Self-locking mechanical switch

Abstract

The utility model relates to a self-locking mechanical switch, which comprises a fixed seat coaxially sleeved on the outer side of a microswitch, and a trigger head arranged at one end of the microswitch passes through the fixed seat and extends into the inner space at the top end of a pressing cap; the top end of the pressing cap is provided with a bulge, and the bottom end of the pressing cap is connected with the fixed seat through a spring; the rotating body coaxially sleeves the outer side of the top end of the pressing cap, one end of the rotating body is provided with a transmission groove in butt joint with a key, the inner side of the other end of the rotating body is provided with contacts arranged in the circumferential direction, and the contacts interfere with the protrusions when the rotating body rotates to a set angle, push the pressing cap to compress the spring and press the trigger head; the lock shell is coaxially sleeved on the outer side of the rotating body, and a sealing ring is arranged between the lock shell and the rotating body. A key matched with the sealing ring and the specific groove in shape can be used for opening. The sealing performance and the small size are both considered, key rotating motion is converted into pressing and lifting motion on the microswitch, and the self-locking function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical accessories, in particular to a self-locking mechanical switch. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] The power control box in the power system has a variety of components inside. Take the switch as an example. In order to prevent unauthorized personnel from operating the switch without permission, a lock hole will be set on the switch and a key will be provided for a special person. Only by unlocking the switch with the key can the switch be operated. However, the sealing performance of the switch with a key is not ideal. External dust and water vapor can easily penetrate into the switch through the lock hole, resulting in a shortened service life of the switch. Although some switches have improved waterproof performance, for example, they can reach a waterproof level of IP68 or above, but they are too large and require tools to open. Utility Model Content

[0004] In order to solve the technical problems existing in the above background technology, the utility model provides a self-locking mechanical switch, which is a combined self-locking mechanical switch formed by combining a mechanical structure with a micro switch, wherein there are at least two waterproof sealing rings and a unique groove lock switch, which can only be opened with a key matching a special groove shape. It takes into account both sealing and small size, converts the key rotation movement into the pressing and lifting movement of the micro switch, and realizes the self-locking function.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A self-locking mechanical switch comprises a fixed seat coaxially sleeved on the outer side of a micro switch, a trigger head at one end of the micro switch passes through the fixed seat and extends into the internal space of the top end of a pressure cap; the pressure cap is coaxially sleeved on the outer side of the fixed seat, the top end of the pressure cap is provided with a protrusion, and the bottom end of the pressure cap is connected to the fixed seat through a spring; a rotating body is coaxially sleeved on the outer side of the top end of the pressure cap, one end of the rotating body is provided with a transmission groove for docking with a key, and the inner side of the other end is provided with contacts arranged along the circumferential direction, the contacts interfere with the protrusion when the rotating body rotates to a set angle, pushes the pressure cap to compress the spring and press the trigger head; a lock shell is coaxially sleeved on the outer side of the rotating body, and a sealing ring is provided between the lock shell and the rotating body.

[0007] Furthermore, one end of the micro switch is a trigger head, the other end is an action head, and the middle part is connected to the fixing seat. When the trigger head is axially pressed, the electrode on the action head is turned on.

[0008] Furthermore, the fixing seat has a through hole, the inner surface of the through hole is connected to the micro switch, the trigger head of the micro switch passes through the top of the through hole, the top of the through hole is a non-circular hole, and at least two groups of blind holes are evenly arranged on the outer side of the circumference of the bottom end of the fixing seat. The fastener passes through the countersunk hole of the lock shell and falls into the blind hole to prevent the fixing seat from rotating and sliding in the lock shell.

[0009] Furthermore, the lock housing is a cylindrical body, wherein at least two groups of lock housing markings are arranged on the end surface of one end, and the outer surface of the cylindrical body has a plane, and a countersunk hole is arranged in the plane for connecting and accommodating fasteners.

[0010] Furthermore, the rotating body is a cylindrical body with one end closed, one end is a closed end, and the other end is an open end. The outer end surface of the closed end is provided with a rotating body mark and a non-circular transmission groove, and the transmission groove is used to dock with the annular rib of the key.

[0011] Furthermore, at least two groups of evenly distributed sealing ring grooves and limiting grooves are provided on the circumferential outer side of the rotating body, the sealing ring grooves are close to the closed end of the cylindrical body, and the limiting grooves are close to the open end of the cylindrical body. The sealing ring grooves are used to accommodate the sealing rings, and the limiting grooves are used to accommodate fasteners.

[0012] Furthermore, the inner side of the closed end of the rotating body is a cylindrical inner wall surface for accommodating the pressure cap, and the cylindrical inner wall surface is provided with at least two contacts evenly distributed along the circumferential direction, and the contacts are arc-shaped protrusions.

[0013] Furthermore, there are multiple groups of fasteners, at least one group of fasteners passes through the countersunk holes of the lock housing and falls into the limiting grooves of the rotating body, and at least one group of fasteners passes through the countersunk holes of the lock housing and falls into the blind holes of the fixing seat.

[0014] Furthermore, the pressure cap is a rotating body structure with a flange on the outer surface, which is connected to the fixed seat through a spring; one end is closed, and the outer surface of the closed end has a protrusion, and the other end is open, and a non-circular inner wall surface is provided on the inner side of the opening for accommodating the trigger head of the micro switch.

[0015] Furthermore, the key includes a handle connected to one side of the circular disk, an annular rib is provided on the other side of the circular disk, and a key mark is provided on the handle.

[0016] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0017] 1. After the key is connected to the rotating body, the rotating body is driven to rotate, and the contact of the rotating body and the protrusion of the pressing cap cooperate to convert the rotary motion of the key into the linear motion of the pressing cap, thereby pressing the micro switch to achieve conduction. During the pressing period, the friction between the parts is used to maintain the conduction state to achieve self-locking. The overall structure is compact and the volume is small.

[0018] 2. The sealing ring between the lock housing and the rotating body is used to prevent external water vapor from invading the inside of the switch. At the same time, the micro switch is protected by the pressure cap and is not directly in contact with the external environment. It also does not have the structure of a traditional lock hole, which further enhances the sealing performance.

[0019] 3. The area of ​​the pressure cap that accommodates the micro switch trigger head and the area of ​​the fixed seat through which the trigger head passes are both non-circular holes, which can keep the movement of the pressure cap in a straight line when pressing the micro switch trigger head, ensuring reliable triggering of the micro switch.

[0020] 4. When the fastener passes through the countersunk hole of the lock housing and falls into the limiting groove of the rotating body, the rotation process of the rotating body is limited to the required angle range by the fastener in the limiting groove, forming a limiting function, further ensuring the reliable triggering of the micro switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 This is a schematic diagram of the micro switch provided by the utility model;

[0023] Figure 2 This is a schematic diagram of the combined state of the self-locking mechanical switch provided by the utility model;

[0024] Figure 3 It is a three-dimensional diagram of the lock housing in the mechanical switch provided by the utility model;

[0025] Figure 4 It is a cross-sectional view of the lock housing in the mechanical switch provided by the utility model;

[0026] Figure 5 It is a front view of the rotating body of the mechanical switch provided by the utility model;

[0027] Figure 6 It is a cross-sectional view of the rotating body provided by the utility model;

[0028] Figure 7 It is a rear view of the rotating body provided by the utility model;

[0029] Figure 8 This is a bottom view of the rotating body provided by the utility model;

[0030] Fig. 9 It is a partial cross-sectional view of the rotating body provided by the utility model;

[0031] Fig.10 It is a side view of the pressing cap provided by the utility model;

[0032] Fig.11 It is a cross-sectional view of the pressing cap provided by the utility model;

[0033] Fig.12 It is a front view of the switch fixing seat provided by the utility model;

[0034] Fig.13 It is a side view of the switch fixing seat provided by the utility model;

[0035] Fig.14 This is a cross-sectional view of the switch fixing seat provided by the utility model;

[0036] Fig.15 It is a three-dimensional diagram of the key provided by the utility model;

[0037] Fig.16 It is a cross-sectional view of the self-locking mechanical switch provided by the utility model;

[0038] Fig.17 This is a three-dimensional diagram of the self-locking mechanical switch provided by the utility model with a key;

[0039] Fig.18 The utility model is a schematic diagram of the installation of a self-locking mechanical switch.

[0040] In the figure: 1 micro switch, 2 trigger head, 3 fixed thread, 4 lock shell, 5 lock shell thread, 6 rivet, 7 rotating body, 8 transmission groove, 9 lock shell countersunk hole, 10 lock shell mark a, 11 lock shell mark b, 12 rotating body mark, 13 sealing ring groove, 14 limit groove, 15 contact, 16 cylindrical inner wall, 17 pressure cap, 18 wavy protrusion, 19 flange, 20 square inner wall, 21 fixed seat, 22 square limit column, 23 blind hole, 24 thread, 25 key, 26 annular rib, 27 key mark, 28 O-ring, 29 spring, 30 chassis shell, 31 sealing gasket, 32 nut. DETAILED DESCRIPTION

[0041] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0042] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0043] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] The following embodiment provides a self-locking mechanical switch, which is a combined self-locking mechanical switch formed by combining a mechanical structure with a micro switch, wherein the switch has at least two waterproof sealing rings and a unique groove-type lock switch, which can only be opened by a key that matches a special groove shape. It takes into account both sealing performance and small size, converts the key rotation movement into the pressing and lifting movement of the micro switch, and realizes the self-locking function.

[0045] A self-locking mechanical switch comprises a fixing seat 21 coaxially sleeved on the outer side of a micro switch 1, a trigger head 2 provided at one end of the micro switch 1 passes through the fixing seat 21 and extends into the internal space at the top end of a pressure cap 17; the pressure cap 17 is coaxially sleeved on the outer side of the fixing seat 21, the top end of the pressure cap 17 is provided with a protrusion 18, and the bottom end of the pressure cap 17 is connected to the fixing seat 21 through a spring 29; a rotating body 7 is coaxially sleeved on the outer side of the top end of the pressure cap 17, one end of the rotating body 7 is provided with a transmission groove 8 docking with a key 25, and the inner side of the other end is provided with a contact 15 arranged along the circumferential direction, and the contact 15 interferes with the protrusion 18 when the rotating body 7 rotates to a set angle, pushing the pressure cap 17 to compress the spring 29 and press the trigger head 2; a lock housing 4 is coaxially sleeved on the outer side of the rotating body 7, and a sealing ring is provided between the lock housing 4 and the rotating body 7.

[0046] like Figure 1 As shown, the micro switch 1 is a finished product that can be purchased on the market and can be regarded as a standard part. One end of the micro switch 1 is a trigger head 2, the other end is an action head, and the middle part has a fixed thread 3 for fixing the micro switch 1. The micro switch trigger head 2 can be axially pressed to turn on the electrode of the action head. The micro switch 1 selected in this embodiment is a non-self-locking micro switch, that is, when the trigger head 2 of the micro switch is released, the switch is no longer turned on. Only when the trigger head 2 is continuously pressed, the electrode of the action head can maintain a continuous conduction state.

[0047] In this embodiment, the electrodes on the actuating head of the micro switch 1 are used to connect to the corresponding control element, which will not be described in detail in this embodiment.

[0048] like Figure 2 As shown, this embodiment is used in combination with the micro switch 1, so that the micro switch 1 can be transformed into a self-locking mechanical lock switch with a password key and has good waterproof performance. Figure 2In the embodiment, the rear section of the lock housing 4 is the lock housing thread 5, which is used to fix the lock body on the chassis. The lock housing thread 5 is a thread with flat surfaces on both sides, which can be used to stop rotation when matched with the waist-shaped hole on the chassis. There are also rivets 6 on the plane of the lock housing thread 5 for fixing internal parts. The rotating body 7 rotates in the cylinder of the lock housing 4 to achieve the compression and loosening of the trigger head 2 of the micro switch 1, thereby realizing the power on / off function.

[0049] like Figure 3 As shown, the lock housing 4 is a cylindrical body, and there are two marks on the front, namely, the lock housing mark a10 and the lock housing mark b11. In this embodiment, the lock housing mark a10 is the lock housing zero mark and the lock housing mark b11 is the lock housing 90 degree mark. The front of the lock housing 4 is regarded as a clock, the lock housing zero mark 10 is at the 0 o'clock position, and the lock housing 90 degree mark 11 is at the 3 o'clock position. The rotation of the rotating body 7 in the lock housing 4 is also limited to a rotation range of 90 degrees.

[0050] like Figure 4 As shown, a lock case countersunk hole 9 is provided on the lock case 4 for placing the rivet 6. The lock case countersunk hole 9 is a stepped hole, which is adapted to the shape of the rivet 6 and has an interference fit during assembly to prevent the rivet 6 from falling off.

[0051] like Figure 5 As shown, the front view of the rotating body 7, the rotating body mark 12 is provided at the zero o'clock position on the front of the rotating body 7, which is used to observe the angle of the rotating body 7 itself when in use. A transmission groove 8 is provided on the front, which is a non-circular groove, for example, a circular arc with concave upper and lower parts, for docking with the key 25. Fig.15 The key 25 is provided with an annular rib 26. The shape of the annular rib 26 matches the transmission groove 8. When the annular rib 26 on the key 25 is inserted into the transmission groove 8, since the transmission groove 8 is not a perfect circle, when the key 25 is rotated, the rotating body 7 is driven to rotate, realizing the function of switching the lock.

[0052] like Figure 6 As shown, the cross section of the transmission groove 8 on the rotating body 7 can be rectangular. Two sealing ring grooves 13 are provided on the side of the rotating body 7 for placing sealing rings (such as O-rings 28) to achieve sealing between the rotating body 7 and the lock housing 4. Two limiting grooves 14 are evenly distributed on the outer circumference of the bottom of the rotating body 7.

[0053] Figure 6 In the embodiment, the inner wall of the rotating body 7 is a cylindrical inner wall 16 for accommodating the pressing cap 17 and having a relative rotational cooperation motion with the pressing cap 17. If the rotating body 7 is regarded as a cup-shaped body, two contact points 15 are arranged at the inner bottom thereof, which are convex structures uniformly distributed around the circumference.

[0054] like Figure 7 As shown, it can be seen that the contact 15 is an arc-shaped protrusion, and its arc length will affect the triggering angle position of the lock switch.

[0055] like Figure 8-Figure 9 As shown, the limiting groove 14 is an arc-shaped groove with a length of 1 / 4 of the circumference of the rotating body 7. The arc angle of each limiting groove 14 is slightly greater than 90 degrees, and the two arc-shaped grooves are evenly distributed around the circumference.

[0056] like Fig.10 As shown, the pressing cap 17 is a body of revolution. A flange 19 is provided on the outer surface, and two wave-shaped protrusions 18 are provided at one end.

[0057] like Figure 11-Figure 12 As shown, the two sides of the wave-shaped protrusion 18 are gentle slopes, and the middle is a circular arc protrusion. The inside of the pressure cap 17 has a square inner wall 20.

[0058] like Figure 13-14 As shown, the micro switch 1 is installed inside the fixing seat 2, and the micro switch thread 3 cooperates with the fixing seat thread 24. The trigger head 2 extends from the hole of the square limit column 22 at the front end of the fixing seat 21. Two blind holes 23 are set on the fixing seat 21, and the fixing seat 21 and the lock housing 4 are fixed by two rivets 6. The rivet 6 passes through the lock housing countersunk hole 9 of the lock housing 4 and falls into the blind hole 23 of the fixing seat 21 to prevent the fixing seat 21 from rotating and sliding in the lock housing.

[0059] like Fig.15 As shown, the key 25 includes a handle and a circular disk, the bottom surface of the circular disk has an annular rib 26, and the top surface of the key also has a key mark 27.

[0060] Fig.16 The assembly relationship of each component is shown. The rotating body 7 is installed in the lock housing 4 and fixed by two rivets 6. The two rivets 6 respectively pass through the lock housing countersunk holes 9 of the lock housing 4 and fall into the two limiting grooves 14 of the rotating body 7. Since the limiting grooves 14 are arc-shaped grooves, the rivets 6 can slide in the limiting grooves 14, that is, the rotation angle of the rotating body 7 can be limited by the rivets 6. Fig. 9 As can be seen from the figure, the arc length of the groove can limit the rotation angle of the rotating body 7 to 90 degrees. At the same time, the rivet 6 also prevents the rotating body 7 from escaping from the lock housing 4.

[0061] The rotation of the rotating body 7 is then converted into the linear motion of the pressing cap 20. There are two circumferentially evenly distributed contacts 15 on the inner wall of the rotating body 7. When the rotating body 7 rotates, the contacts 15 will interfere with the wavy protrusions 18 on the pressing cap 17. The contacts 15 will squeeze the wavy protrusions 18 of the pressing cap 17 and push the pressing cap 18 downward. Further, the pressing cap 18 presses the microswitch trigger head 2 of the microswitch 1 to put the switch in a conductive state. At the same time, due to the friction between the parts, it will remain in the current state to achieve self-locking of the switch. When the rotating body 7 rotates to an angle where the contacts 15 do not interfere with the wavy protrusions 18, the spring 29 has a reset function and will push the flange 19 of the pressing cap 17 upward so that the pressing cap 17 no longer presses the microswitch trigger point 2, and the switch is disconnected.

[0062] The rectangular inner wall 20 of the pressing cap 17 and the rectangular limiting column 22 of the fixing seat 21 are adapted to each other, and they can only move linearly relative to each other but cannot rotate. Since the fixing seat 21 is fixedly connected to the lock housing 4 by two rivets, it can be regarded as a fixing part. It limits the pressing cap 17 to only move linearly up and down and cannot rotate through the rectangular limiting column 22. The pressing cap 17 can only move up and down to achieve the pressing and releasing of the micro switch 1.

[0063] like Fig.17 As shown, when in use, the key mark 27 of the key 25 is used to align the rotating body mark 12 of the rotating body 7, so that the annular rib 26 can fall into the transmission groove 14 of the rotating body 7, and the key 25 and the rotating body 7 are connected. When the key mark 27 points to the zero mark 10 of the lock housing, the micro switch 1 is in the released state and the micro switch 1 is not conductive. When the key 25 is rotated 90 degrees clockwise, the key mark 27 is aligned with the 90 degree mark 11 of the lock housing, and at this time, the micro switch 1 is in the conductive state.

[0064] like Fig.18 As shown, the installation method of installing on the chassis shell 30, there is an adaptive lock hole on the chassis shell 30, installed on the chassis shell 30 from the front, the sealing gasket 31 is installed under the flange part of the lock shell 4, the lock shell thread 5 inside the chassis shell 30 is tightened with a nut, and the sealing gasket 31 is compressed to achieve a waterproof function.

[0065] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A self-locking mechanical switch, characterized in that: It includes a fixed seat coaxially sleeved on the outside of the micro switch, a trigger head at one end of the micro switch passes through the fixed seat and extends into the internal space of the top of the pressure cap; the pressure cap is coaxially sleeved on the outside of the fixed seat, the top of the pressure cap is provided with a protrusion, and the bottom of the pressure cap is connected to the fixed seat through a spring; a rotating body is coaxially sleeved on the outside of the top of the pressure cap, one end of the rotating body is provided with a transmission groove for docking with a key, and the inner side of the other end is provided with contacts arranged along the circumferential direction, when the rotating body rotates to a set angle, the contacts interfere with the protrusion, push the pressure cap to compress the spring and press the trigger head; the lock shell is coaxially sleeved on the outside of the rotating body, and a sealing ring is provided between the lock shell and the rotating body.

2. A self-locking mechanical switch according to claim 1, characterized in that: One end of the micro switch is a trigger head, the other end is an action head, and the middle part is connected to the fixing seat. When the trigger head is pressed axially, the electrode on the action head is turned on.

3. A self-locking mechanical switch according to claim 1, characterized in that: The fixing seat has a through hole, the inner surface of the through hole is connected to the micro switch, the trigger head of the micro switch passes through the top of the through hole, the top of the through hole is a non-circular hole, and at least two groups of blind holes are evenly arranged on the outer side of the circumference of the bottom end of the fixing seat. The fastener passes through the countersunk hole of the lock shell and falls into the blind hole to prevent the fixing seat from rotating and sliding in the lock shell.

4. A self-locking mechanical switch as claimed in claim 1, characterized in that: The lock housing is a cylindrical body, wherein at least two groups of lock housing marks are arranged on the end surface of one end, and a plane is arranged on the outer surface of the cylindrical body, and a countersunk hole is arranged in the plane for connecting and accommodating fasteners.

5. A self-locking mechanical switch according to claim 1, characterized in that: The rotating body is a cylindrical body with one end closed, one end is a closed end, and the other end is an open end. The outer end surface of the closed end is provided with a rotating body mark and a non-circular transmission groove, and the transmission groove is used to dock with the annular rib of the key.

6. A self-locking mechanical switch as claimed in claim 1, characterized in that: At least two groups of evenly distributed sealing ring grooves and limiting grooves are provided on the circumferential outer side of the rotating body. The sealing ring grooves are close to the closed end of the cylindrical body, and the limiting grooves are close to the open end of the cylindrical body. The sealing ring grooves are used to accommodate the sealing rings, and the limiting grooves are used to accommodate the fasteners.

7. A self-locking mechanical switch as claimed in claim 5, characterized in that: The inner side of the closed end of the rotating body is a cylindrical inner wall surface for accommodating the pressure cap. The cylindrical inner wall surface is provided with at least two contact points evenly distributed along the circumferential direction, and the contact points are arc-shaped protrusions.

8. A self-locking mechanical switch as claimed in claim 1, characterized in that: There are multiple groups of fasteners, at least one group of fasteners passes through the countersunk holes of the lock housing and falls into the limiting grooves of the rotating body, and at least one group of fasteners passes through the countersunk holes of the lock housing and falls into the blind holes of the fixing seat.

9. A self-locking mechanical switch as claimed in claim 1, characterized in that: The pressure cap is a rotating body structure with a flange on the outer surface, which is connected to the fixed seat through a spring; one end is closed, and the outer surface of the closed end has a protrusion, and the other end is open, and a non-circular inner wall surface is provided on the inner side of the opening for accommodating the trigger head of the micro switch.

10. A self-locking mechanical switch according to claim 1, characterized in that: The key comprises a handle connected to one side of a circular disk, an annular rib is arranged on the other side of the circular disk, and a key mark is arranged on the handle.

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