Buckle connecting piece, connecting structure and vehicle

Abstract

The utility model belongs to the technical field of buckles, and discloses a buckle connecting piece, a connecting structure and a vehicle. On the buckle connecting piece, the clamping part and the protruding part are arranged on the peripheral wall of the base body at intervals in the extending direction of the base body, the limiting part is arranged at one end of the base body and protrudes out of the periphery of the base body, and the protruding part is located between the clamping part and the limiting part. The buckle connecting piece is simple in structure, the positioning effect of the buckle connecting piece in the hole diameter direction is improved, and therefore the reliability and safety of connection are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of buckles, especially to a buckle connecting piece, a connecting structure and a vehicle. BACKGROUND

[0002] To meet the requirements of modeling, performance, size, etc., the body in white usually has multiple through cavities. The cavity partition is generally arranged in each sub-assembly system of the body in white to block the air flow in the cavity, reduce noise transmission and improve the driving experience. Currently, before each sheet metal assembly is combined, the cavity partition is usually assembled to the vehicle body in the form of a buckle clamping.

[0003] In the prior art, the buckle generally includes a buckle cap, a plug rod and a clamping tooth. The root of the plug rod is arranged on the buckle cap, and the connecting end of the clamping tooth is arranged on the peripheral wall of the plug rod. From the connecting end of the clamping tooth to the free end, the clamping tooth gradually extends outward and away from the plug rod. When the clamping tooth passes through the plug-in hole, the clamping tooth is bent toward the plug rod side and close to the plug rod under the compression action of the hole wall of the plug-in hole. In order to enable the clamping tooth to smoothly pass through the plug-in hole, a gap for accommodating the clamping tooth in the bent state is reserved between the plug rod and the hole wall.

[0004] In the buckle with only one level of clamping tooth, after the clamping tooth passes through the plug-in hole, the buckle is mainly positioned by the plug rod and the hole wall, and the existence of the above-mentioned gap causes the buckle to shake in the hole diameter direction, which affects the stability of the buckle. In the buckle with multiple levels of clamping tooth, the buckle is positioned by the clamping tooth in the plug-in hole and the hole wall. Since the clamping tooth has the characteristic of adaptive deformation under stress, the positioning of the buckle in the hole diameter direction is still not stable enough. SUMMARY

[0005] One purpose of the utility model is to provide a buckle connecting piece, which aims to solve the problem of unstable positioning of the existing buckle in the hole diameter direction.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The buckle connecting piece includes a base body, a clamping part, a protruding part and a limiting part. The clamping part and the protruding part are arranged on the outer peripheral wall of the base body in the extension direction of the base body, the limiting part is arranged at one end of the base body and protrudes from the outer periphery of the base body, and the protruding part is located between the clamping part and the limiting part.

[0008] Optionally, in the extension direction of the base body, the side end face of the protruding part close to the clamping part is a guide surface, and the guide surface is inclined from the base body to the limiting part.

[0009] Optionally, in the extension direction of the base body, one end of the protruding part extends to the limiting part.

[0010] Optionally, the end of the base body away from the limiting part is a guide end, and the cross section of the guide end gradually decreases in the direction of the limiting part pointing to the clamping part.

[0011] Optionally, the connecting end of the clamping part is arranged on the outer peripheral wall of the base body, and the clamping part gradually moves away from the base body and inclines to the limiting part from the connecting end to the free end of the clamping part.

[0012] Optionally, the included angle between the clamping part and the base body is 50°-60°.

[0013] Optionally, a plurality of clamping parts are arranged on the outer peripheral wall of the base body in the extension direction of the base body, and the spacing between adjacent clamping parts is 1mm-2mm.

[0014] Another purpose of the utility model is to provide a connecting structure, improve the stability of the buckle in the hole diameter direction positioning, improve the connection reliability of the connecting structure.

[0015] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0016] A connecting structure, the connecting structure includes first component, second component and above-mentioned buckle connecting piece, first component is connected with second component through buckle connecting piece.

[0017] Optionally, the first component is a cavity partition, the second component is a vehicle body sheet metal part, the cavity partition is provided with a first jack, the vehicle body sheet metal part is provided with a second jack, the base body passes through the first jack and the second jack, the limiting part is stopped on one side of the cavity partition, one side of the vehicle body sheet metal part is stopped with the clamping part, and the protruding part is located in the first jack and / or the second jack.

[0018] Optionally, the cavity partition is provided with a stepped positioning groove, and the limiting part is limited in the stepped positioning groove.

[0019] Another purpose of the utility model is to provide a vehicle, improve the connection reliability of the cavity partition, and improve the partition effect of the cavity.

[0020] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0021] A vehicle, including above-mentioned connecting structure.

[0022] The utility model has the advantages of:

[0023] The buckle connecting piece, the connecting structure and the vehicle provided by the utility model are characterized in that the one end of the base body away from the limiting part is inserted into the insertion hole, the clamping part is bent towards the base body under the action of the insertion hole when passing through the insertion hole, and the clamping part restores to the open state after passing through the insertion hole, thereby the clamping part and the limiting part jointly limit the position of the buckle connecting piece in the extension direction of the base body, the protruding part is arranged on the outer peripheral wall of the base body and is located between the clamping part and the limiting part, the protruding part stays in the insertion hole after the buckle connecting piece is clamped, at this time, the protruding part positions the inner wall of the insertion hole, thereby the buckle connecting piece is less likely to shake compared with the insertion hole, and the stability of the buckle connecting piece in the hole diameter direction is improved. Moreover, the increase of the protruding part further strengthens the structural strength of the base body and improves the reliability of the buckle connecting piece. The connecting structure adopts the improved buckle connecting piece, and the connection is more compact and stable, and the loosening and separation caused by vibration and bumping during the driving of the vehicle are effectively prevented. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic view of the buckle connecting piece provided by the utility model embodiment;

[0025] Figure 2 It is the front view of the buckle connecting piece provided by the utility model embodiment;

[0026] Figure 3 It is one side view of the buckle connecting piece provided by the utility model embodiment;

[0027] Figure 4 It is another side view of the buckle connecting piece provided by the utility model embodiment;

[0028] Figure 5 It is the schematic view of the connecting structure when the buckle connecting piece is connected;

[0029] Figure 6 It is the schematic view of the partition connecting structure provided by the utility model embodiment;

[0030] Figure 7 It is Figure 6 The cross-sectional view of the buckle connecting piece at the first insertion hole and the second insertion hole.

[0031] In the drawing:

[0032] 100, base body; 101, guide end; 102, lightening groove; 103, small hole;

[0033] 200, clamping part; 201, connecting end; 202, free end;

[0034] 300, protruding part; 301, guide surface;

[0035] 400, limiting part;

[0036] 500, first component; 501, first insertion hole; 502, stepped positioning groove;

[0037] 600, second component; 601, second insertion hole. DETAILED DESCRIPTION

[0038] The technical solutions of the utility model will be further illustrated below in combination with the drawings and through specific embodiments.

[0039] In order that the objects, technical solutions and advantages of the embodiments of the utility model are more apparent, the technical solutions in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only some of the embodiments of the utility model, but not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0040] Therefore, the detailed description of the embodiments of the utility model provided in the drawings below is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0041] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0042] In the description of the utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0043] In the description of the utility model, need explain further, unless another explicit provision and limitation, term "arrange", "connect" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection. For ordinary skilled in the art, can understand the concrete meaning of the above terms in the utility model according to specific circumstances.

[0044] In the utility model, unless another explicit provision and limitation, first feature is "on" or "under" second feature can include that first and second features are directly contacted, also can include that first and second features are not directly contacted but are contacted through additional features between them. Moreover, first feature is "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or just indicates that the horizontal height of first feature is higher than second feature. First feature is "under", "below" and "lower surface" of second feature includes that first feature is directly below and obliquely below second feature, or just indicates that the horizontal height of first feature is less than second feature.

[0045] In the description of the utility model, the term "and / or" is only a kind of description associated relationship of associated object, it indicates that there can be three kinds of relations, for example, A and / or B, can indicate: there are three kinds of situations, A exists alone, A and B exist simultaneously, B exists alone.In addition, the character " / " in the utility model generally indicates that the front and rear associated objects are a kind of "or" relationship.

[0046] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0047] As Figures 1-4 Indicated, the present embodiment provides a kind of buckle connector. Specifically, buckle connector includes base body 100, clamping portion 200, protruding portion 300 and limiting portion 400.

[0048] As Figures 1-4 Indicated, along the extension direction of base body 100, clamping portion 200 and protruding portion 300 are arranged on the outer wall of base body 100 with interval, limiting portion 400 is arranged at one end of base body 100, and protrudes from the outer periphery of base body 100, protruding portion 300 is located between clamping portion 200 and limiting portion 400. Base body 100 is used to connect and support other components, and passes through the jack. Limiting portion 400 cooperates with clamping portion 200 to realize the limiting in insertion direction. The shape of protruding portion 300 is not limited, for example, cylindrical or boss shape etc.

[0049] The buckle connector provided by the embodiment is inserted into the insertion hole from the end of the base body 100 away from the limiting portion 400. When the clamping portion 200 passes through the insertion hole, the clamping portion 200 is bent towards the base body 100 under the action of the insertion hole. After passing through the insertion hole, the clamping portion 200 returns to the open state. Thus, the clamping portion 200 and the limiting portion 400 jointly limit the position of the buckle connector in the extension direction of the base body 100. The protruding portion 300 is arranged on the outer peripheral wall of the base body 100 and is located between the clamping portion 200 and the limiting portion 400. After the buckle connector is clamped, the protruding portion 300 stays in the insertion hole. At this time, the protruding portion 300 positions the inner wall of the insertion hole, so that the buckle connector is less likely to shake compared with the insertion hole, thereby improving the stability of the buckle connector in the hole diameter direction. Moreover, the increase of the protruding portion 300 further strengthens the structural strength of the base body 100 and improves the reliability of the buckle connector. In summary, the buckle connector of the embodiment has a simple structure and improves the positioning effect of the buckle connector in the hole diameter direction, thereby improving the reliability and safety of the connection.

[0050] The buckle connector as a whole can be formed by an injection molding process, and has a light structure and low cost. Moreover, the clamping portion 200 can have good elasticity, facilitating assembly of the buckle connector. Exemplarily, the buckle connector is formed by injection molding of polyhexamethylene adipamide (PA66) material. Exemplarily, as shown in Figure 1 , the buckle connector is formed by injection molding through a specific injection mold. The base body 100 of the buckle connector has a small hole 103, which is determined and formed by the specific injection mold and does not limit the technical solutions of the patent.

[0051] The cross-sectional shape of the buckle connector can be circular, rectangular, etc., thereby being suitable for circular, rectangular, etc. insertion holes. In order to facilitate the operator to distinguish, especially from the common circular buckle, the cross-section of the buckle connector in the embodiment is rectangular as a whole, which is suitable for a rectangular hole and is distinguished from a circular buckle to reduce manual assembly errors. As shown in Figure 2 and Figure 4 , the two side walls of the base body 100 in the first direction are symmetrically provided with the clamping portion 200, facilitating force balance. The two sides of the base body 100 in the second direction are provided with the lightening groove 102, which is beneficial to lightening.

[0052] The size of the base 100 and the two side clamping portions 200 in the first direction is greater than the corresponding size of the insertion hole, so that the clamping portion 200 can play a clamping role. In the embodiment, the size of the rod portion and the two side clamping portions 200 in the first direction is greater than the corresponding size of the insertion hole by 0.5-1.5 mm. Within this size range, the insertion smoothness and clamping reliability of the buckle connector can be effectively balanced. For example, the size is 1 mm, which effectively ensures the reliable connection of the clamping portion 200. The size of the rod portion and the two side clamping portions 200 in the first direction is 11 mm, and the length of the insertion hole is 10 mm.

[0053] The width of the base 100 in the second direction is slightly smaller than the corresponding size of the insertion hole, which provides stiffness support for the buckle connector and also plays a limiting role in the second direction. In the embodiment, the size of the base 100 in the second direction is smaller than the corresponding size of the insertion hole by 0.5-1.5 mm. Within this size range, the insertion convenience of the buckle connector and the limiting effect in the second direction can be effectively balanced. For example, the size is 1 mm, which effectively ensures the stable limiting of the buckle connector. The size of the base 100 in the second direction is 5 mm, and the width of the insertion hole is 6 mm.

[0054] The limiting portion 400 plays a limiting role in the insertion direction, and also relieves the finger pressure of the operator. In the embodiment, the size of the limiting portion 400 and the base 100 in the first direction is 14 mm, and the size of the limiting portion 400 and the base 100 in the second direction is 9 mm.

[0055] As shown in Figures 1-2 Optionally, in the extension direction of the base 100, the side end face of the protruding portion 300 close to the clamping portion 200 is a guide surface 301, and the guide surface 301 is inclined from the base 100 to the limiting portion 400. In other words, in the direction of the clamping portion 200 pointing to the limiting portion 400, the guide surface 301 gradually moves away from the base 100. When the buckle connector is inserted into the insertion hole, the guide surface 301 can effectively guide the buckle connector to be inserted into the insertion hole in the correct direction, reduce the installation difficulty or error caused by insertion deviation, and improve the assembly efficiency. The guide surface 301 can be a plane or an arc surface, which can be selected according to the use scene. Further, the surface of the guide surface 301 is polished to reduce the resistance during insertion.

[0056] As shown in Figures 1-2As shown, optionally, one end of the protruding part 300 extends to the limiting part 400 in the extension direction of the base 100. The protruding part 300 extends to the limiting part 400, thereby increasing the coverage of the protruding part 300 in the insertion direction, increasing the positioning contact surface, improving the positioning effect of the snap connector in the hole diameter direction, and enhancing the connection stability of the snap connector. In other embodiments, the protruding part 300 can also be arranged separately from the limiting part 400 and can be reasonably arranged in the insertion hole.

[0057] As shown in Figure 1 , Figure 2 and Figure 4 , optionally, the end of the base 100 away from the limiting part 400 is a guide end 101, and the cross section of the guide end 101 gradually decreases in the direction of the clamping part 200 directed by the limiting part 400. The cross section of the guide end 101 gradually decreases, providing a guiding effect for insertion, making the insertion operation easier.

[0058] In this embodiment, the snap connector is used to adapt to a square hole, the cross section of the guide end 101 is rectangular, and the cross section of the protruding part 300 and the base 100 as a whole is rectangular. The guide end 101 is in the form of a prism with smooth edges, further reducing the resistance during insertion, thereby improving the assembly efficiency.

[0059] When the snap connector is used to adapt to other shapes of insertion holes, the cross section of the guide end 101, the cross section shape of the protruding part 300 and the base 100 as a whole, and the cross section shape of the base 100 and the clamping part 200 as a whole change with the shape of the insertion hole, for example, the cross section can be circular, polygonal, or triangular, etc.

[0060] As shown in Figures 1-2 , optionally, the connecting end 201 of the clamping part 200 is arranged on the outer peripheral wall of the base 100, and from the connecting end 201 of the clamping part 200 to the free end 202, the clamping part 200 gradually moves away from the base 100 and is inclined to the limiting part 400. That is, from the axis of the base 100 to the outer periphery, the tooth tip of the clamping part 200 is inclined to the pulling-out direction of the snap connector. During insertion, the inclined tooth tip can reduce the insertion resistance, making the insertion operation smoother. At the same time, during normal use, the inclined tooth tip can still provide significant clamping resistance, and only when a large pulling-out force is applied, the snap connector can be pulled out.

[0061] In some embodiments, the angle between the snap-fit ​​portion 200 and the base 100 is 50°-60°. This angle range ensures good connectivity of the snap-fit ​​connector while also balancing the ease of insertion and removal. When the angle between the snap-fit ​​portion 200 and the base 100 is less than 50°, the opening range of the snap-fit ​​portion 200 is too small, reducing the snap-fit ​​effect between the snap-fit ​​connector and the insertion hole, resulting in poor connection reliability and difficulty in meeting usage requirements. When the angle between the snap-fit ​​portion 200 and the base 100 exceeds 60°, the insertion and extraction force of the snap-fit ​​connector is too large, reducing the ease of assembly and disassembly, and the snap-fit ​​portion 200 is at risk of breakage, affecting disassembly. Preferably, the angle between the snap-fit ​​portion 200 and the base 100 is 55°, and the angle with the plane perpendicular to the insertion hole is 35°, making its insertion and extraction force particularly suitable for the vehicle field. In other embodiments, the angle between the snap-fit ​​portion 200 and the base 100 may be 51°, 52°, 53°, 54°, 56°, 57°, 58° or 59°, etc.

[0062] Optionally, multiple snap-fit ​​portions 200 are provided at intervals along the extending direction of the base 100, with a spacing of 1mm-2mm between adjacent snap-fit ​​portions 200. The multiple snap-fit ​​portions 200 enable the snap-fit ​​connector to be compatible with insertion holes of different depths, improving its adaptability. The 1mm-2mm spacing between adjacent snap-fit ​​portions 200 avoids problems such as excessive interference or looseness in the insertion direction of the snap-fit ​​connector. In this embodiment, the spacing between adjacent snap-fit ​​portions 200 can be 1.6mm.

[0063] like Figures 5-7 As shown, this embodiment also provides a connection structure, which includes a first component 500, a second component 600, and the aforementioned snap-fit ​​connector. The first component 500 is connected to the second component 600 via the snap-fit ​​connector. The connection between the first component 500 and the second component 600 via the snap-fit ​​connector makes the connection more stable and reliable.

[0064] like Figure 5 As shown, the first component (not shown in the figure) is provided with a snap-fit ​​connector, and the second component 600 is provided with a second insertion hole 601. By snapping the snap-fit ​​connector into the second insertion hole 601, the first component and the second component 600 are snapped together, resulting in better connection stability.

[0065] The connection structure can be a partition connection structure, such as... Figure 6 As shown, optionally, the first component 500 is a cavity partition, and the second component 600 is a body sheet metal part. The cavity partition is provided with a first insertion hole 501, and the body sheet metal part is provided with a second insertion hole 601. The base 100 passes through the first insertion hole 501 and the second insertion hole 601. The limiting part 400 stops on one side of the cavity partition, and the stop on one side of the body sheet metal part has a snap-fit ​​part 200. The protrusion 300 is located in the first insertion hole 501 and / or the second insertion hole 601.

[0066] The connecting structure adopts the buckle connecting piece, so that the connection between the cavity partition and the vehicle body sheet metal part is more compact and stable, and loosening and separation caused by vibration and bumping during vehicle driving are effectively prevented.

[0067] As shown in Figure 7 In some embodiments, the protruding part 300 is only located in the first jack 501 or only located in the second jack 601, so that one of the cavity partition and the vehicle body sheet metal part is closely positioned with the buckle connecting piece in the hole diameter direction, has better connection stability, and is convenient for assembly.

[0068] In some embodiments, the protruding part 300 is located in the first jack 501 and the second jack 601 at the same time, so that both the cavity partition and the vehicle body sheet metal part are closely positioned with the buckle connecting piece in the hole diameter direction, the connection stability is better, and the assembly precision is higher.

[0069] Optionally, a stepped positioning groove 502 is arranged on the cavity partition, and the limiting part 400 is limited in the stepped positioning groove 502. The stepped positioning groove 502 arranged on the cavity partition can limit the limiting part 400 of the buckle connecting piece, ensure the position accuracy and stability of the buckle connecting piece after installation, avoid the limiting part 400 of the buckle connecting piece from deviating or shaking, increase the connection reliability of the buckle connecting piece, and thus increase the connection reliability of the connecting structure.

[0070] The embodiment also provides a vehicle, which comprises the connecting structure. By adopting the connecting structure, on the one hand, the vehicle interior noise can be effectively reduced, and the driving experience can be improved, and on the other hand, the connecting structure is reliable in connection and not easy to fall off, so that the safety and reliability of the vehicle are improved.

[0071] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A snap connector characterized by comprising: The buckle connector comprises: a base body (100), a clamping portion (200) and a protruding portion (300), which are arranged on the outer wall of the base body (100) in the extension direction of the base body (100); a limiting portion (400) arranged at one end of the base body (100) and protruding from the outer wall of the base body (100), wherein the protruding portion (300) is located between the clamping portion (200) and the limiting portion (400).

2. The buckle assembly of claim 1, wherein, In the extension direction of the base body (100), one side end surface of the protruding portion (300) close to the clamping portion (200) is a guide surface (301) which is inclined from the base body (100) to the limiting portion (400).

3. The buckle assembly of claim 1, wherein, In the extension direction of the base body (100), one end of the protruding portion (300) extends to the limiting portion (400).

4. The buckle assembly of any one of claims 1-3, wherein, The end of the base body (100) away from the limiting portion (400) is a guide end (101), and the cross section of the guide end (101) gradually decreases in the direction of the limiting portion (400) pointing to the clamping portion (200).

5. The buckle assembly of any one of claims 1-3, wherein, The connecting end (201) of the clamping portion (200) is arranged on the outer wall of the base body (100), and the clamping portion (200) gradually moves away from the base body (100) and inclines to the limiting portion (400) from the connecting end (201) to the free end (202) of the clamping portion (200).

6. The buckle assembly of claim 5, wherein, The angle between the clamping portion (200) and the base body (100) is 50°-60°.

7. The buckle assembly of any one of claims 1-3, wherein, In the extension direction of the base body (100), the outer wall of the base body (100) is provided with a plurality of clamping portions (200) at intervals, and the spacing between adjacent clamping portions (200) is 1mm-2mm.

8. A connection structure comprising a first component (500) and a second component (600), characterized in that The connecting structure further comprises the buckle connector according to any one of claims 1-7, and the first component (500) is connected to the second component (600) through the buckle connector.

9. The connection structure according to claim 8, characterized in that The first component (500) is a hollow partition, the second component (600) is a vehicle body sheet metal part, the hollow partition is provided with a first jack (501), the vehicle body sheet metal part is provided with a second jack (601), the base body (100) passes through the first jack (501) and the second jack (601), the limiting portion (400) is stopped on one side of the hollow partition, one side of the vehicle body sheet metal part is stopped by the clamping portion (200), and the protruding portion (300) is located in the first jack (501) and / or the second jack (601).

10. The connection structure according to claim 9, wherein The hollow partition is provided with a stepped positioning groove (502), and the limiting portion (400) is limited in the stepped positioning groove (502).

11. A vehicle characterized by comprising: The vehicle comprises the connecting structure according to any one of claims 8-10.

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