Hoisting structure and hidden clothes airing machine
By separating the casing and storage box of the concealed clothes drying rack and installing a hanging part on the top of the storage box, the clothes drying rod can be raised and lowered using a motor and reversing rollers. This solves the problem of complicated casing specifications and achieves uniform casing models and stable hanging.
Patent Information
- Application Number
- CN202520525598.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-25
AI Technical Summary
The existing concealed clothes drying racks have a wide variety of housing specifications that cannot be standardized, resulting in the need to match various housings to accommodate clothes drying rods of different lengths.
By separating the housing and the storage box, the clothes drying rod is stored in the storage box, and a hanging part is set on the top of the storage box. The clothes drying rod is raised and lowered by a motor and reversing rollers, reducing the number of housing models and achieving uniformity in housing models.
It has achieved a unified casing specification, simplified casing models, stabilized the hanging storage box, and adapted to the needs of clothes drying rods of different specifications.
Smart Images

Figure CN223921822U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of clothes drying rack technology, and in particular relates to a hanging structure and a concealed clothes drying rack. Background Technology
[0002] A concealed clothes drying rack is a clothes drying device that can be completely hidden in the ceiling or balcony ceiling. It features invisibility, aesthetics, and intelligence. Existing concealed clothes drying racks typically consist of a casing and a clothes drying rod. The casing is connected to the wall by expansion bolts, and a motor is installed inside the casing to raise, lower, and retract the clothes drying rod into the casing. However, since clothes drying rods come in various lengths, various casings are required, resulting in a complex range of casing specifications.
[0003] Therefore, how to avoid complex casing specifications is a technical problem that urgently needs to be solved in this field.
[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content
[0005] This disclosure provides at least one hoisting structure and a concealed clothes drying rack.
[0006] In a first aspect, embodiments of this disclosure provide a hoisting structure, comprising: a storage box suitable for storing a clothes drying rod; a main unit centrally disposed at the top of the storage box, the main unit containing a clothes drying motor; a mirror-displayed hoisting part disposed at the top of the storage box, the top of the hoisting part having a hoisting hole to form an installation position, the installation position being suitable for connection with a connector on a wall; and the hoisting part including a reversing roller, the rope of the clothes drying motor being wound around the reversing roller to allow the clothes drying rod to be raised and lowered.
[0007] In one optional embodiment, the hoisting part includes a hoisting bracket, the hoisting bracket being "C"-shaped, the open end of the hoisting bracket being inserted into the top of the storage box and connected to the side wall of the storage box, the hoisting hole being opened on the top of the hoisting bracket, and the hoisting bracket being disposed at both ends of the storage box so that the mounting positions are disposed at both ends of the storage box.
[0008] In one optional embodiment, a support shaft is provided inside the hoisting bracket, and the reversing roller is rotatably mounted on the support shaft.
[0009] In one optional embodiment, the hoisting parts are respectively disposed at both ends of the main unit; the hoisting parts include hoisting support plates, which are disposed at the ends of the main unit, with the top of the hoisting support plates folded outward, and the hoisting holes are disposed at the outward folded ends of the hoisting support plates; and the top surface of the main unit extends outward and connects to the outward folded ends of the hoisting support plates.
[0010] In one optional embodiment, the sidewall of the hoisting support plate is folded inward to form a pair of support plates, a support shaft is inserted between the support plates, and the reversing roller is rotatably mounted on the support shaft.
[0011] In one alternative embodiment, the bottom of the hoisting support plate is folded inward, and the folded end of the hoisting support plate is inserted into the main unit and connected to the bottom surface of the main unit.
[0012] In one optional embodiment, the storage box is provided with a storage cavity, the bottom of the storage cavity is open to store the clothes drying rod, and the opening end of the storage cavity is provided with a pair of conical surfaces, which are centrally located in the storage box to guide the clothes drying rod to be stored in the center; and the top of the storage box is provided with a through opening, through which the cable of the clothes drying motor is threaded.
[0013] Secondly, this disclosure also provides a concealed clothes drying rack, including: the above-mentioned hoisting structure; a clothes drying rod, on which a hanging block is slidably disposed, the top of the hanging block being connected to the cable of a retractable motor, and the clothes drying rod having a plurality of hanging holes for hanging clothes.
[0014] In one optional embodiment, the clothes drying rod includes a main rod and a secondary rod; the top of the main rod is provided with a reinforcing rib, the hanging hole is formed on the reinforcing rib, the hanging block is slidably disposed on the reinforcing rib, and; the top of the reinforcing rib is provided with a snap-fit strip, the width of the snap-fit strip is greater than the width of the reinforcing rib, the hanging block is inserted into the snap-fit strip to suspend the main rod; the secondary rod is connected to the bottom of the main rod through a telescopic part.
[0015] In one optional embodiment, the telescopic part includes a telescopic buckle and a telescopic spring; the telescopic buckle is engaged inside the secondary rod, one end of the telescopic spring is hung on the pin of the telescopic buckle, and the other end of the telescopic spring is connected to a steel wire rope, the end of the steel wire rope extends out of the secondary rod and is fixedly connected to the main rod.
[0016] In one optional embodiment, the bottom of the main rod is provided with a fitting cavity, and a fitting buckle is provided in the fitting cavity; the top of the auxiliary rod is provided with a fitting strip, the fitting strip is adapted to be housed in the fitting cavity, and the fitting strip can be fastened by the fitting buckle.
[0017] The beneficial effects of this utility model are that the hanging structure and concealed clothes drying rack complete the storage of the clothes drying rod by setting up a storage box, and complete the raising and lowering of the clothes drying rod with the main unit on the top of the storage box. It realizes the separate setting of the storage box and the main unit. When choosing different specifications of clothes drying rods, only different storage boxes need to be matched, which reduces the specifications and models of the machine casing and realizes the uniformity of the machine casing model. Furthermore, since the lengths of the main unit and the storage box are different, a separate hanging part is set on the top of the storage box to complete the stable hanging of the storage box.
[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.
[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 A perspective view of a hoisting structure and a concealed clothes drying rack provided in an embodiment of this disclosure;
[0022] Figure 2 This is a front view of a hoisting structure and a concealed clothes drying rack provided in an embodiment of this disclosure;
[0023] Figure 3 A perspective view of a hoisting structure and a concealed clothes drying rack provided in an embodiment of this disclosure;
[0024] Figure 4 This is a cross-sectional view of a clothes drying rack provided in an embodiment of this disclosure.
[0025] In the picture:
[0026] 1. Storage box;
[0027] 11. Lifting section; 11a. Lifting hole; 11b. Reversing roller; 11c. Lifting bracket; 11d. Support shaft; 11e. Lifting support plate; 11f. Support plate;
[0028] 12. Storage cavity; 12a. Conical surface;
[0029] 13. Penetration opening;
[0030] 2. Main unit; 21. Transceiver;
[0031] 3. Clothes drying rod; 31. Hanging block; 32. Hanging hole;
[0032] 33. Main rod; 33a. Reinforcing rib; 33b. Connecting strip; 33c. Fitting cavity; 33d. Fitting buckle;
[0033] 34. Sub-bar; 34a. Adhesive strip;
[0034] 35. Telescopic part; 35a. Telescopic buckle; 35b. Telescopic spring; 35c. Steel wire rope. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0036] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.
[0037] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.
[0038] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.
[0039] Research has revealed that existing concealed clothes drying racks require the clothes drying rod to be stored inside the housing. The existing housing needs to be the same length as the clothes drying rod, resulting in complex housing specifications. This is the problem and objective that the utility model aims to solve.
[0040] Based on the above research, this disclosure provides a hanging structure and a concealed clothes drying rack, which separates the casing and the storage box to make the casing specifications uniform.
[0041] The shortcomings of the above solutions are the result of the utility model inventor's practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as contributions made by the utility model inventor to this disclosure.
[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0043] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0044] See Figures 1 to 4 , Figure 1A hanging structure is shown, comprising: a storage box 1 adapted to store a clothes drying rod 3; a main unit 2 centrally located at the top of the storage box 1, the main unit 2 housing a clothes-receiving motor 21; a mirror-mounted hanging part 11 located at the top of the storage box 1, the top of the hanging part 11 having a hanging hole 11a to form a mounting position adapted to connect with a connector on a wall; and the hanging part 11 including a reversing roller 11b, the cable of the clothes-receiving motor 21 wound around the reversing roller 11b and connected to the clothes drying rod 3, so that... The clothes drying rod 3 is raised and lowered; in short, this hanging structure and concealed clothes drying machine uses a storage box 1 to store the clothes drying rod 3, and the main unit 2 on the top of the storage box 1 to raise and lower the clothes drying rod 3. This achieves separate installation of the storage box 1 and the main unit 2. When using different specifications of clothes drying rods 3, only different storage boxes 1 need to be matched, reducing the specifications and models of the machine casing and achieving uniformity of machine casing models. Furthermore, since the lengths of the main unit 2 and the storage box 1 are not equal, a separate hanging part 11 is set on the top of the storage box 1 to complete the stable hanging of the storage box 1.
[0045] See Figure 1 and Figure 2 In some embodiments, the hoisting part 11 includes a hoisting bracket 11c, which is C-shaped. The open end of the hoisting bracket 11c is inserted into the top of the storage box 1 and connected to the side wall of the storage box 1. The hoisting hole 11a is opened on the top of the hoisting bracket 11c. The hoisting bracket 11c is disposed at both ends of the storage box 1 so that the mounting positions are disposed at both ends of the storage box 1. In short, the hoisting bracket 11c is installed at both ends of the storage box 1 so that both ends of the storage box 1 are hoisted, thereby stabilizing the hoisting of the storage box 1.
[0046] See Figure 1 and Figure 2 In some embodiments, a support shaft 11d is provided inside the hoisting bracket 11c, and the reversing roller 11b is rotatably mounted on the support shaft 11d; in short, the reversing roller 11b is rotatably mounted inside the hoisting bracket 11c via the support shaft 11d to wind the cable of the generator 21 and complete the hoisting of the clothes drying rod 3.
[0047] See Figure 3In some embodiments, the hoisting parts 11 are respectively disposed at both ends of the main unit 2; the hoisting parts 11 include hoisting support plates 11e, which are disposed at the ends of the main unit 2, with the top of the hoisting support plates 11e folded outward, and the hoisting holes 11a disposed at the outward folded ends of the hoisting support plates 11e; the top surface of the main unit 2 extends outward and connects with the outward folded ends of the hoisting support plates 11e; in short, the hoisting support plates 11e are integrally disposed with the main unit 2, the top of the hoisting support plates 11e is folded outward, and the hoisting holes 11a are disposed at the outward folded ends of the hoisting support plates 11e, so that the installation positions are disposed at both ends of the main unit 2, and the installation of the concealed clothes drying rack is completed by hoisting the main unit 2.
[0048] See Figure 3 In some embodiments, the sidewall of the hoisting support plate 11e is folded inward to form a pair of support plates 11f, and a support shaft 11d is inserted between the support plates 11f. The reversing roller 11b is rotatably mounted on the support shaft 11d. In short, the sidewall of the hoisting side plate is folded inward to form a support plate 11f to accommodate the reversing roller 11b.
[0049] See Figure 3 In some embodiments, the bottom of the hoisting support plate 11e is folded inward, and the inward-folded end of the hoisting support plate 11e is inserted into the host 2 and connected to the bottom surface of the host 2; in short, the outward-folded end and the inward-folded end of the hoisting support plate 11e are respectively connected to the host 2 by bolts, thus completing the installation of the hoisting support plate 11e.
[0050] See Figure 1 In some embodiments, the storage box 1 is provided with a storage cavity 12, the bottom of the storage cavity 12 is open to store the clothes drying rod 3, and the open end of the storage cavity 12 is provided with a pair of conical surfaces 12a, which are centrally located in the storage box 1 to guide the clothes drying rod 3 to be stored in the center; and the top of the storage box 1 is provided with a through opening 13, through which the cable of the retractable motor 21 is threaded. In short, the bottom of the storage cavity 12 is open to complete the storage of the clothes drying rod 3; the conical surfaces 12a can fit against the side wall of the clothes drying rod 3 to guide the clothes drying rod 3 to be stored in the center, and the top of the storage box 1 is provided with a through opening 13 to thread the cable of the retractable motor 21 to complete the hanging of the clothes drying rod 3.
[0051] See Figures 1 to 4 The diagram illustrates a concealed clothes drying rack, comprising: the aforementioned hoisting structure; a clothes drying rod 3, on which a hanging block 31 is slidably disposed, the top of which is connected to the cable of a retractable motor 21; and several hanging holes 32 are provided on the clothes drying rod 3 for hanging clothes. In short, the clothes drying rod 3 has a hanging block 31 slidably disposed to accommodate the position of the cable of the retractable motor 21.
[0052] See Figure 4 In some embodiments, the clothes drying rod 3 includes a main rod 33 and a secondary rod 34; the top of the main rod 33 is provided with a reinforcing rib 33a, the hanging hole 32 is opened on the reinforcing rib 33a, the hanging block 31 is slidably disposed on the reinforcing rib 33a, and the top of the reinforcing rib 33a is provided with a snap-fit strip 33b, the width of the snap-fit strip 33b is greater than the width of the reinforcing rib 33a, the hanging block 31 is inserted into the snap-fit strip 33b to suspend the main rod 33; the secondary rod 34 is connected to the bottom of the main rod 33 through a telescopic part 35; in short, the top of the main rod 33 is provided with a reinforcing rib 33a to improve the bending resistance of the main rod 33; the width of the snap-fit strip 33b is greater than the width of the reinforcing rib 33a, and the hanging block 31 is inserted into the snap-fit strip 33b to suspend the main rod 33.
[0053] See Figure 4 In some embodiments, the telescopic part 35 includes a telescopic buckle 35a and a telescopic spring 35b; the telescopic buckle 35a is engaged within the secondary rod 34, one end of the telescopic spring 35b is attached to a pin of the telescopic buckle 35a, and the other end of the telescopic spring 35b is connected to a steel wire rope 35c. The end of the steel wire rope 35c extends out of the secondary rod 34 and is fixedly connected to the main rod 33. In short, the telescopic buckle 35a is engaged within the secondary rod 34, one end of the steel wire rope 35c is connected to the main rod 33, and the other end is connected to the pin of the telescopic buckle 35a via the telescopic spring 35b, so that when the main rod 33 and the secondary rod 34 are actively closed, the steel wire rope 35c is retracted into the secondary rod 34.
[0054] See Figure 4 In some embodiments, the bottom of the main rod 33 is provided with a fitting cavity 33c, and a fitting buckle 33d is provided inside the fitting cavity 33c; the top of the secondary rod 34 is provided with a fitting strip 34a, the fitting strip 34a is adapted to be housed in the fitting cavity 33c, and the fitting strip 34a can be fastened by the fitting buckle 33d; in short, the bottom of the main rod 33 is provided with a fitting cavity 33c to house the fitting strip 34a at the top of the secondary rod 34, and a buckle is provided inside the fitting cavity 33c to fasten the fitting strip 34a, so as to prevent the secondary rod 34 from falling off.
[0055] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0056] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.
[0057] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.
[0058] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.
[0059] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A hoisting structure, characterized in that, include: Storage box (1), which is suitable for storing clothes drying rod (3); The main unit (2) is centrally located at the top of the storage box (1), and a receiver (21) is installed inside the main unit (2). A mirror-mounted mounting part (11) is provided on the top of the storage box (1), and the top of the mounting part (11) is provided with a mounting hole (11a) to form a mounting position, the mounting position being adapted to be connected to a connector on the wall; The hoisting unit (11) includes a reversing roller (11b), and the cable of the retracting motor (21) is wound around the reversing roller (11b) to raise and lower the clothes drying rod (3).
2. The hoisting structure as described in claim 1, characterized in that, The hoisting part (11) includes a hoisting bracket (11c), which is "C" shaped. The open end of the hoisting bracket (11c) is inserted into the top of the storage box (1) and connected to the side wall of the storage box (1). The hoisting hole (11a) is opened on the top of the hoisting bracket (11c). The hoisting bracket (11c) is set at both ends of the storage box (1) so that the installation position is set at both ends of the storage box (1).
3. The hoisting structure as described in claim 2, characterized in that, The hoisting bracket (11c) is provided with a support shaft (11d), and the reversing roller (11b) is rotatably mounted on the support shaft (11d).
4. The hoisting structure as described in claim 1, characterized in that, The hoisting parts (11) are respectively installed at both ends of the main unit (2); The hoisting part (11) includes a hoisting support plate (11e), which is located at the end of the main unit (2). The top of the hoisting support plate (11e) is folded outward, and the hoisting hole (11a) is located at the outward folded end of the hoisting support plate (11e). The top surface of the host (2) extends outward and is connected to the outward-facing end of the hoisting support plate (11e).
5. The hoisting structure as described in claim 4, characterized in that, The side wall of the hoisting support plate (11e) is folded inward to form a pair of support plates (11f), and a support shaft (11d) is inserted between the support plates (11f). The reversing roller (11b) is rotatably mounted on the support shaft (11d).
6. The hoisting structure as described in claim 4, characterized in that, The bottom of the hoisting support plate (11e) is folded inward, and the folded end of the hoisting support plate (11e) is inserted into the host (2) and connected to the bottom surface of the host (2).
7. The hoisting structure as described in claim 1, characterized in that, The storage box (1) is provided with a storage cavity (12), the bottom of the storage cavity (12) is open to store the clothes drying rod (3), and the opening end of the storage cavity (12) is provided with a pair of conical surfaces (12a), the conical surfaces (12a) are centrally located in the storage box (1) to guide the clothes drying rod (3) to be centrally stored; The top of the storage box (1) has a through opening (13), and the cable of the receiver (21) is threaded through the through opening (13).
8. A concealed clothes drying rack, characterized in that, include: The hoisting structure as described in any one of claims 1-7; A clothes drying rod (3) is provided with a hanging block (31) which is slidably mounted on it. The top of the hanging block (31) is connected to the cable of the recharge machine (21). Several hanging holes (32) are provided on the clothes drying rod (3) for hanging clothes.
9. The concealed clothes drying rack as described in claim 8, characterized in that, The clothes drying rod (3) includes a main rod (33) and a secondary rod (34). The top of the main rod (33) is provided with a reinforcing rib (33a), the hanging hole (32) is opened on the reinforcing rib (33a), the hanging block (31) is slidably disposed on the reinforcing rib (33a), and; The top of the reinforcing rib (33a) is provided with a snap-fit strip (33b), the width of the snap-fit strip (33b) is greater than the width of the reinforcing rib (33a), and the hanging block (31) is inserted into the snap-fit strip (33b) to suspend the main rod (33). The auxiliary rod (34) is connected to the bottom of the main rod (33) via a telescopic part (35).
10. The concealed clothes drying rack as described in claim 9, characterized in that, The telescopic part (35) includes a telescopic buckle (35a) and a telescopic spring (35b); The telescopic buckle (35a) is engaged in the auxiliary rod (34), one end of the telescopic spring (35b) is hung on the pin of the telescopic buckle (35a), and the other end of the telescopic spring (35b) is connected to a steel wire rope (35c). The end of the steel wire rope (35c) extends out of the auxiliary rod (34) and is fixedly connected to the main rod (33).
11. The concealed clothes drying rack as described in claim 10, characterized in that, The bottom of the main rod (33) is provided with a fitting cavity (33c), and a fitting buckle (33d) is provided in the fitting cavity (33c). The top of the sub-rod (34) is provided with a bonding strip (34a), which is adapted to be housed in the bonding cavity (33c) and can be fastened by the bonding buckle (33d).