A portable gas measuring gun

Abstract

A portable gas measuring gun comprises a gun body, a muzzle with an internal thread interface, a cavity transversely arranged in the gun body and passing through the muzzle, a measuring column and a pull rod capable of moving forward and backward arranged in the cavity, the measuring column being arranged in front of the pull rod, the pull rod being provided with an elastic lock catch capable of detachable connection with the measuring column, when a connector to be measured is inserted into the muzzle, the measuring column and the connector to be measured form a sealed cavity, a spanner lock catch capable of locking the measuring column is arranged at a middle rear position of a lower end of the cavity, when the pull rod moves forward to a position, the measuring column is connected with the pull rod, during measurement, the pull rod moves backward to drive the measuring column to move to the position of the spanner lock catch, the measuring column is positioned and locked, the pull rod continues to move backward after advancing, and is separated from the measuring column, the spanner is cocked, the spanner lock catch is separated from the measuring column, the measuring column moves forward, and a scale capable of measuring the moving distance of the measuring column is arranged on the gun body; the present application has simple and compact structure, is convenient to carry, does not need to be connected with electricity, can realize gas measurement by connecting with gas, and is convenient and reliable in testing.

Description

Technical Field

[0001] This invention belongs to the field of airtightness testing technology and relates to a portable air gun for connector sealing testing. Background Technology

[0002] Connectors are indispensable components in electronic devices, used to connect two active devices to transmit current or signals. Depending on the operating environment, some connectors require excellent airtightness; therefore, airtightness testing of connectors is of great importance.

[0003] Currently available air tightness testing tools are relatively large, difficult to carry, and occupy a large working area. They also require external factors such as electricity and gas to perform the air tightness testing function, making it impossible to inspect the product at any time.

[0004] An investigation revealed that existing patent number CN201821966649.9, entitled "A Connector Airtightness Detection Structure," includes an airtightness detection structure body. The airtightness detection structure body is equipped with a switch button and an aluminum cavity. A probe and an airtightness extraction hole are disposed on the airtightness detection structure body and inside the aluminum cavity. A switch pin is also disposed on the airtightness detection structure body. A cylinder interface is also provided on the airtightness detection structure body, and a cylinder is connected to the cylinder interface. This structure can accurately detect the airtightness of connectors, but it requires components such as a cylinder, making it not only structurally complex and bulky, but also inconvenient to carry and use. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a portable gas gun that is simple and compact in structure, easy to operate and carry, and requires no electricity.

[0006] The technical solution adopted by this invention to solve the above-mentioned technical problems is as follows: a portable air gun, comprising a gun body, characterized in that: the front end of the gun body is an internally threaded interface for connecting to the connector to be tested; a cavity is laterally provided inside the gun body, communicating with the internally threaded interface; a measuring column and a pull rod that can move back and forth are provided inside the cavity; the pull rod is positioned at the rear section of the cavity with limited back and forth movement; the measuring column is located at the front side of the pull rod; the front end of the pull rod is provided with an elastic lock that can be detachably connected to the rear end of the measuring column; when the connector to be tested is inserted into the gun muzzle and positioned, a sealed cavity is formed between the front end of the measuring column and the connector to be tested; inside the gun body, The lower rear part of the cavity is equipped with a wrench latch that can lock or unlock the measuring column. One end of the wrench latch is kept locked by the wrench spring, and the other end of the wrench latch abuts against the wrench. When the pull rod moves forward to the position, the measuring column is connected to the pull rod. During measurement, when the pull rod moves backward, it moves the measuring column backward to the wrench latch position, where the measuring column is locked. When the pull rod moves forward and then continues to move backward, the measuring column disengages from the pull rod. Pulling the wrench releases the wrench latch from the measuring column, allowing the measuring column to move forward. The gun body is equipped with a scale for measuring the movement distance of the measuring column.

[0007] Furthermore, the gun body is formed by the joining of a left shell and a right shell. The cavity is divided into front and rear sections. The front end of the front section has a tapered opening with a gradually narrowing diameter that is connected to an internal thread interface. The front end of the pull rod is cylindrical, corresponding to the cavity. Guide posts are protruding on the left and right sides of the front end of the pull rod, and guide strips are provided on the left and right sides of the rear end. Guide grooves are provided on the left and right sides of the gun body, corresponding to the position of the rear section of the cavity, for the guide posts and guide strips to be inserted and slide back and forth. The scale is set on the front side below the guide groove.

[0008] Furthermore, the measuring column is cylindrical, with an annular groove formed on the outer circumference of the front end. A sealing ring is embedded in the annular groove and seals against the inner wall of the cavity. The rear end of the measuring column has a connector that engages with the elastic buckle for locking and unlocking. The front end of the pull rod has a cavity for inserting the connector. There are two elastic buckles arranged opposite each other on the left and right. The guide posts on the left and right sides of the front end of the pull rod have through holes in the middle that communicate with the cavity. The elastic buckles are installed in the through holes and engage with the connector for locking.

[0009] Furthermore, the connector includes a fixed head and a movable head. The fixed head is hemispherically connected to the rear end of the measuring column, and the movable head is sleeved on the front side of the fixed head. A small spring supports the movable head and the fixed head, and an annular groove is formed between the movable head and the fixed head for the elastic latch to engage. The elastic latch is composed of a latch body and a latch spring. The inner end of the latch body is a latch head that mates with the connector. The latch head passes through the through hole of the guide column and is inserted into the cavity. The insertion surface of the latch head corresponding to the connector is an inclined surface that facilitates engagement. The outer end of the latch body is provided with a stop block that abuts against the outer wall of the guide column. The latch spring is sleeved on the latch body. One end of the latch spring abuts against the latch head, and the other end abuts against the inner wall of the through hole for support, so that the latch body has a tendency to always lock inward with the connector.

[0010] Furthermore, the rear section of the cavity, corresponding to the lower part of the measuring column when the pull rod is moved to the rear position, has a notch for inserting the upper end of the wrench lock. The wrench lock is rotatably mounted in the gun body via a pivot pin, located below the notch. The lower end face of the measuring column has a slot for the wrench lock to engage. A wrench spring supports the lower end of the wrench lock and the inner wall of the gun body, so that the wrench lock tends to always lock with the measuring column.

[0011] Furthermore, the wrench is rotatably mounted on the gun body, and the upper end of the wrench is provided with a locking block that abuts against the other end of the wrench latch. When the wrench is pulled, the locking block causes the wrench latch to rotate and disengage from the latch of the measuring column, allowing the measuring column to move forward.

[0012] Furthermore, a sealing strip is embedded between the left and right housings at the position corresponding to the front section of the cavity and the internal thread interface. The sealing strip is composed of an upper sealing strip, a lower sealing strip, and a front sealing ring. The mating surfaces of the left and right housings are respectively provided with grooves for the upper and lower sealing strips to be embedded on the upper and lower sides corresponding to the front section of the cavity and the internal thread interface. The inner wall of the left and right housings corresponding to the internal thread section of the internal thread interface is recessed with an annular groove for the front sealing ring to be embedded.

[0013] Preferably, the upper sealing strip, the lower sealing strip, and the front sealing ring are integrated into one piece, and the rear ends of the upper and lower sealing strips are provided with connecting holes. After the sealing strip is positioned, it is fixed to the gun body by screws.

[0014] Furthermore, the upper end face of the gun body is recessed with a groove for mounting the pull rod sleeve and sliding it back and forth. The length of the groove is the same as that of the guide groove. The pull rod sleeve can be slidably fitted onto the groove. The lower end of the pull rod sleeve is provided with a strip hole that connects to the guide strip at the rear end of the pull rod.

[0015] Finally, the color of the sealing ring is different from the color of the measuring column. When the pull rod moves back to its position, the position of the sealing ring corresponds to the zero point of the scale.

[0016] Compared with existing technologies, the advantages of this invention are as follows: The structure is designed in the shape of a gun, with a cavity penetrating the muzzle inside. A measuring column and a pull rod are installed within the gun body. A sealed cavity is formed between the measuring column and the connector. The pull rod moves the measuring column backward, creating a negative pressure in the sealed cavity. Pulling a wrench moves the measuring column forward. The airtightness of the connector is determined by the distance the measuring column moves. This invention has a simple and compact structure, is easy to carry, and requires no electricity; it only requires air connection to perform air measurement. Furthermore, the testing is convenient and reliable. Attached Figure Description

[0017] Figure 1 This is a front view of an embodiment of the present invention;

[0018] Figure 2 This is a perspective view (in perspective) of an embodiment of the present invention.

[0019] Figure 3 This is an exploded view of an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the testing process according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram illustrating the working principle of an embodiment of the present invention;

[0022] Figure 6 This corresponds to the embodiments of the present invention. Figure 5 A sectional view (viewed from top). Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1-6As shown, a portable air gun includes a gun body 1. The muzzle of the gun body 1 is an internally threaded interface 10 that connects to the connector A to be tested. A cavity C, coaxially communicating with the internally threaded interface 10, is provided transversely inside the gun body 1. A measuring column 2 and a pull rod 3, which can move back and forth, are provided within the cavity C. The pull rod 3 is positioned at the rear of the cavity C with limited forward and backward movement. The measuring column 2 is positioned in front of the pull rod 3. An elastic latch 5 at the front end of the pull rod 3 is detachably connected to the rear end of the measuring column 2. When the connector A to be tested is inserted into the muzzle and positioned, a sealed cavity B is formed between the front end of the measuring column 2 and the connector A. A lever for locking or unlocking the measuring column 2 is located at the lower rear part of the cavity C within the gun body 1. The hand lock 4 has one end that keeps the measuring column 2 locked by the wrench spring 40. The other end of the wrench lock 4 is engaged with the wrench 8 for easy unlocking. When the pull rod 3 moves forward to its position, the measuring column 2 and the pull rod 3 are connected by the elastic lock 5. During measurement, when the pull rod 3 moves backward, it moves the measuring column 2 backward to the position of the wrench lock 4. The measuring column 2 is locked and positioned by the wrench lock 4. After the pull rod 3 moves forward, it continues to move backward. The measuring column 2 and the pull rod 3 will disengage through the elastic lock 5. Pulling the wrench 8 will disengage the wrench lock 4 from the measuring column 2, allowing the measuring column 2 to move forward. The gun body 1 is equipped with a scale 1c that can measure the moving distance of the measuring column 2.

[0025] The specific structure is as follows: the gun body 1 is formed by the left shell 11 and the right shell 12. The cavity C is divided into front and rear sections. The front end of the front section is a tapered opening with a gradually narrowing diameter and is connected to the internal thread interface 10. The front end of the pull rod 3 is a cylinder corresponding to the cavity C. The left and right sides of the front end of the pull rod 3 are respectively provided with guide posts 31, and the left and right sides of the rear end are respectively provided with guide strips 32. The left and right sides of the gun body 1 are provided with guide grooves 1a for the guide posts 31 and guide strips 32 to be inserted and slide back and forth at the position of the rear section of the cavity. The scale 1c is set below the front side of the guide groove 1a. The measuring column 2 is cylindrical. The outer circumference of the front end of the measuring column 2 is formed with an annular groove 21. A sealing ring 20 is embedded in the annular groove 21 and seals against the inner wall of the cavity C. The rear end of the measuring column 2 is provided with a connector 22 that cooperates with the elastic buckle 5 to lock or unlock. The front end of the pull rod 3 is provided with a cavity 33 for the connector 22 to be inserted. There are two elastic buckles 5 arranged symmetrically on the left and right. The guide posts 31 on the left and right sides of the front end of the pull rod 3 are provided with through holes 34 that communicate with the cavity 33. The elastic buckles 5 are installed in the through holes 34 and cooperate with the connector 22 to lock.

[0026] Connector 22 includes a fixed head 221 and a movable head 222. The fixed head 221 is hemispherically connected to the rear end of the measuring column 2. The movable head 222 is fitted onto the front side of the fixed head 221. A small spring 223 supports the movable head 222 and the fixed head 221. An annular groove 224 is formed between the movable head 222 and the fixed head 221 for the elastic locking buckle 5 to engage. The elastic locking buckle 5 is composed of a locking body 51 and a locking spring 52. The inner end of the locking body 51 is fitted with the connector 22. The locking head is inserted into the cavity 33 through the through hole 34 of the guide post 31. The insertion surface of the locking head corresponding to the connector 22 is an inclined surface for easy locking. The outer end of the locking body 51 is provided with a stop block that abuts against the outer wall of the guide post 31. The locking spring 52 is sleeved on the locking body 51. One end of the locking spring 52 abuts against the locking head, and the other end abuts against the inner wall of the through hole 34 for support, so that the locking body 51 always has a tendency to lock inward with the annular groove 224 on the connector 22.

[0027] The rear section of cavity C, corresponding to the position of pull rod 3 when it moves backward, has a notch below the measuring column 2 for the upper end of the wrench latch 4 to be inserted. The wrench latch 4 is rotatably mounted inside the gun body 1 via a pivot pin, located below the notch. The lower end face of the measuring column 2 has a locking slot 23 for one end of the wrench latch 4 to be engaged. A wrench spring 40 supports the lower end of the wrench latch 4 between it and the inner wall of the gun body 1, giving one end of the wrench latch 4 a tendency to always lock with the measuring column 2. The wrench 8 is rotatably mounted on the gun body 1. The upper end of the wrench 8 has a locking block that abuts against the other end of the wrench latch 4. When the wrench 8 is pulled, the locking block causes the wrench latch 4 to rotate, disengaging one end of the wrench latch 4 from the locking slot 23 of the measuring column 2, allowing the measuring column 2 to move forward.

[0028] A sealing strip 6 is embedded between the left housing 11 and the right housing 12, corresponding to the position between the front section of the cavity and the internal thread interface 10. The sealing strip 6 is composed of an upper sealing strip 62, a lower sealing strip 63, and a front sealing ring 61. The mating surfaces of the left housing 11 and the right housing 12 are symmetrically provided with grooves 100 for the upper sealing strip 62 and the lower sealing strip 63 to be embedded on the upper and lower sides of the front section of the cavity C and the internal thread interface 10, respectively. The left housing 11 and the right housing 12 are recessed with annular grooves 200 for the front sealing ring 61 to be embedded on the inner wall of the rear side of the internal thread section of the internal thread interface 10. The upper sealing strip 62, the lower sealing strip 63, and the front sealing ring 61 are integral parts. The rear ends of the upper sealing strip 62 and the lower sealing strip 63 are provided with connecting holes 60. After the sealing strip 6 is positioned, it is fixed to the gun body 1 by screws. The upper end face of the gun body 1 is recessed with a groove 1b for mounting and sliding the pull rod sleeve 7. The length of the groove 1b is the same as that of the guide groove 1a. The pull rod sleeve 7 can be slidably fitted onto the groove 1b. The lower end of the pull rod sleeve 7 has a strip hole 71 that connects to the guide strip 32 at the rear end of the pull rod 3. Thus, pushing the pull rod sleeve 7 will drive the pull rod 3 to move, making operation very convenient. The color of the sealing ring 20 is different from the color of the measuring column 2 for easy observation. When the pull rod 3 moves to its rear position, the position of the sealing ring 20 corresponds to the zero point of the scale 1c.

[0029] The specific operation process is as follows: Figure 4 As shown:

[0030] Connect the connector A to be tested to the muzzle of the gun body 1 via thread;

[0031] Push the lever sleeve 7 backward until it stops noticeably, then push it forward slightly until it stops noticeably, and finally push it backward to the rear end of the slide groove 1b.

[0032] Pull the wrench 8, and the measuring column 2 will begin to move slowly forward. Read the leakage of the connector A under test according to the scale. When the required value is reached, the connector is qualified.

[0033] Push the pull rod sleeve 7 forward until it returns to its original position at the front end of the slide groove 1b.

[0034] Working principle as follows Figure 5 As shown:

[0035] When the connector A under test is removed, air is filled into the cavity, and the measuring column 2 can be pushed to the front end, that is, the pull rod sleeve 7 can slide forward to the initial position; so that the measuring column 2 and the pull rod 3 are locked together by the elastic lock 5.

[0036] When the connector under test A is inserted, a sealed cavity B is formed between the measuring post 2, the sealing strip 6, and the connector under test A.

[0037] Pulling the lever sleeve 7 backward causes the lever 3 to move the measuring column 2 backward. The sealed cavity B is under negative pressure. When the lever 3 moves into place, the measuring column 2 is locked by the wrench lock 4 and cannot move forward or backward.

[0038] Push the lever 3 forward and then push it backward to unlock and disengage the measuring column 2 from the lever 3 through the elastic lock 5;

[0039] Pulling the wrench 8 separates the wrench lock 4 from the measuring column 2. The negative pressure in the sealed cavity B will cause the measuring column 2 to move forward. If the connector is qualified, the measuring column 2 will move forward to the corresponding value according to the volume inside the connector cavity; if the connector is unqualified, the measuring column 2 will not respond or will not move to the corresponding value.

[0040] The locking and unlocking of measuring column 2, elastic buckle 5 and pull rod 3 are as follows: Figure 6 As shown,

[0041] When the pull rod 3 moves forward into position, the elastic lock 5 engages in the connector 22 of the measuring column 2;

[0042] When the lever 3 moves backward and the measuring column 2 is locked by the wrench latch 4 (after feeling a noticeable pause), push the lever 3 forward, and the elastic latch 5 will retract to the rear of the connector 22 (after feeling a noticeable pause). Then push the lever 3 backward again, and the elastic latch 5 will push the connector 22 forward to the bottom. At this time, the elastic latch 5 will separate from the measuring column 2 along the arc surface.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A portable air gun, comprising a gun body, characterized in that: The front muzzle of the gun body is an internally threaded interface that connects to the connector under test. The gun body has a transverse cavity that communicates with the internally threaded interface. Within the cavity are a measuring column and a pull rod that can move back and forth. The pull rod is positioned at the rear of the cavity with limited forward and backward movement. The measuring column is located at the front of the pull rod. The front end of the pull rod has an elastic latch that can be detachably connected to the rear end of the measuring column. When the connector under test is inserted into the muzzle and positioned, a sealed cavity is formed between the front end of the measuring column and the connector under test. A wrench latch for locking or unlocking the measuring column is located in the lower rear part of the cavity within the gun body. One end of the wrench latch is kept locked to the measuring column by the wrench spring, while the other end of the wrench latch abuts against the wrench. When the pull rod moves forward to its position, the measuring column connects to the pull rod. During measurement, the pull rod moves backward, causing the measuring column to move backward. The sealed cavity is under negative pressure. When the wrench latch is in position, the measuring column is locked and positioned. The pull rod moves forward and then continues to move backward, disengaging the measuring column from the pull rod. Pulling the wrench releases the wrench latch from the measuring column, and the negative pressure in the sealed cavity causes the measuring column to move forward. The gun body is equipped with a scale that can measure the movement distance of the measuring column.

2. The portable gas measuring gun according to claim 1, characterized in that: The gun body is formed by joining a left shell and a right shell. The cavity is divided into front and rear sections. The front end of the front section is a tapered opening with a gradually narrowing diameter, which is connected to an internal thread interface. The front end of the pull rod is cylindrical, corresponding to the cavity. Guide posts are protruding on the left and right sides of the front end of the pull rod, and guide strips are provided on the left and right sides of the rear end. Guide grooves are provided on the left and right sides of the gun body, corresponding to the position of the rear section of the cavity, for the guide posts and guide strips to be inserted and slide back and forth. The scale is set on the lower front side of the guide groove.

3. The portable gas measuring gun according to claim 2, characterized in that: The measuring column is cylindrical, with an annular groove formed on the outer circumference of the front end. A sealing ring is embedded in the annular groove and seals against the inner wall of the cavity. The rear end of the measuring column has a connector head that cooperates with the elastic buckle for locking and unlocking. The front end of the pull rod has a cavity for the connector head to be inserted. There are two elastic buckles arranged opposite each other on the left and right. The guide posts on the left and right sides of the front end of the pull rod have through holes in the middle that communicate with the cavity. The elastic buckles are installed in the through holes and cooperate with the connector head for locking.

4. The portable gas measuring gun according to claim 3, characterized in that: The connector includes a fixed head and a movable head. The fixed head is hemispherically connected to the rear end of the measuring column, and the movable head is sleeved on the front side of the fixed head. A small spring supports the movable head and the fixed head, and an annular groove is formed between the movable head and the fixed head for the elastic latch to engage. The elastic latch is composed of a latch body and a latch spring. The inner end of the latch body is a latch head that mates with the connector. The latch head passes through the through hole of the guide column and is inserted into the cavity. The insertion surface of the latch head corresponding to the connector is an inclined surface that facilitates engagement. The outer end of the latch body is provided with a stop block that abuts against the outer wall of the guide column. The latch spring is sleeved on the latch body. One end of the latch spring abuts against the latch head, and the other end abuts against the inner wall of the through hole, so that the latch body always tends to lock inward with the connector.

5. The portable gas measuring gun according to claim 4, characterized in that: The rear section of the cavity, corresponding to the lower part of the measuring column when the pull rod moves backward, has a notch for inserting the upper end of the wrench lock. The wrench lock is rotatably mounted in the gun body via a pivot pin, located below the notch. The lower end face of the measuring column has a slot for the wrench lock to engage. A wrench spring supports the lower end of the wrench lock and the inner wall of the gun body, so that the wrench lock tends to always lock with the measuring column.

6. The portable gas measuring gun according to claim 5, characterized in that: The wrench is rotatably mounted on the gun body. The upper end of the wrench has a locking block that abuts against the other end of the wrench latch. When the wrench is pulled, the locking block causes the wrench latch to rotate and disengage from the latch of the measuring column, allowing the measuring column to move forward.

7. The portable gas measuring gun according to any one of claims 2 to 6, characterized in that: A sealing strip is embedded between the left and right housings at the position corresponding to the front section of the cavity and the internal thread interface. The sealing strip consists of an upper sealing strip, a lower sealing strip, and a front sealing ring. The mating surfaces of the left and right housings are respectively provided with grooves for the upper and lower sealing strips to be embedded on the upper and lower sides of the front section of the cavity and the internal thread interface. The inner wall of the left and right housings corresponding to the internal thread section of the internal thread interface is recessed with an annular groove for the front sealing ring to be embedded.

8. The portable gas measuring gun according to claim 7, characterized in that: The upper sealing strip, lower sealing strip, and front sealing ring are integrated into one piece. The upper and lower sealing strips have connecting holes at their rear ends. After the sealing strips are positioned, they are fixed to the gun body with screws.

9. The portable gas measuring gun according to any one of claims 2 to 6, characterized in that: The upper end face of the gun body is recessed with a groove for mounting the pull rod sleeve and allowing it to slide back and forth. The length of the groove is the same as that of the guide groove. The pull rod sleeve can be slidably fitted onto the groove. The lower end of the pull rod sleeve is provided with a strip-shaped hole that connects to the guide strip at the rear end of the pull rod.

10. The portable gas measuring gun according to any one of claims 3 to 6, characterized in that: The color of the sealing ring is different from the color of the measuring column. When the pull rod moves back to its position, the position of the sealing ring corresponds to the zero point of the scale.

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