Normally closed switch structure

Abstract

The utility model relates to the technical field of switches, and discloses a normally closed switch structure, which is characterized by comprising a shell, terminals are arranged in the shell, and the ends, located in the shell, of the terminals extend towards each other to form contact parts; a spring and a special-shaped conducting ring are arranged between the terminals; the special-shaped conducting ring comprises an annular conducting part and an opening part; the two sides of the annular conductive part abut against the contact parts respectively, and when the key is pressed down, the annular conductive part is separated from the contact parts. The special-shaped conducting ring abuts against the contact portions of the two terminals to achieve conduction of the two terminals, so that the switch is normally closed, the structure that the key drives the special-shaped conducting ring and the spring pushes the special-shaped conducting ring and the key to reset can easily achieve switching of the opening state and the closing state, the structure is simple, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a normally closed switch structure. Background Art

[0002] Push button switches are commonly used in daily life. They are switches that switch the circuit by connecting or disconnecting the moving contact and the static contact. Normally open switches are common in the prior art. Although normally closed switches also appear in applications, they are often complex in structure and have high manufacturing costs. Therefore, there is a need to improve the prior art.

[0003] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Utility Model Content

[0004] The utility model provides a normally closed switch structure to solve the problems existing in the prior art.

[0005] To achieve the above object, the utility model provides the following technical solution: a normally closed switch structure, characterized in that it includes a housing; a first end of the housing is symmetrically provided with terminal mounting holes, terminals are passed through the terminal mounting holes, and ends of the terminals located in the housing extend toward each other to form contact portions;

[0006] A spring and a special-shaped conductive ring are arranged between the terminals, and the special-shaped conductive ring includes an annular conductive portion and an opening portion;

[0007] One end of the spring abuts against the first end of the shell, and the other end abuts against the annular conductive portion; a second end of the shell away from the first end is provided with a key socket, a key is slidably arranged in the key socket, an extension portion is arranged on the key toward the first end, and the extension portion is inserted into the special-shaped conductive ring through the opening;

[0008] Both sides of the annular conductive portion are respectively in contact with the contact portion, and when the key is pressed, the extending portion pushes the annular conductive portion to separate from the contact portion.

[0009] In a possible implementation, the extension portion is provided with teeth in an inverted "mountain" shape, and the central tooth is inserted into the special-shaped conductive ring from the opening; after the annular conductive portion is separated from the contact portion, the teeth on both sides of the extension portion are respectively abutted against the contact portion.

[0010] In a possible embodiment, a spring limiting groove and a spring limiting protrusion are formed at the first end of the shell, and the end of the spring away from the special-shaped conductive ring is clamped in the spring limiting groove; the spring limiting protrusion is conical and partially inserted into the end of the spring away from the special-shaped conductive ring.

[0011] In a possible embodiment, the width of the opening portion corresponds to the thickness of the central tooth of the extension portion; the width of the annular conductive portion is greater than the width of the opening portion; the annular conductive portion and the opening portion are connected by a slope surface, and when the button is pressed, the teeth on both sides of the extension portion abut against the slope surface.

[0012] In a possible implementation manner, the housing is further provided with a buckle.

[0013] In a possible implementation manner, the annular conductive portion and the spring contact portion are planar.

[0014] In a possible implementation manner, the terminal is provided with a terminal buckle, and the terminal buckle is used to fix the terminal buckle to the housing.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model provides a normally closed switch structure, which realizes conduction between two terminals by abutting the special-shaped conductive ring and the two terminal contact parts, thereby realizing the normally closed switch. The special-shaped conductive ring is driven by a key, and the spring pushes the special-shaped conductive ring and the key reset structure, which can easily realize the switching of the open and closed states. The structure is simple and easy to install.

[0017] The present invention has other characteristics and advantages, which will be apparent from the accompanying drawings and subsequent specific embodiments incorporated herein, or will be described in detail in the accompanying drawings and subsequent specific embodiments incorporated herein, which together are used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a normally closed switch structure provided by an embodiment of the utility model;

[0020] Figure 2 It is an exploded diagram of a normally closed switch structure provided by an embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the assembly of a spring and a button of a normally closed switch structure provided by an embodiment of the utility model.

[0022] Figure 4 It is a schematic diagram of the assembly of terminals and a housing of a normally closed switch structure provided in an embodiment of the utility model.

[0023] Reference numerals: 1, button; 11, extension portion; 2, special-shaped conductive ring; 21, annular conductive portion; 22, opening portion; 23, slope surface; 3, spring; 4, housing; 41, spring limiting groove; 42, spring limiting protrusion; 43, buckle; 5, terminal; 51, contact portion; 52, terminal buckle DETAILED DESCRIPTION

[0024] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0025] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0026] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0027] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0028] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0029] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0030] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0031] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0032] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] In view of the above-mentioned defects of the existing normally closed switches, the applicant, based on many years of rich practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects in the existing technology and make the normally closed switch more practical. After continuous research and design, and after repeated trial production and improvement, the present utility model with real practical value was finally created.

[0034] Please refer to Figure 1 The embodiment of the utility model provides a normally closed switch structure, characterized in that it includes a housing 4; a first end of the housing 4 is symmetrically provided with terminal mounting holes, a terminal 5 is passed through the terminal mounting holes, and one end of the terminal 5 located in the housing 4 extends toward each other to form a contact portion 51;

[0035] A spring 3 and a special-shaped conductive ring 2 are arranged between the terminals 5, and the special-shaped conductive ring 2 includes an annular conductive portion 21 and an opening portion 22;

[0036] One end of the spring 3 abuts against the first end of the housing 4, and the other end abuts against the annular conductive portion 21; a second end of the housing 4 away from the first end is provided with a key socket, a key 1 is slidably arranged in the key socket, and an extension portion 11 is arranged on the key 1 toward the first end, and the extension portion 11 is inserted into the special-shaped conductive ring 2 through the opening 22;

[0037] Both sides of the annular conductive portion 21 are in contact with the contact portion 51 respectively. When the button 1 is pressed, the extending portion 11 pushes the annular conductive portion 21 away from the contact portion 51 .

[0038] The two terminals are connected by abutting against the special-shaped conductive ring and the contact parts of the two terminals, thereby realizing the normally closed switch. The special-shaped conductive ring is driven by a button, and the spring pushes the special-shaped conductive ring and the button reset structure, which can easily realize the switching of the open and closed states. The structure is simple and easy to install.

[0039] In a possible embodiment, the extension portion 11 is provided with three teeth in an inverted "mountain" shape, and the central tooth thereof is inserted into the special-shaped conductive ring 2 through the opening portion 22; after the annular conductive portion 21 is separated from the contact portion 51, the teeth on both sides of the extension portion 11 are respectively abutted against the contact portion 51.

[0040] The central tooth of the inverted "mountain" shape of the extension portion 11 cooperates with the opening portion 22 to prevent the special-shaped conductive ring 2 from rotating and causing the normally closed switch to fail; when the button is pressed, the two side teeth of the inverted "mountain" shape replace the special-shaped conductive ring 2 to abut against the contact portions 51 on both sides respectively. Since the two side teeth occupy the position where the special-shaped conductive ring 2 originally cooperates with the contact portion 51, it can prevent the special-shaped conductive ring 2 from accidentally returning to its original position and causing the switch to be accidentally turned on.

[0041] At the same time, since the key structure is formed into an inverted "mountain" shape, excessive local injection volume can be avoided during the injection molding of the key 1, uniform thickness can be achieved, and the shrinkage problem during molding can be solved.

[0042] In a possible embodiment, a spring limiting groove 41 and a spring limiting protrusion 42 are provided at the first end of the housing 4, and the end of the spring 3 away from the special-shaped conductive ring 2 is clamped in the spring limiting groove 41; the spring limiting protrusion 42 is conical and partially inserted into the end of the spring 3 away from the special-shaped conductive ring 2. The spring 3 is prone to positional displacement due to vibration or repeated expansion and contraction during use, which may cause inaccurate resetting when pushing the special-shaped conductive ring 2 to reset, thereby causing poor contact between the special-shaped conductive ring 2 and the contact portion 51. The position of the spring 3 is fixed by providing the spring limiting groove 41 and the spring limiting protrusion 42, thereby preventing the position of the spring 3 from being offset.

[0043] In a possible embodiment, the width of the opening portion 22 corresponds to the thickness of the central tooth of the extension portion 11; the width of the annular conductive portion 21 is greater than the width of the opening portion 22; the annular conductive portion 21 and the opening portion 22 are connected by a slope surface 23, and when the button 1 is pressed, the teeth on both sides of the extension portion 11 abut against the slope surface 23.

[0044] In a possible implementation manner, the housing 4 is further provided with a buckle 43 for assembling the switch to other components.

[0045] In a possible implementation manner, the contact portion between the annular conductive portion 21 and the spring 3 is a plane.

[0046] In a possible implementation manner, the terminal 5 is provided with a terminal buckle 52, and the terminal buckle 52 is used to fix the terminal buckle 52 to the housing 4. The terminal 5 is fixed to the housing 4 by the terminal buckle 52, which is convenient for installation.

[0047] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A normally closed switch structure, characterized in that: It comprises a housing (4); a first end of the housing (4) is symmetrically provided with terminal mounting holes, a terminal (5) is passed through the terminal mounting holes, and one end of the terminal (5) located in the housing (4) extends toward each other to form a contact portion (51); A spring (3) and a special-shaped conductive ring (2) are provided between the terminals (5); the special-shaped conductive ring (2) comprises an annular conductive portion (21) and an opening portion (22); One end of the spring (3) abuts against the first end of the shell (4), and the other end abuts against the annular conductive portion (21); a second end of the shell (4) away from the first end is provided with a key socket, a key (1) is slidably arranged in the key socket, an extension portion (11) is arranged on the key (1) in the direction toward the first end, and the extension portion (11) is inserted into the special-shaped conductive ring (2) through the opening portion (22); Both sides of the annular conductive portion (21) are in contact with the contact portion (51) respectively, and when the key (1) is pressed, the extension portion (11) pushes the annular conductive portion (21) to separate from the contact portion (51).

2. The normally closed switch structure according to claim 1, characterized in that: The extension portion (11) is provided with three teeth in sequence in the shape of an inverted "mountain", and the central tooth is inserted into the special-shaped conductive ring (2) through the opening portion (22); after the annular conductive portion (21) is separated from the contact portion (51), the teeth on both sides of the extension portion (11) respectively abut against the contact portion (51).

3. The normally closed switch structure according to claim 1, characterized in that: A spring limiting groove (41) and a spring limiting protrusion (42) are formed at the first end of the housing (4); an end of the spring (3) away from the special-shaped conductive ring (2) is clamped in the spring limiting groove (41); and the spring limiting protrusion (42) is conical and partially inserted into the end of the spring (3) away from the special-shaped conductive ring (2).

4. The normally closed switch structure according to claim 2, characterized in that: The width of the opening (22) corresponds to the thickness of the central tooth of the extension (11); the width of the annular conductive portion (21) is greater than the width of the opening (22); the annular conductive portion (21) and the opening (22) are connected via a slope surface (23); when the key (1) is pressed, the teeth on both sides of the extension (11) abut against the slope surface (23).

5. The normally closed switch structure according to claim 1, characterized in that: The housing (4) is also provided with a buckle (43).

6. The normally closed switch structure according to claim 1, characterized in that: The contact portion between the annular conductive portion (21) and the spring (3) is a plane.

7. The normally closed switch structure according to claim 1, characterized in that: The terminal (5) is provided with a terminal buckle (52), and the terminal buckle (52) is used to fix the terminal buckle (52) and the housing (4).

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