A foldable pawl locking mechanism

Abstract

This invention provides a foldable ratchet locking mechanism, including a pull rod, a locking body, and a base plate. The upper surface of the base plate is connected to a housing, and the lower surface is connected to a switch mounting body. An elastic ratchet is provided inside the housing, and the locking body is mounted inside the housing via the elastic ratchet. A push-button switch is provided inside the switch mounting body, and the push-button switch contacts the bottom of the locking body. The top of the locking body is movably connected to the pull rod via a pin. One end of the pull rod has an elastic ball head, and a hole III for placing an auxiliary pin is formed on the elastic ball head. The pull rod has a hole II, and the locking body has a hole I. The elastic ratchet of this invention can lock the locking body, causing the locking body to press the push-button switch, keeping the push-button switch in a pressed state. The entire ratchet locking mechanism is in a locked state, reducing the risk of accidental operation and triggering when using the push-button switch. It features simplicity, a locking function, and convenient operation.

Description

Technical Field

[0001] This invention relates to a foldable ratchet locking mechanism, belonging to the technical field of push-button switch driving methods. Background Technology

[0002] A push-button switch is a switch whose internal contacts are switched by a pushing force that travels in the same straight line as the button's travel. In many situations, a locking function is required. However, in some special applications, ordinary locking mechanisms cannot meet the requirements of limited space and preventing accidental triggering. For example, Chinese Patent No. CN212084880U discloses a double-pole locking push-button switch. In this switch, the outer side of the cam sleeve is fixedly connected to the inner wall of the middle part of the housing; the upper end of the pressure rod can slide through the back of the housing and fit with the push handle cap; the lower end of the pressure rod can slide through the housing and the back of the cam sleeve and corresponds to the locking element; the pressure rod has a guide groove corresponding to the inclined guide rail of the cam sleeve; the lower end of the locking element is rotatably sleeved with the upper end of the push handle; a moving contact is fixed at the lower end of the push handle; the two ends of the compression spring are fixedly connected to the push handle and the bottom of the housing, respectively; two short conductive parts are fixedly installed through the lower part of the housing at intervals and correspond to the moving contact. When the push button cap is pressed down, the spring axle is compressed, the pressure rod slides down, and the locking element rotates after engaging with the pressure rod. This causes the locking element to become misaligned and is restricted from rising by the cam sleeve inclined guide rail. The restoring force of the spring axle is restricted by the locking element, preventing the push button cap from being bounced up by the spring axle. This solves the locking function problem. However, due to the small installation space and the elasticity of the sealing ring, the push button cap is bounced up by the sealing ring, making it difficult to distinguish the state when using the push button switch, which can easily lead to misoperation and the risk of accidental triggering. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a foldable pawl locking mechanism. The foldable pawl locking mechanism has a simple design and solves the drawbacks of traditional locking button switches.

[0004] The present invention is achieved through the following technical solutions.

[0005] This invention provides a foldable pawl locking mechanism, comprising a pull rod, a locking body, and a base plate; the upper end face of the base plate is connected to a housing, and the lower end face is connected to a switch mounting body; an elastic pawl is provided inside the housing, and the locking body is mounted inside the housing via the elastic pawl; a push-button switch is provided inside the switch mounting body, and the push-button switch is in contact with the bottom of the locking body; the top of the locking body is movably connected to the pull rod via a pin, and one end of the pull rod is provided with an elastic ball head, on which a hole III for placing an auxiliary pin is opened; the pull rod is provided with a hole II, and the locking body is provided with a hole I.

[0006] The pull rod, locking body, shaft pin, and auxiliary pin form a folding mechanism; the locking body, elastic pawl, fastening screw, switch mounting body, and base plate form a pawl locking mechanism; and the locking body, push button switch, and switch mounting body form a limiting mechanism.

[0007] The upper surface of the outer shell is provided with a concave shape.

[0008] Holes I, II, and III are all the same size and are matched to the diameter of the auxiliary pin.

[0009] Threadlocker was applied to the joints between the housing and the switch mount and the base plate.

[0010] The elastic pawl is connected to the base plate by fastening screws.

[0011] The upper surface of the switch mounting body is provided with a limiting surface.

[0012] The elastic pawl is composed of multiple pawls forming a pawl body. The bottom of the pawl body is an annular plane with multiple fixing holes on the annular plane.

[0013] The locking body includes a locking platform, with a pin hole at the upper end and a limiting platform at the lower end; the limiting platform is connected to the limiting surface of the switch mounting body, and the locking platform is engaged with an elastic pawl.

[0014] The upper surface of the locking platform is a plane, the lower surface is a concave plane, the middle section is a cone, and the bottom of the cone is rounded.

[0015] The beneficial effects of this invention are as follows: the elastic pawl can lock the locking body, so that the locking body presses the button switch, keeping the button switch in the pressed state, and the entire pawl locking mechanism is in the locked state. When using the button switch, it is not easy to cause accidental operation and triggering. It has the characteristics of being simple, having a locking function, being easy to operate, and saving installation space. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the pull rod of the present invention standing upright;

[0018] Figure 3 This is a diagram showing the connection between the pull rod and the pin.

[0019] Figure 4 This is a partial structural schematic diagram of the present invention;

[0020] Figure 5 This is a schematic diagram of the limiting mechanism of the present invention;

[0021] Figure 6 This is a schematic diagram of the locking body of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the elastic ratchet of the present invention;

[0023] Figure 8 This is a bottom view of the inventive pawl;

[0024] Figure 9 This is a schematic diagram of the structure of the switch mounting body of the present invention;

[0025] In the diagram: 1-Pull rod, 2-Housing shell, 3-Locking body, 31-Locking platform, 32-Limiting platform, 33-Pin hole, 4-Elastic pawl, 5-Button switch, 6-Fasting screw, 7-Switch mounting body, 8-Shaft pin, 9-Auxiliary pin, 10-Base plate. Detailed Implementation

[0026] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0027] Example 1

[0028] like Figures 1-9 The foldable pawl locking mechanism shown includes a pull rod 1, a locking body 3, and a base plate 10. The upper end of the base plate 10 is connected to a housing 2, and the lower end is connected to a switch mounting body 7. An elastic pawl 4 is provided inside the housing 2, and the locking body 3 is mounted inside the housing 2 via the elastic pawl 4. A push-button switch 5 is provided inside the switch mounting body 7, and the push-button switch 5 contacts the bottom of the locking body 3. The top of the locking body 3 is movably connected to the pull rod 1 via a pivot pin 8. One end of the pull rod 1 is provided with an elastic ball head, and a hole III for placing an auxiliary pin 9 is opened on the elastic ball head. The pull rod 1 has a hole II, and the locking body 3 has a hole I.

[0029] The pull rod 1, locking body 3, shaft pin 8, and auxiliary pin 9 form a folding mechanism; the locking body 3, elastic pawl 4, fastening screw 6, switch mounting body 7, and base plate 10 form a pawl locking mechanism; and the locking body 3, push button switch 5, and switch mounting body 7 form a limiting mechanism.

[0030] The upper surface of the outer shell 2 is provided with a concave shape.

[0031] Holes I, II, and III are all the same size and all match the diameter of the auxiliary pin 9, making the auxiliary pin 9 interchangeable.

[0032] Threadlocker is applied to the connection points A and B between the outer casing 2 and the switch mounting body 7 and the base plate 10.

[0033] The elastic pawl 4 is connected to the base plate 10 by a fastening screw 6.

[0034] The upper surface of the switch mounting body 7 is provided with a limiting surface.

[0035] The elastic pawl 4 consists of a pawl body composed of multiple pawls. The bottom of the pawl body is an annular plane, on which multiple fixing holes are provided.

[0036] The locking body 3 includes a locking platform 31, with a pin hole 33 at the upper end and a limiting platform 32 at the lower end; the limiting platform 32 is connected to the limiting surface of the switch mounting body 7, and the locking platform 31 is engaged with the elastic pawl 4.

[0037] The upper surface of the locking platform 31 is a plane, the lower surface is a concave plane, the middle section is a cone, and the bottom of the cone is rounded.

[0038] The working principle of this invention is as follows:

[0039] Insert the auxiliary pin 9 through the hole III of the elastic ball head of the pull rod 1, pull the pull rod 1 out of the concave body of the outer casing 2 and stand it upright. Then, lift the pull rod 1 and rotate it upwards along the shaft pin 8. When the hole II in the pull rod 1 is concentric with the hole I in the locking body 3, remove the auxiliary pin 9 from hole III and insert it into holes I and II to prevent the pull rod 1 from swinging left and right relative to the locking body 3. Figure 2 Pull the lever 1 and locking body 3 upwards with force. At this time, the button switch 5 is in the non-pressed state. During the pulling process, the elastic pawl 4 elastically opens outwards. After pulling out, the elastic pawl 4 returns to its original state.

[0040] Furthermore, when locking, push and pull the lever 1 downwards to move the locking body 3 downwards and insert it into the locking mechanism. When the limiting platform of the locking body 3 is in contact with the limiting surface of the switch mounting body 7, the elastic pawl 4 locks the locking platform of the locking body 3 and enters the locking state. At this time, the button switch 5 is in the pressed state. Then, take out the auxiliary pin 9 from the holes I and II, rotate the lever 1 downwards, and insert the elastic ball head of the lever 1 into the concave body of the outer shell 2. At this time, the button switch 5 is in the pressed and locked position, and the circuit returns to the initial state.

[0041] Example 2

[0042] The installation process of this invention is as follows:

[0043] Install the push-button switch 5 into the switch mounting body 7 to form component (A); fix the elastic pawl 4 to the base plate 10 with four fastening screws 6 to form component (B); screw component (A) into component (B) to form component (C), and apply thread-locking adhesive at point B; screw the housing 2 into component (C) to form component (D), and apply thread-locking adhesive at point A; connect the pull rod 1 and the locking body 3 together with the shaft pin 8 to form component (E); rotate the pull rod 1 so that hole I and hole II in component (E) are concentric, and insert the auxiliary pin 9 to form component (F); insert component (F) into component (D) so that the limiting platform in the locking body 3 is flush with the limiting surface of the switch mounting body 7, then remove the auxiliary pin 9, rotate the pull rod 1 downward, and embed the elastic ball head in the pull rod 1 into the concave body of the housing 2.

[0044] Example 3

[0045] The elastic ball head of the pull rod 1 has a round hole Ⅲ for inserting the auxiliary pin 9 to help the pull rod 1 stand upright.

[0046] Preferably, the elastic ball head is made of hard rubber material.

[0047] Specifically, when the pull rod 1 is not in operation, it is inserted into the concave body of the outer casing 2.

[0048] Example 4

[0049] Hole III is located on the upper side of the elastic ball head, rather than in the center of the non-elastic ball head, to facilitate the insertion of auxiliary pin 9.

[0050] Example 5

[0051] The lower end face of the elastic pawl 4 is an annular plane with four fixing holes evenly distributed on it, which facilitates the fastening of the screw 6 to fix the elastic pawl 4; the upper end has six pawl bodies evenly distributed, which can both lock the locking body 3 and be elastic.

[0052] Specifically, the lower half of the locking platform 31 on the locking body 3 is designed as a cone shape, which facilitates the natural opening of the six pawls of the elastic pawl 4 when it is inserted into the locking mechanism. The upper surface of the locking platform 31 in the locking body 3 is a plane with a rounded corner of R0.3 on the outer circle, so that the locking body 3 will not slide out on its own when the mechanism is locked, and at the same time, when the locking body 3 is pulled out, it will not scratch the elastic pawl 4.

[0053] Furthermore, the lower part of the locking body 3 has a travel limit platform 32 to prevent damage to the push button switch 5.

[0054] The working principle of the pawl locking mechanism is as follows: when not in operation, the six pawl bodies on the elastic pawl 4 lock the locking platform 31 of the locking body 3, the concave end face on the locking body 3 presses the button switch 5, the button switch 5 is in the pressed state, and the entire pawl locking mechanism is in the locked state.

Claims

1. A foldable pawl locking mechanism, comprising a pull rod (1), a locking body (3), a bottom plate (10), characterized in that: The upper end surface of the bottom plate (10) is connected with a shell (2), and the lower end surface is connected with a switch mounting body (7); the shell (2) is provided with an elastic pawl (4) inside, and the locking body (3) is installed in the shell (2) through the elastic pawl (4); the switch mounting body (7) is provided with a push button switch (5) inside, and the push button switch (5) is in contact with the bottom of the locking body (3); the top of the locking body (3) is movably connected with a pull rod (1) through a shaft pin (8), one end of the pull rod (1) is provided with an elastic ball head, and a hole III for placing an auxiliary pin (9) is formed in the elastic ball head; the pull rod (1) is provided with a hole II, and the locking body (3) is provided with a hole I. The auxiliary pin is inserted into the hole III of the elastic ball head of the pull rod, the pull rod is pulled out of the concave body of the shell and stands up, and the pull rod is lifted and rotated upward along the shaft pin; when the hole II in the pull rod and the hole I in the locking body are concentric, the auxiliary pin is taken out of the hole III and inserted into the hole I and the hole II, so as to prevent the pull rod from swinging left and right relative to the locking body; when locking, the pull rod is pushed downward, the locking body is driven to move downward and is inserted into the locking mechanism, when the limiting table of the locking body is attached to the limiting surface of the switch mounting body, the elastic pawl clamps the locking table of the locking body, and enters the locking state, at this time, the push button switch is in the pressed state, then the auxiliary pin is taken out of the hole I and the hole II, the pull rod is rotated downward, and the elastic ball head of the pull rod is clamped into the concave body of the shell, at this time, the push button switch is in the pressed locking position, and the circuit returns to the initial state.

2. The foldable pawl locking mechanism of claim 1, wherein: The pull rod (1), the locking body (3), the shaft pin (8) and the auxiliary pin (9) form a folding mechanism, the locking body (3), the elastic pawl (4), the fastening screw (6), the switch mounting body (7) and the bottom plate (10) form a pawl locking mechanism, and the locking body (3), the push button switch (5) and the switch mounting body (7) form a limiting mechanism.

3. The foldable pawl locking mechanism of claim 1, wherein: The upper end surface of the shell (2) is provided with a concave body.

4. The foldable pawl locking mechanism of claim 1, wherein: The sizes of the hole I, the hole II and the hole III are the same, and are matched with the diameter of the auxiliary pin (9).

5. The foldable pawl locking mechanism of claim 1, wherein: The connection parts of the shell (2) and the switch mounting body (7) and the bottom plate (10) are coated with thread glue.

6. The foldable pawl locking mechanism of claim 1, wherein: The elastic pawl (4) is connected with the bottom plate (10) through the fastening screw (6).

7. The foldable pawl locking mechanism of claim 1, wherein: The upper end surface of the switch mounting body (7) is provided with a limiting surface.

8. The foldable pawl locking mechanism of claim 1, wherein: The elastic pawl (4) is composed of a plurality of pawl bodies, and the bottom of the pawl body is an annular plane, and a plurality of fixing holes are arranged on the annular plane.

9. The foldable pawl locking mechanism of claim 1, wherein: The locking body (3) comprises a locking table (31), a pin shaft hole (33) is arranged at the upper end of the locking table (31), and a limiting table (32) is arranged at the lower end; the limiting table (32) is connected with the limiting surface of the switch mounting body (7), and the locking table (31) is clamped with the elastic pawl (4).

10. The foldable pawl locking mechanism of claim 9, wherein: The upper end surface of the locking table (31) is a plane, the lower end surface is a concave plane, the middle section is a conical body, and a round corner is arranged at the bottom of the conical body.

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