A quick-release spring pin

Abstract

The present application discloses the technical field of latches, specifically a quick-release spring pin comprising a pin body, the pin body comprising a pin head end and a pin tail end, the pin head end being provided with a through hole perpendicular to the pin body's axial direction, the through hole being fitted with a pull ring, the pin tail end being provided with a cavity reserved therein, and the pin tail end also being provided with a relief hole, the relief hole being connected to the cavity, the cavity being provided with an elastic spring sheet located at the top of the cavity, one end of the spring sheet being fixed to a side of the cavity away from the relief hole, the other end of the spring sheet being provided with a hemispherical projection, the projection passing through the relief hole and located outside the cavity. This solution is designed for use with a remote igniter to improve the convenience of inserting or removing the latch.

Description

Technical Field

[0001] The present invention relates to the technical field of latches, and in particular to a quick-release spring pin. Background Art

[0002] A remote igniter is an ignition device that provides ignition gas for a rocket. When the remote igniter is being loaded, unloaded, installed or maintained, in order to ensure that the remote igniter does not start accidentally, a pin needs to be inserted into the pin hole of the remote igniter so that the firing pin rod of the remote igniter cannot move along the axis of the remote igniter, thereby ensuring that the remote igniter does not start accidentally during installation and maintenance, thereby playing a role of insurance. However, if the pin is too simple, such as just a straight rod, which is convenient to insert into the remote igniter, it is also easy to fall off, so it is not safe. If a fixing buckle is added to the pin, the operation steps for installing or removing the pin will be cumbersome, which will consume a lot of time and is not conducive to improving work efficiency. Therefore, there is an urgent need for a pin that is easy to install and disassemble for use with a remote igniter. Summary of the Invention

[0003] The present invention aims to provide a quick-release spring pin for use with a remote igniter, thereby improving the convenience of inserting or removing the pin.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a quick-release spring pin, comprising a pin body, the pin body comprising a pin head end and a pin tail end, the pin head end being provided with a through hole perpendicular to the axial direction of the pin body, a pull ring being sleeved in the through hole, a cavity being reserved inside the pin tail end, and the pin tail end being further provided with an avoidance hole, the avoidance hole being connected to the cavity, an elastic spring sheet being provided in the cavity, the spring sheet being located at the top of the cavity, one end of the spring sheet being fixed on a side of the cavity away from the avoidance hole, the other end of the spring sheet being provided with a hemispherical protrusion, the protrusion passing through the avoidance hole and being located outside the cavity.

[0005] The present invention works as follows: During use, the pin's tail end is aligned with the pin hole of the remote igniter, and the pin is then inserted into the hole. As the pin is inserted, the hemispherical projection contacts the hole wall and, under the continuous force of insertion, is squeezed by the hole wall. Because the spring clip is elastic and one end of the clip is fixed in the cavity, the projection is squeezed by the hole wall and forced through the escape hole into the cavity. Once the projection on the pin passes through the hole and is outside the hole, the hole wall no longer squeezes the projection, and the spring force of the spring clip forces the projection through the escape hole and out of the cavity. At this point, the pin is inside the hole, with the projection and pull ring located outside the hole. To remove the pin, simply pull the pull ring, which again presses the projection into the cavity through the hole wall. The pin can be removed by continuously pulling the pull ring.

[0006] The beneficial effects of the present invention are as follows: This solution provides a cavity at the pin tail end of the pin body, fixes a spring sheet in the cavity, and the other end of the spring sheet is provided with a hemispherical shape. Therefore, when the pin body is inserted into the pin hole, the hemispherical protrusion is squeezed and then pressed into the cavity. After the protrusion passes through the pin hole, it pops out of the cavity under the action of the elastic force of the spring sheet, and cooperates with the pull ring to form a barrier at both ends of the pin body, effectively solving the problem that the inserted pin body is easy to fall off or difficult to remove.

[0007] Furthermore, the pin tail end is provided with an opening that communicates with the cavity. The end of the spring piece away from the protrusion is bent into a U-shaped end, and the spring piece is clamped in the cavity via the U-shaped end. This arrangement facilitates direct insertion of the U-shaped end of the spring piece through the opening into the cavity during installation. Since the spring piece is elastic, the elastic force of the U-shaped end when it is expanded forms a continuous abutment against the cavity wall, thereby securing the spring piece in the cavity.

[0008] Furthermore, the pin tail end is inclined toward the central axis of the pin body to form a conical shape. The purpose is that, through this arrangement, the diameter of the pin tail end is smaller than the diameter of the pin body, making it easier for the pin body to be inserted into the pin hole.

[0009] Furthermore, the pin tail end is fixedly connected with a plugging cap for closing the opening. The purpose is that the pin tail end is provided with an opening, so there is an uncertain hidden danger of the spring piece coming out, so the plugging cap is provided to prevent the spring piece from coming out.

[0010] Furthermore, a long strip of spring is disposed within the cavity, with one end of the spring located within the groove of the U-shaped end of the spring and the other end abutting against the plug. This arrangement serves the purpose of, firstly, preventing the spring from circumferentially moving along the pin body, and secondly, providing support when the protrusion is pressed downward into the cavity, thereby increasing the spring's stability and durability.

[0011] Furthermore, the pin body, the spring piece and the plugging cap are all made of stainless steel, so as to increase the milk corrosion resistance of the device.

[0012] Furthermore, the spring is made of 1Cr17Ni2 material with a thickness of 0.4 mm. The purpose is that the spring of this material and the small size have better strength and elastic limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of an embodiment of a quick-release spring pin of the present invention. DETAILED DESCRIPTION

[0014] The following is further described in detail through specific implementation methods:

[0015] The reference numerals in the drawings of the specification include: pull ring 1, through hole 2, pin body 3, spring piece 4, protrusion 5, avoidance hole 6, blocking cap 7, spring 8, cavity 9.

[0016] Example 1 is basically as shown in the attached Figure 1 As shown:

[0017] The cam 1 is provided with a through hole 2 perpendicular to the axial direction of the pin body 3, and a pull ring 1 is sleeved in the through hole 2. A cavity 9 is reserved inside the pin tail end, and the cavity 9 is communicated with the opening, and an avoidance hole 6 is also provided on the pin wall of the pin tail end, and the avoidance hole 6 is communicated with the cavity 9. An elastic long strip of spring piece 4 is provided in the cavity 9, and the spring piece 4 is located at the top of the cavity 9. The end of the spring piece 4 away from the protrusion 5 is a "U"-shaped end bent into a "U" shape, and the spring piece 4 is stuck in the cavity 9 through the "U"-shaped end. The other end of the spring piece 4 is provided with a hemispherical protrusion 5, which passes through the avoidance hole 6 and is located outside the cavity 9. The pin tail end is inclined toward the central axis of the pin body 3 to form a cone shape. The pin tail end is fixedly connected with a plugging cap 7 for closing the opening. The pin body 3, spring piece 4 and plugging cap 7 are all made of stainless steel.

[0018] The specific implementation process is as follows:

[0019] During use, the pin tail end of the pin body 3 is aligned with the pin hole of the remote igniter, and then the pin body 3 is inserted into the pin hole. When the pin body 3 is inserted into the pin hole, the hemispherical protrusion 5 contacts the wall of the pin hole and is subjected to the continuous pushing force during insertion. The protrusion 5 is squeezed by the wall of the pin hole. Since the spring clip 4 is elastic and one end of the spring clip 4 is fixed in the cavity 9, when the protrusion 5 is squeezed by the wall of the pin hole, the protrusion 5 passes through the avoidance hole 6 and is pressed into the cavity 9. When the protrusion 5 on the pin body 3 passes through the pin hole and is located outside the pin hole, the wall of the pin hole no longer squeezes the protrusion 5. Under the elastic force of the spring clip 4, the protrusion 5 passes through the avoidance hole 6 and pops out of the cavity 9. At this time, the pin body 3 is located inside the pin hole, and the protrusion 5 and the pull ring 1 are respectively located outside the two ends of the pin hole. When the pin body 3 needs to be removed, the pull ring 1 is directly pulled to press the protrusion 5 into the cavity 9 through the hole wall of the pin hole again. The pin body 3 can be taken out by continuously pulling the pull ring 1.

[0020] Example 2

[0021] The difference between Example 2 and Example 1 is that a long strip of spring 8 (made of 1Cr17Ni2 material and 0.4mm thick) is disposed within cavity 9. One end of spring 8 is located within the groove of the "U"-shaped end of spring leaf 4, and the other end abuts against plugging cap 7. This arrangement not only prevents spring leaf 4 from circumferentially moving along pin body 3, but also provides support when protrusion 5 is pressed downward into cavity 9, thereby increasing the stability and durability of spring leaf 4.

Claims

1. A quick-release spring pin, comprising a pin body, the pin body comprising a pin head end and a pin tail end, the pin head end being provided with a through hole perpendicular to the axial direction of the pin body, the through hole being provided with a pull ring, characterized in that: A cavity is reserved inside the tail end of the pin, and an avoidance hole is also provided at the tail end of the pin. The avoidance hole is communicated with the cavity. An elastic spring is provided in the cavity and is located at the top of the cavity. One end of the spring is fixed to a side of the cavity away from the avoidance hole, and the other end of the spring is provided with a hemispherical protrusion, which passes through the avoidance hole and is located outside the cavity. The tail end of the pin is open and communicates with the cavity. The end of the spring away from the protrusion is a U-shaped end bent into a U shape, and the spring is stuck in the cavity through the U-shaped end. The tail end of the pin is fixedly connected to a plug cap for closing the opening; A long strip of spring is provided in the cavity, one end of the spring is located in the groove of the "U"-shaped end of the spring, and the other end is abutted against the blocking cap.

2. The quick-release spring pin according to claim 1, characterized in that: The pin tail end is inclined toward the central axis of the pin body to form a cone shape.

3. The quick-release spring pin according to claim 2, characterized in that: The pin body, spring piece and plugging cap are all made of stainless steel.

4. The quick-release spring pin according to claim 3, characterized in that: The reed is made of 1Cr17Ni2 material and has a thickness of 0.4 mm.

Images