A combined contact support

Abstract

The application discloses a combined contact support, which comprises a first support made of thermosetting material and used for mounting a contact bridge, and a second support made of thermoplastic material and used for mounting an armature; wherein the first support and the second support are fixed through buckling, and one of the first support and the second support is provided with at least one limiting groove, and the other is provided with at least one limiting protrusion, the limiting protrusion and the limiting groove one-to-one correspond to constitute a limiting structure; the limiting structure is combined with the buckling fixation to realize the relative fixation of the first support and the second support; one of the first support and the second support has a rotating protrusion, and the other has a rotating recess, the rotating protrusion and the rotating recess are matched and relatively rotatable; during installation, the first support and the second support relatively rotate around the matching position of the rotating protrusion and the rotating recess, and the fixation of the buckling and the matching of the limiting structure are completed after the first support and the second support relatively rotate by a predetermined angle; the application has the characteristics of more uniform stress.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical equipment and is a contactor, specifically a combination contact support for a contactor. Background Technology

[0002] Contact supports are an important component of contactors, used to support the moving contact bridge and armature components.

[0003] Currently, common contact support structures include those that are integrally constructed (thermosetting plastics) and those that consist of separately molded contact support components (thermosetting materials) and armature support components (thermoplastic materials) that work together to form a whole.

[0004] Taking a split-type contact support as an example, such as the split-type contact support and contactor disclosed in CN110211846B, its contact support part is made of thermosetting material and the support connecting plate is made of thermoplastic material. The two adopt a dovetail structure to form a linear sliding fit. The dovetail structure is also used to limit the position in two directions of height, two directions of length, and one direction of width. Finally, the snap-fit ​​structure limits the position in the other direction of width, and the assembly is completed.

[0005] The current linear sliding fit method also has a drawback. The drawback is that the dovetail groove structure of this structure is two sets. Under normal circumstances, both sets of dovetail grooves need to be forcefully applied at the same time to complete the assembly. If the force on one side is greater than that on the other side, it may cause the supporting connecting plate to tilt towards the side with less force. The force applied by the side with greater force becomes the "resistance" on the side with less force. Such an assembly effect is very unsatisfactory.

[0006] Therefore, how to improve the assembly method of contact support in this split structure is a question worth considering. Summary of the Invention

[0007] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide a combined contact support.

[0008] This application provides: a combined contact support, comprising, The first support is made of thermosetting material and is used to install the contact bridge; The second support, made of thermoplastic material, is used to mount the armature; in, The first support and the second support are fixed by snap fasteners, and one of them is provided with at least one limiting groove, and the other is provided with at least one limiting protrusion. The limiting protrusion and the limiting groove correspond one-to-one to form a limiting structure. The limiting structure and the snap fasteners are combined to achieve relative fixation of the first support and the second support. One of the first support and the second support has a rotating protrusion and the other has a rotating recess, the rotating protrusion and the rotating recess cooperating and being able to rotate relative to each other; During installation, the first support and the second support rotate relative to each other with the rotatable protrusion and rotatable recess as the fulcrum. The fixing of the buckle and the engagement of the limiting structure are completed after the first support and the second support rotate relative to each other by a predetermined angle.

[0009] In some embodiments of this application, in the length dimension, the limiting structure and the fulcrum are at a predetermined distance; in the height dimension, the first support is located above the second support, and the rotating protrusion is disposed on the surface of the first support facing the second support; the rotating recess has an opening for the rotating protrusion to enter, and the opening is opened on the surface of the second support facing the first support or on one of the surfaces of the second support in the width dimension; the length, height, and width dimensions are perpendicular to each other.

[0010] In some embodiments of this application, the limiting structure and the fulcrum are at a predetermined distance; in the height dimension, the first support is located above the second support, and the rotating protrusion is disposed on the surface of the second support facing the first support; the rotating recess has an opening for the rotating protrusion to enter, and the opening is opened on the surface of the first support facing the second support or on one of the surfaces of the first support in the width dimension; the length, height, and width dimensions are perpendicular to each other.

[0011] In some embodiments of this application, the limiting groove is formed on the first support, and the limiting groove includes at least an inlet and a through hole. The inlet is located on a surface of the first support in the width dimension, and the through hole is located on a surface of the first support adjacent to the second support in the height dimension. The shapes of the limiting groove and the limiting protrusion are configured to limit the first support and the second support in at least two directions in the height dimension.

[0012] In some embodiments of this application, the limiting groove is formed on the second support, and the limiting groove includes at least an inlet and a through hole. The inlet is located on a surface of the second support in the width dimension, and the through hole is located on a surface of the second support adjacent to the first support in the height dimension. The shapes of the limiting groove and the limiting protrusion are configured to limit the first support and the second support in at least two directions in the height dimension.

[0013] In some embodiments of this application, the limiting groove has a baffle wall that abuts against the limiting protrusion, thereby limiting the first support and the second support in one direction of the width dimension; after the buckle is fixed, it limits the first support and the second support in another direction of the width dimension.

[0014] In some embodiments of this application, the limiting protrusion has a baffle in one direction of the width dimension, and the baffle abuts against the surface where the inlet is located, thereby limiting the first support and the second support in one direction of the width dimension; after the buckle is fixed, the first support and the second support are limited in another direction of the width dimension.

[0015] In some embodiments of this application, the wall of the limiting groove is provided with an abutting protrusion. The abutting protrusion has an abutting surface and a guiding surface, and the guiding surface extends from the abutting surface to the inlet. The limiting protrusion enters from the inlet and moves along the guiding surface until it abuts against the abutting surface. The abutting surface and the limiting protrusion abut against each other to achieve limiting in one direction of the height dimension.

[0016] In some embodiments of this application, at the initial stage of installation, there is a misalignment angle A between the first support and the second support, where 180° ≥ A ≥ 15°; after the first support and the second support are rotated relative to each other by a predetermined angle, the misalignment angle A is eliminated.

[0017] In some embodiments of this application, there are two limiting grooves. Each limiting groove has an inlet for the limiting protrusion to enter. The two limiting grooves are located on both sides of the fulcrum and the inlet directions of the two limiting grooves are opposite. During installation, after the first support and the second support rotate relative to each other by a predetermined angle, each limiting protrusion enters the corresponding limiting groove.

[0018] In some embodiments of this application, an initial abutting surface is provided in the rotating recess, and an initial abutting portion is provided in the rotating protrusion; in the initial stage of installation, the initial abutting surface and the initial abutting portion abut against each other, and as the first support and the second support rotate relative to each other, the initial abutting surface and the initial abutting portion gradually move away from each other.

[0019] In some embodiments of this application, the rotating recess is provided with an end abutment surface, and the rotating protrusion has an end abutment portion; during installation, as the first support and the second support rotate relative to each other, the end abutment surface and the end abutment portion gradually approach each other, and after the locking and limiting structure is completed, the end abutment surface and the end abutment portion abut against each other.

[0020] In some embodiments of this application, the rotating recess has an opening and an internal cavity, the size of which is larger than that of the opening. At the initial stage of installation, the rotating protrusion enters the internal cavity through the opening. After the first support and the second support rotate relative to each other, the rotating protrusion is misaligned with the opening to prevent the rotating protrusion from detaching from the opening.

[0021] In some embodiments of this application, the first support and the second support, one of which is provided with a slot or a snap-fit ​​protrusion, and the other is provided with a hook, the hook forming a snap-fit ​​fixation with the slot or the snap-fit ​​protrusion.

[0022] In some embodiments of this application, the number of snap fasteners is at least two sets.

[0023] In some embodiments of this application, the second support has auxiliary mounting holes on one or both surfaces along the length dimension. The advantages of this application compared to the prior art are: The rotating installation structure, which uses the rotating protrusion and the rotating concave as fulcrums, can distribute the force evenly along the circumference during the assembly process compared to the traditional linear sliding installation. This effectively avoids problems such as one-sided force concentration and uneven force on both sides that are prone to occur in linear sliding installation, thereby improving assembly efficiency and yield. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of one embodiment of the combined contact of this application is shown; Figure 2 A schematic diagram of a first support in one embodiment of the combined contact of this application is shown; Figure 3 A schematic diagram of a second support in one embodiment of the combined contact of this application is shown; Figure 4 This invention illustrates an assembly sequence diagram of one embodiment of the combined contact support. Figure 5 An assembly sequence diagram is shown in another embodiment of the combined contact support of this application. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "electrical connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed electrical connection, a detachable electrical connection, or an integral connection; they can refer to a mechanical-electrical connection or an electro-electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example

[0031] like Figure 1-5 As shown, an embodiment of this application is a combined contact support, which is suitable for use in a contactor.

[0032] The combined contact support includes a first support 100 and a second support 200.

[0033] The first support 100 is made of thermosetting material (also called thermosetting plastic material), and the moving contact bridge of the contactor is mounted on the first support 100 and moves with the first support 100.

[0034] The second support 200 is made of thermoplastic material, and the armature of the contactor is fixed to the second support 200. When the electromagnetic system inside the contactor is energized, the armature is attracted and moves, causing the second support 200 to move along with it.

[0035] The length dimension L, height dimension H, and width dimension D (or the length direction, height direction, and width direction) are the three dimensions of a three-dimensional space. Each dimension is perpendicular to the others, and each dimension has two directions.

[0036] In the height dimension H, the first support 100 is located above the second support 200, and the first support 100 and the second support 200 are fixed together, so they can move synchronously.

[0037] The first support 100 is fixed to the second support 200 by a snap-fit ​​S, and combined with a limiting structure M, thereby ensuring the relative fixation of the first support 100 and the second support 200.

[0038] Here, there are many ways to set up the snap-fit ​​fixing S, such as the hook S1 and the slot S2 or the snap-fit ​​protrusion. Taking the hook S1 as a snap hook as an example, the structure that cooperates with it is the slot S2 or the snap-fit ​​protrusion. Taking the hook S1 as a buckle plate with a hole as an example, the structure that cooperates with it is the snap-fit ​​protrusion. Regardless of the method, as long as one is on the first support 100 and the other is on the second support 200, and the snap-fit ​​fixing S can be achieved, it is acceptable.

[0039] Here, the hook component S1 has a certain degree of elasticity; it can be disposed on the second support 200 or on the first support 100. As a preferred option, it is integrally molded with the second support 200. Since thermoplastic material is easy to form an elastic structure, it is easier to place it on the second support 200. Of course, the hook component S1 can also be molded independently of the second support 200 or independently of the first support 100, and then fixed to the first support 100 or the second support 200 by other fastening methods (such as ultrasonic welding, tight fit, etc.).

[0040] Here, the number of sets of snap-fit ​​S can be one or more. Of course, the more sets of snap-fit ​​S, the higher the fastening strength will be. As a comprehensive consideration of strength and cost-effectiveness, two sets of snap-fit ​​S are used here, on both sides of the length dimension L supported by the combined contact.

[0041] Here, the limiting structure M includes a limiting groove M1 and a limiting protrusion M2. One of the limiting groove M1 and the limiting protrusion M2 is disposed on the first support 100, and the other is disposed on the second support 200.

[0042] The number of limiting structures M can be one, two, or more.

[0043] Here, in order to make the product structure more stable and facilitate the cooperation between the two, the limiting protrusion M2 is set on the second support 200 and the limiting groove M1 is set on the first support 100. This is because the first support 100 is made of thermosetting plastic, and the groove formed therefrom will be more stable; the second support 200 is made of thermoplastic plastic, and the limiting protrusion M2 formed therefrom will have a certain degree of elasticity.

[0044] The following is a detailed introduction to the limiting structure M: The limiting groove M1 includes an inlet M10 and a through hole M20. The inlet M10 is located on a surface of the first support 100 in the width dimension D, while the through hole M20 is located on a surface of the first support 100 adjacent to the second support 200 in the height dimension H.

[0045] The limiting protrusion M2 is formed on the surface of the second support 200 adjacent to the first support 100 in the height dimension H. The limiting protrusion M2 can enter the limiting groove M1 through the inlet M10 and the through hole M20, thereby completing the limiting engagement.

[0046] Here, the shapes of the limiting protrusion M2 and the limiting groove M1 are configured to limit the first support 100 and the second support 200 in at least two directions in the height dimension H.

[0047] Taking this embodiment as an example, it has a T-shaped structure. The limiting groove M1 includes a wide groove and a narrow groove, the through hole M20 is located in the narrow groove, and the inlet M10 is on one side of the wide and narrow grooves. Similarly, the limiting protrusion M2 also includes a wide portion and a narrow portion, with the wide portion located within the wide groove and the narrow portion located within the narrow groove. The dimension of the wide portion in the length dimension L is larger than the dimension of the narrow groove in the length dimension L. The upper and lower end faces of the wide portion can respectively abut against the upper and lower groove walls of the wide groove to achieve limiting in the height dimension H. In addition to the T-shape, there are many other structural shapes that satisfy this requirement, such as dovetail grooves, L-shapes, etc. As long as there is an abutment surface in the height dimension H, limiting in the height dimension H can be guaranteed.

[0048] As a more preferred approach, the wall of the limiting groove M1 is provided with an abutment protrusion. The abutment protrusion has an abutment surface M11 and a guide surface M12, with the guide surface M12 extending from the abutment surface to the inlet M10. When the limiting protrusion M2 enters through the inlet M10 and moves along the guide surface M12 to the abutment surface M11, the abutment between the abutment surface M11 and the limiting protrusion M2 achieves limiting in one direction of the height dimension H, while the other direction is achieved by the remaining walls of the limiting groove M1. Taking the T-shaped structure above as an example, the abutment protrusion is set on the upper wall of the wide groove (achieving limiting in one direction of the height dimension H), and the lower wall of the wide groove achieves limiting in the other direction. As an alternative, the abutment protrusion can also be set on the lower wall. This structure is beneficial for achieving limiting in the height dimension H. It also facilitates a certain offset in the height dimension H during the engagement of the first contact support and the second contact support, which is beneficial for the snap-fit ​​fixation S.

[0049] There are also many ways to achieve the two-way limiting of the first support 100 and the second support 200 in the width dimension D.

[0050] One method is to achieve two-way limiting in the width dimension D by simply relying on the snap-fit ​​fixing S. This snap-fit ​​design is relatively more complex, but it can still create effective limiting.

[0051] Alternatively, the limiting groove M1 has a baffle M13 that abuts against the limiting protrusion M2, thereby limiting the first support 100 and the second support 200 in one direction of the width dimension D. After the snap-fit ​​is fixed by the clip S, the first support 100 and the second support 200 are limited in the other direction of the width dimension D. This method is very simple to install; as long as the limiting protrusion M2 is installed in place and the snap-fit ​​is fixed, it can effectively limit the movement in two directions in the width dimension D.

[0052] Alternatively, the baffle M13 can be formed on the limiting protrusion M2 in one direction of the width dimension D, with the baffle M13 abutting against the surface having the inlet M10 (i.e., the limiting protrusion M2 is already within the limiting groove M1), thus limiting the first support 100 and the second support 200 in one direction of the width dimension D. After the snap-fit ​​S is fixed, the first support 100 and the second support 200 are limited in the other direction of the width dimension D. This method also has a relatively simple structure and can effectively limit movement.

[0053] There are many ways to achieve two-way limiting of the first support 100 and the second support 200 along the length dimension L. For example, the limiting protrusion M2 and the limiting groove M1 in a single limiting structure M can have an abutment relationship in both directions of the length dimension L. For example, two sets of limiting structures M can be arranged sequentially along the length dimension L, with each set of limiting structures M having an abutment relationship in both directions of the length dimension L. For example, the limiting structure M can be combined with the snap-fit ​​fixing S to form limiting in both directions of the length dimension L, and so on. For example, a set of limiting structures M can be combined with the rotating protrusion P10 and the rotating recess P20 mentioned below to form limiting in both directions of the length dimension L, and so on.

[0054] Although the example structure above has the limiting groove M1 set on the first support 100 and the limiting protrusion M2 set on the second support 200, the two can also be interchanged, which will not be elaborated here.

[0055] One of the first support 100 and the second support 200 has a rotating protrusion P10 and the other has a rotating recess P20. The rotating protrusion P10 and the rotating recess P20 cooperate and are rotatable relative to each other.

[0056] Taking a first support 100 with a rotating recess P20 and a second support 200 with a rotating protrusion P10 as an example, when the first support 100 and the second support 200 are installed, the rotating protrusion P10 is aligned with the rotating recess P20. At this time, the first support 100 and the second support 200 are misaligned, with a misalignment angle A. Subsequently, the first support 100 and the second support 200 are driven to rotate relative to each other (with the fulcrum O of the mating point of the rotating protrusion P10 and the rotating recess P20 as the pivot point), so that the misalignment angle A is eliminated (that is, after rotating by a predetermined angle), the buckle is fixed and the limiting structure M is engaged.

[0057] This rotary installation structure, compared to the existing linear sliding installation method, enables the force during the assembly process to be evenly distributed along the circumference, effectively avoiding problems such as unilateral force concentration and uneven force on both sides that are prone to occur in linear sliding installation, thereby improving assembly efficiency and yield.

[0058] Here, there are many possible ranges for angle A, such as 30°, 60°, 90°, 110°, etc., as long as it is within the range of 180°≥A≥15°.

[0059] In the length dimension L, the limiting structure M and the fulcrum O are at a predetermined distance.

[0060] Here, in order to facilitate the entry of the limiting protrusion M2 into the corresponding limiting groove M1, the inlet of the limiting groove M1 adopts at least part of a structure Z that changes from large to small, so as to guide the limiting protrusion M2 to enter the limiting groove M1 more easily.

[0061] The rotating protrusion P10 is disposed on the surface of the first support 100 facing the second support 200 in the height dimension H.

[0062] The rotating recess P20 has an opening P2a for the rotating protrusion P10 to enter. The opening P2a is formed on the surface of the second support 200 in the height dimension H facing the first support 100. Of course, the opening P2a here can also be formed on a surface of the second support 200 in the width dimension D.

[0063] The opening P2a is positioned in such a way that the rotating protrusion P10 can extend into the rotating recess P20.

[0064] As a combination of a double-limiting structure M and a rotating protrusion P10 and a rotating recess P20, two limiting grooves M1 are respectively located on both sides of the fulcrum O. The inlets M10 of the two limiting grooves M1 have opposite directions (one inlet M10 faces one side of the width dimension D, and the other inlet M10 faces the other side). As the first support 100 and the second support 200 rotate relative to each other, each limiting protrusion M2 enters the corresponding limiting groove M1 to achieve limitation. In this double-limiting structure M distributed on both sides of the fulcrum O, during the installation of the first bracket and the second bracket, the force for each limiting protrusion M2 is the same, causing it to enter the limiting groove M1. Therefore, the force is more evenly distributed, which is more conducive to the assembly of the first support 100 and the second support 200.

[0065] In this configuration, a first rib is provided within the rotating recess P20, and the first rib has an initial abutment surface P21. A second rib is provided on the rotating protrusion P10, and the second rib has an initial abutment portion P11. Initially, the initial abutment portion P11 abuts against the initial abutment surface P21. As the first support 100 and the second support 200 rotate relative to each other, the initial abutment surface P21 and the initial abutment portion P11 gradually move away from each other. This interaction between the initial abutment surface P21 and the initial abutment portion facilitates initial positioning during installation.

[0066] In this configuration, a first rib is provided within the rotating recess P20, and the first rib has an end abutment surface P22. A second rib is provided on the rotating protrusion P10, and the second rib has an end abutment portion P12. Initially, there is a distance between the end abutment surface P22 and the end abutment portion P12. As the first support 100 and the second support 200 rotate relative to each other, the end abutment surface P22 and the end abutment portion P12 gradually approach each other. After the locking and limiting structure M of the snap fastener is engaged, the end abutment surface P22 and the end abutment portion P12 come into contact. This design of the end abutment surface P22 and the end abutment portion P12 facilitates the final engagement and limiting.

[0067] Here, the rotating recess P20 has an opening P2a and an inner cavity P2b, the size of which is larger than that of the opening P2a. The rotating protrusion P10 has a shape P1a that fits the opening P2a. Initially, the rotating protrusion P10 enters the inner cavity P2b through the opening P2a. After the first support 100 and the second support 200 rotate relative to each other, the rotating protrusion P10 is misaligned with the opening P2a to prevent it from detaching from the opening P2a. Many shapes can achieve this structure, such as D-shape, semi-circle, etc., as long as they satisfy the requirement that the rotating protrusion P10 is misaligned with the opening P2a after rotation (applying to the inner wall of the opening P2a facing the inner cavity P2b). This installation structure is beneficial for the initial positioning of the first support 100 and the second support 200, and also helps prevent them from easily detaching during rotation.

[0068] Here, this misaligned limiting structure, when applied to a single limiting structure M, can also achieve a certain height dimension H limiting effect.

[0069] Although the structure in the example above has the rotating recess P20 set on the first support 100 and the rotating protrusion P10 set on the second support 200, the two can also be interchanged, which will not be elaborated here.

[0070] Regardless of the method, the second support 200 has auxiliary mounting holes 210 on both surfaces along the length dimension L. The auxiliary mounting holes 210 are used to mount side mounts (also called contactor side-mount accessories). Of course, only one auxiliary mounting hole 210 can be provided, that is, only one surface of the second support 200 along the length dimension L.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples and features described in this specification.

[0072] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A combined contact support, comprising, The first support is made of thermosetting material and is used to install the contact bridge; The second support, made of thermoplastic material, is used to mount the armature; Its features are: The first support and the second support are fixed by snap fasteners, and one of them is provided with at least one limiting groove, and the other is provided with at least one limiting protrusion. The limiting protrusion and the limiting groove correspond one-to-one to form a limiting structure. The limiting structure and the snap fasteners are combined to achieve relative fixation of the first support and the second support. One of the first support and the second support has a rotating protrusion and the other has a rotating recess, the rotating protrusion and the rotating recess cooperating and being able to rotate relative to each other; During installation, the first support and the second support rotate relative to each other with the rotatable protrusion and rotatable recess as the fulcrum. The fixing of the buckle and the engagement of the limiting structure are completed after the first support and the second support rotate relative to each other by a predetermined angle.

2. The combined contact support according to claim 1, characterized in that: In the length dimension, the limiting structure is at a predetermined distance from the fulcrum; in the height dimension, the first support is located above the second support, and the rotating protrusion is disposed on the surface of the first support facing the second support; the rotating recess has an opening for the rotating protrusion to enter, and the opening is opened on the surface of the second support facing the first support or on one of the surfaces of the second support in the width dimension; the length, height, and width dimensions are mutually perpendicular. Alternatively, in the length dimension, the limiting structure is at a predetermined distance from the fulcrum; in the height dimension, the first support is located above the second support, and the rotating protrusion is disposed on the surface of the second support facing the first support; the rotating recess has an opening for the rotating protrusion to enter, and the opening is opened on the surface of the first support facing the second support or on one of the surfaces of the first support in the width dimension; the length, height, and width dimensions are perpendicular to each other.

3. The combined contact support according to claim 2, characterized in that: The limiting groove is formed on the first support, and the limiting groove includes at least an inlet and a through hole. The inlet is located on a surface of the first support in the width dimension, and the through hole is located on a surface of the first support adjacent to the second support in the height dimension. The shapes of the limiting groove and the limiting protrusion are configured to limit the first support and the second support in at least two directions in the height dimension. Alternatively, the limiting groove is formed on the second support, and the limiting groove includes at least an inlet and a through hole. The inlet is located on a surface of the second support in the width dimension, and the through hole is located on a surface of the second support adjacent to the first support in the height dimension. The shapes of the limiting groove and the limiting protrusion are configured to limit the first support and the second support in at least two directions in the height dimension.

4. A combined contact support according to claim 3, characterized in that: The limiting groove has a baffle wall that abuts against the limiting protrusion, thereby limiting the first support and the second support in one direction of the width dimension; after the buckle is fixed, it limits the first support and the second support in another direction of the width dimension. Alternatively, the limiting protrusion has a baffle in one direction of the width dimension, and the baffle abuts against the surface where the inlet is located, thereby limiting the first support and the second support in one direction of the width dimension; after the buckle is fixed, it limits the first support and the second support in another direction of the width dimension.

5. A combined contact support according to claim 3, characterized in that: The groove wall of the limiting groove is provided with an abutting protrusion. The abutting protrusion has an abutting surface and a guiding surface. The guiding surface extends from the abutting surface to the inlet. The limiting protrusion enters from the inlet and moves along the guiding surface until it abuts against the abutting surface. The abutting surface and the limiting protrusion abut against each other to achieve limiting in one direction of the height dimension.

6. A combined contact support according to claim 1, characterized in that: At the initial stage of installation, there is a misalignment angle A between the first support and the second support, where 180° ≥ A ≥ 15°; after the first support and the second support are rotated relative to each other by a predetermined angle, the misalignment angle A is eliminated.

7. A combined contact support according to claim 1, characterized in that: There are two limiting grooves, each with an inlet for the limiting protrusion to enter. The two limiting grooves are located on both sides of the fulcrum and the inlet directions of the two limiting grooves are opposite. During installation, after the first support and the second support rotate relative to each other by a predetermined angle, each limiting protrusion enters the corresponding limiting groove.

8. A combined contact support according to claim 1, characterized in that: An initial abutment surface is provided in the rotating recess, and an initial abutment portion is provided in the rotating protrusion. In the initial stage of installation, the initial abutment surface and the initial abutment portion abut against each other. As the first support and the second support rotate relative to each other, the initial abutment surface and the initial abutment portion gradually move away from each other. And / or, the rotating recess is provided with an end abutment surface, and the rotating protrusion has an end abutment portion; during installation, as the first support and the second support rotate relative to each other, the end abutment surface and the end abutment portion gradually approach each other, and after the locking and limiting structure are completed, the end abutment surface and the end abutment portion abut against each other.

9. A combined contact support according to claim 1, characterized in that: The rotating recess has an opening and an internal cavity, the size of which is larger than that of the opening. At the initial stage of installation, the rotating protrusion enters the internal cavity through the opening. After the first support and the second support rotate relative to each other, the rotating protrusion is misaligned with the opening to prevent the rotating protrusion from detaching from the opening.

10. A combined contact support according to claim 1, characterized in that: The first support and the second support, one of which is provided with a slot or a snap-fit ​​protrusion, and the other is provided with a hook, the hook and the slot or snap-fit ​​protrusion forming a snap-fit ​​fixation; And / or, the number of clips securing the device is at least two sets; And / or, the second support has auxiliary mounting holes on one or both surfaces along the length dimension.

Images