, and may be any shape, in this embodiment, the cross-sectional shapes of the insertion part 202 and the insertion groove 301 are fan-shaped, and the sidewall of the insertion part 202 is provided with a plurality of flutes, so that after insertion, the friction between the sidewall of the insertion part 202 and the inner wall of the insertion groove 301 is increased, and the connection between the upper body part 2 and the lower body part 3 is more stable.

In addition, in the preferred embodiment, a bump is further provided right in front of the upper torso part 2, a hollow groove matched with the bump is further provided on the lower torso part 3, an inverted triangle plate is provided between the two front legs below the hollow groove, after the upper torso part 2 and the lower torso part 3 are inserted, the bump and the hollow groove are matched with each other just and are abutted on the inverted triangle plate, so that the upper torso part 2 and the lower torso part 3 are connected into a whole without any gap, and the structure is more attractive and can be enhanced in structural stability.

As shown in fig. 2 and 3, in the preferred embodiment, the tail 4 is connected with the upper body 2 and/or the lower body 3 by a third connector; the third connecting piece comprises an S-shaped inserting position 401 arranged on the tail 4 and an S-shaped inserting groove 230 which is arranged on the upper body part 2 and/or the lower body part 3 and matched with the S-shaped inserting position 401 in shape and size, and the S-shaped inserting position 401 is inserted into the S-shaped inserting groove 230 to insert the tail 4 into the upper body part 2 and/or the lower body part 3.

Specifically, in the preferred embodiment, half of the S-shaped insertion sites 401 are respectively arranged on the upper torso part 2 and the lower torso part 3, and after the tail 4 is inserted into the S-shaped insertion sites 401, the effect of beauty decoration is achieved, and the fixing function of the upper torso part 2 and the lower torso part 3 can be achieved, so that the connection between the upper torso part 2 and the lower torso part 3 is more stable.

As shown in fig. 2 and 3, in the preferred embodiment, the shoulders 203 are disposed on two sides of the upper body 2, and the upper body 2, the second connecting portion 201, and the shoulders 203 are integrally formed, so as to avoid the disadvantages of difficult assembly and easy loss due to too many scattered components.

In the preferred embodiment, both sides of the lower torso part 3 are respectively connected with a rear foot 303 through a rear leg 302, the front of the lower torso part 3 is respectively connected with a front foot 305 through a front leg 304, the front leg 304 is correspondingly connected with the shoulder part 203, so that the shoulder part 203 and the front leg 304 are seen as a unified body; the lower torso part 3, the rear legs 302, the rear legs 303, the front legs 304 and the front legs 305 are integrally formed, so that the defects of difficult assembly, easy loss and the like caused by too many scattered parts are avoided. In addition, the bottom surfaces of the front feet 305, the rear feet 303 and the lower body part 3 are positioned on the same plane, so that the toy cannot incline or fall down when being placed; the front leg 305 is positioned over half of the length of the rear leg 303, so that the toy looks more beautiful and reasonable.

In the preferred embodiment, the front legs 304 and the front legs 305 of the combined toy are extended, and the rear legs 302 and the rear legs 303 are bent, so that the combined toy is in a clever squatting state after being integrally combined, and is more popular with children.

As shown in fig. 2 and 3, in the preferred embodiment, the head assembly 1 is provided with ears 5 at both sides, the top end of the head assembly 1 is provided with the decorative hairstyle 104, and the ears 5 and the decorative hairstyle 104 are both arranged on the butt line of the face portion 102 and the rear shell 103, so as to achieve better aesthetic effect and make the toy more lovely.

Specifically, in the preferred embodiment, the head assembly 1 is provided with ear mounting holes 105 at two sides, and the ear mounting holes 105 are located on the same butt joint line of the face portion 102 and the rear shell 103 as the head assembly mounting holes; in addition, an ear clip portion 501 is connected to the ear 5, and the structure of the ear clip portion 501 is similar to that of the second connecting portion 201, that is: the ear clamping portion 501 also has two cylindrical connecting blocks, one of which has a slightly smaller diameter and is connected with the ear 5, and the other of which has a slightly larger diameter and is disposed on the connecting block having a slightly smaller diameter, and the diameter of the ear mounting hole 105 is smaller than the diameter of the connecting block having a slightly larger diameter and is just larger than the diameter of the connecting block having a slightly smaller diameter; in this way it is ensured that the ears 5 will not fall off under normal conditions of the toy when assembled. In addition, the decorative hairstyle 104 is divided into two halves, one half is integrally connected to the face part 102 and the other half is integrally connected to the rear shell 103, and the two halves are connected to form a vertical and upward hair tuft, so that the decorative hairstyle has a decorative effect, and the toy figure is more lively and lovely.

As shown in fig. 2 and 3, in the preferred embodiment, the inner side of the face portion 102 is provided with mounting posts 1021 arranged in a triangular manner, the center of the mounting posts 1021 is a connecting hole 1022 in a regular hexagon, the inner side of the rear shell 103 is provided with a connecting strip 1031 corresponding to the connecting hole 1022, one side of the connecting strip 1031 is provided with a fixing strip 1032, and the length of the fixing strip 1032 is smaller than that of the connecting strip 1031, so as to strengthen and stabilize. When the face 102 and the rear shell 103 are mounted, the corresponding connecting strip 1031 is inserted into the connecting hole 1022 to achieve the squeezing connection, so that the face 102 and the rear shell 103 are combined into a whole, i.e., the head assembly 1 is formed, at this time, the mounting post 1021 abuts against the fixing strip 1032, i.e., the fixing strip 1032 also forms a limiting effect on the mounting post 1021. In addition, when the face portion 102 and the rear case 103 are to be detached, they may be separated by force.

Optionally, the outer diameter of the connecting strip 1031 close to one end of the rear housing 103 is gradually reduced to the outer diameter far away from one end of the rear housing 103, the inner diameter of the connecting hole 1022 close to one end of the face 102 is gradually increased to the inner diameter far away from one end of the face 102, when the assembly is performed, the end with the smaller outer diameter of the connecting strip 1031 is gradually inserted into the end with the smaller inner diameter of the connecting hole 1022 from the end with the larger inner diameter of the connecting hole 1022, finally, the end with the smaller outer diameter of the connecting strip 1031 and the end with the smaller inner diameter of the connecting hole 1022 form a press fit connection, so that the connecting strip 1031 is clamped in the connecting hole 1022, the stable connection between the rear housing 103 and the face 102 is realized, and the connecting strip 1031 can be accurately and quickly positioned in the connecting hole 1022 in the assembly process, thereby facilitating the quick assembly of the rear housing 103 and.

In the preferred embodiment, the face portion 102 and the rear case 103 are each provided with a stopper 106 inside the head unit mounting hole and the ear mounting hole 105, and the stopper 106 abuts between each connecting piece and the inner wall, so that the head unit 1 and the ear 5 are not loosened in the assembled state. In the preferred embodiment, the face portion 102 is further provided with a limiting groove 1023 at the inner side of the ear mounting hole 105, so as to further enhance the limiting effect on the connecting block and achieve the effect of enhancing the structural stability like a reinforcing rib.

In a preferred embodiment of the present invention, the head assembly 1 and the body assembly each comprise a plurality, wherein either the head assembly 1 is replaceably connected to the corresponding body assembly, or either the body assembly is replaceably connected to the corresponding head assembly 1. That is to say, a plurality of head components 1 and main body components can be matched at will, any head component 1 and any main body component can be successfully assembled, the purpose of replacing assembled parts at will according to the preference is achieved, and the problem that the toy is single and boring is solved.

In another preferred embodiment of the present invention, the head module 1 and the main body module are hollow, which can save materials and make the combined toy lighter and more suitable for playing. Additionally, in the preferred embodiment, the interior cavity of the head assembly 1 is sized larger than the body assembly for receiving the body assembly within the head assembly 1. In actual operation, the head assembly 1 is opened, the main body assembly is placed in the cavity of the face 102 or the rear shell 103, and then the head assembly 1 and the main body assembly are assembled, so that the main body assembly is accommodated by the head assembly 1, a large amount of space can be saved, the whole toy occupies small space, and the toy is convenient to store and place.

In another embodiment, after the face portion 102 and the rear shell 103 are opened, the body assembly can be directly flipped over along the connection portion into the cavity of the face portion 102 or the rear shell 103, and then the face portion 102 and the rear shell 103 are assembled into the head assembly 1. The setting is more convenient and rapid and has interestingness.

In another preferred embodiment of the present invention, the combination toy comprises at least one head assembly 1 and at least one body assembly, wherein each body assembly is detachably connected to the corresponding head assembly 1; either head assembly 1 is replaceably connected with the corresponding body assembly, or either body assembly is replaceably connected with the corresponding head assembly 1; the head assembly 1 is hollow, and the size of the inner cavity of the head assembly 1 is larger than that of the main body assembly, so that the main body assembly is accommodated in the head assembly 1.

The structural design of the head assembly 1 and the body assembly in this embodiment is the same as that of the above-described embodiment. In this example, the combination toy simple structure, quick detachable, easy equipment, outward appearance, action compare in current combination toy lovely to can replace the equipment part at will according to hobby, can also accommodate the main part subassembly in the head subassembly, make it occupy the space little, be convenient for collect and put. That is, the composite toy of the present embodiment has the features of being detachable, storable and replaceable at the same time.

In order to facilitate understanding of the above-described embodiments of the present invention, the following detailed description will be made of the above-described embodiments of the present invention in terms of specific assembling and disassembling modes.

During specific assembly, the ears 5 and the upper body part 2 are assembled with the face part 102 or the rear shell 103, then the other half head assembly 1, namely the rear shell 103 or the face part 102 is assembled with the face part 102 or the rear shell 103, the assembly of the head assembly 1 can be completed, the head assembly 1 can fix the ears 5 and the upper body part 2, then the upper body part 2 and the lower body part 3 are assembled in an inserting mode, the whole assembly of the combined toy can be completed, in addition, the tail 5 can be inserted into the upper body part 2 and the lower body part 3, and the attractiveness is improved. After being assembled, the combined toy is seamless, beautiful and lovely, and can attract playing and collection.

When the head assembly 1 is disassembled, the upper body part 2 and the lower body part 3 can be disassembled freely through certain force, the head assembly 1 can be disassembled into the face part 102 and the rear shell 103 through certain force, and the upper body part 2 and the ears 5 can be taken down easily after the head assembly 1 is disassembled.

In addition, the head components 1 and the main body components can be matched at will, the assembly parts can be replaced at will according to the preference, and the main body components can be accommodated in the head components 1 for storage.

In conclusion, the combined toy can be integrally disassembled and assembled through a simple structural design, and has the characteristics of easiness in disassembly and assembly; compared with the existing combined toy, the appearance and the action of the combined toy are more attractive, lovely and more favorable; in addition, as long as the connecting part is unchanged, the parts can be freely combined with the combined toys in the same series, and the toy has more playability; in addition, the invention can also accommodate the main body component in the head component, so that the head component occupies small space and is convenient to store and place.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (10)

1. A combination toy, includes at least head module (1) and at least one main part subassembly, each said main part subassembly all is connected through first connecting piece with corresponding head module (1), its characterized in that:

the main body component comprises an upper body part (2) and a lower body part (3) in plug connection with the upper body part (2), and a tail (4) is plugged at the rear side of the main body component;

The first connecting piece comprises a first connecting portion (101) arranged on the head assembly (1) and a second connecting portion (201) arranged on the upper body portion (2), and the first connecting portion (101) is movably connected with the second connecting portion (201).

2. A combination toy according to claim 1, wherein each head unit (1) comprises a face portion (102) and a rear case (103) which is butt-jointed to the face portion (102), the first connecting portion (101) is formed at the bottom of the butt-jointed portion of the face portion (102) and the rear case (103), the first connecting portion (101) is open-shaped, the second connecting portion (201) is formed at the top of the upper body portion (2), the second connecting portion (201) is a protruding portion which is fitted to the open-shaped, and each first connecting portion (101) is detachably connected to the corresponding second connecting portion (201).

3. A combination toy according to claim 1, wherein the head unit (1) and the body unit each comprise a plurality, any of the head units (1) being replaceably connectable to the corresponding body unit, or any of the body units being replaceably connectable to the corresponding head unit (1).

4. A combination toy according to claim 1, wherein the head unit (1) and the body unit are hollow inside, and the size of the cavity inside the head unit (1) is larger than the size of the body unit for receiving the body unit in the head unit (1).

5. A combination toy according to claim 1, wherein the upper torso part (2) and the lower torso part (3) are connected by a second connector;

the second connecting piece comprises an inserting part (202) arranged on the lower portion of the upper body part (2) and an inserting groove (301) arranged on the upper portion of the lower body part (3) and matched with the inserting part (202) in shape and size, and the inserting part (202) is inserted into the inserting groove (301) to insert the upper body part (2) into the lower body part (3).

6. A combined toy according to claim 1, characterised in that the tail (4) is plug-connected with the upper torso part (2) and/or the lower torso part (3) by a third connection;

the third connecting piece is including locating S-shaped on tail (4) insert position (401) and locate go up trunk portion (2) and/or on lower trunk portion (3) and with S-shaped insert position (401) appearance and size adaptation' S S-shaped slot (230), S-shaped insert position (401) insert locate in S-shaped slot (230) with tail (4) peg graft in last trunk portion (2) and/or lower trunk portion (3).

7. A combination toy according to claim 1, wherein the upper torso portion (2) is provided with shoulders (203) at both sides thereof, and the upper torso portion (2), the second connecting portion (201) and the shoulders (203) are integrally formed.

8. A combination toy according to claim 7, wherein the lower torso portion (3) is connected on each side to a rear foot (303) by a rear leg (302), the lower torso portion (3) is connected in front to a front foot (305) by a front leg (304), the front leg (304) is connected to the shoulder portion (203), and the lower torso portion (3), rear leg (302), rear foot (303), front leg (304) and front foot (305) are integrally formed.

9. A combined toy as claimed in claim 1, wherein the head unit (1) is provided with ears (5) at both sides thereof, the head unit (1) is provided with a decorative hairstyle (104) at the top end thereof, and the ears (5) and the decorative hairstyle (104) are both provided at the joint line of the face portion (102) and the rear shell (103).

10. A combination toy comprising the combination toy of any one of claims 1 to 9, wherein: comprises at least one head assembly (1) and at least one body assembly;

each main body component is detachably connected with the corresponding head component (1);

Any of the head assemblies (1) can be alternatively connected with a corresponding main body assembly, or any of the main body assemblies can be alternatively connected with a corresponding head assembly (1);

the head assembly (1) is hollow, and the size of the inner cavity of the head assembly (1) is larger than that of the main body assembly, so that the main body assembly is accommodated in the head assembly (1).

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