Portable air measuring gun

Abstract

A portable air measuring gun comprises a gun body, a muzzle is provided with an internal thread interface, a cavity communicated with the muzzle is transversely arranged in the gun body, a measuring column and a pull rod which can move back and forth are arranged in the cavity, the measuring column is arranged in front of the pull rod, and the pull rod is provided with an elastic lock catch which is detachably connected with the measuring column. When the pull rod moves forwards in place, the measuring column is connected with the pull rod, and during measurement, the pull rod moves backwards to drive the measuring column to move to the position of the wrench lock catch, the measuring column is positioned and locked, and the pull rod moves forwards and then continues to move backwards to be separated from the measuring column. When the wrench is pulled, the wrench lock catch is separated from the measuring column, the measuring column moves forwards, and scales capable of measuring the moving distance of the measuring column are arranged on the gun body. The device is simple and small in structure and convenient to carry, gas testing can be achieved without power connection and gas connection, and testing is convenient and reliable.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of airtight detection, and relates to a portable gas gun for connector sealing test. BACKGROUND

[0002] Connectors are indispensable components in electronic devices, which are used to connect two active devices to transmit current or signals. Connectors are indispensable components in electronic devices, which are used to connect two active devices to transmit current or signals. According to the use environment of the connector, part of the connector needs to have good airtightness, so the airtightness test of the connector is of great significance.

[0003] At present, the airtightness testing tools on the market are relatively large in size, not easy to carry, occupy a large working area, and all need to be assisted by electricity, gas and other external factors to realize the function of measuring gas, and cannot be used to test the product at any time.

[0004] After investigation, the existing patent No. CN201821966649.9 ''Connector airtightness detection structure'' includes an airtightness detection structure body, the airtightness detection structure body is provided with a switch button, the airtightness detection structure body is provided with an aluminum cavity, a probe and an airtightness air hole are arranged on the airtightness detection structure body and located in the interior of the aluminum cavity, and a switch needle is arranged on the airtightness detection structure body. The airtightness detection structure body is also provided with a gas cylinder interface, and the gas cylinder interface is connected with a gas cylinder. The structure can accurately detect the airtightness of the connector, but needs to be provided with a gas cylinder and other components, which not only has a complex structure, but also is large in size and not easy to carry, and is not convenient to use. SUMMARY

[0005] The technical problem to be solved by the application is to provide a portable gas gun which is simple and small in structure, convenient to operate and carry, and does not need power.

[0006] The application solves the above technical problems by the following technical scheme: a portable gas measuring gun, comprising a gun body, characterized in that: a front end of the gun body is an inner threaded interface connected with a measured connector, a cavity is transversely arranged in the gun body and penetrates the inner threaded interface, a measuring column capable of moving forward and backward is arranged in the cavity, and a pull rod capable of moving forward and backward is arranged in a rear section of the cavity, the measuring column is arranged on a front side of the pull rod, an elastic lock catch is arranged on a front end of the pull rod and capable of detachable connection with a rear end of the measuring column, a sealed cavity is formed between a front end of the measuring column and the measured connector after the measured connector is inserted into the gun mouth and positioned, a spanner lock catch capable of locking or unlocking the measuring column is arranged at a lower end of the cavity, one end of the spanner lock catch is always locked with the measuring column under the action of a spanner spring, the other end of the spanner lock catch is in abutment with a spanner, the measuring column is connected with the pull rod when the pull rod moves forward to a position, the measuring column is locked and positioned when the pull rod moves backward to the position of the spanner lock catch during measurement, the measuring column is separated from the pull rod when the pull rod moves forward and then moves backward again, the spanner lock catch is separated from the measuring column when the spanner is cocked, the measuring column can move forward, and a scale for measuring the moving distance of the measuring column is arranged on the gun body.

[0007] Further, the gun body is formed by closing a left shell and a right shell, the cavity is divided into two sections, a front end of the front section is connected with the inner threaded interface in a tapered shape with a gradually reduced diameter, a front end of the pull rod is in a cylindrical shape corresponding to the cavity, guide columns are arranged on left and right sides of the front end of the pull rod, guide strips are arranged on left and right sides of a rear end of the pull rod, guide sliding grooves are arranged on left and right sides of the gun body corresponding to positions of the rear section of the cavity, and the scale is arranged below and on a front side of the guide sliding grooves.

[0008] Further, the measuring column is in a cylindrical shape, an annular groove is formed on an outer circumferential surface of a front end of the measuring column, a sealing ring is embedded in the annular groove and in sealing abutment with an inner wall of the cavity, a connecting head capable of locking and unlocking is arranged on a rear end of the measuring column, a recessed cavity is arranged on a front end surface of the pull rod for inserting the connecting head, the elastic lock catch is arranged on left and right sides of the pull rod, a through hole is arranged in a middle part of the guide column on the left and right sides of the front end of the pull rod and connected with the recessed cavity, and the elastic lock catch is installed in the through hole and capable of locking and unlocking with the connecting head.

[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; Figure 2 This is a perspective view (in perspective) of an embodiment of the present invention. Figure 3 This is an exploded view of an embodiment of the present invention; Figure 4 This is a schematic diagram of the testing process according to an embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the working principle of an embodiment of the present invention; Figure 6 This corresponds to the embodiments of the present invention. Figure 5 A sectional view (viewed from top). Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] The specific operating procedure is as follows: Figure 4 As shown: Connect the connector A to be tested to the muzzle of the gun body 1 via thread; 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. 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. Push the pull rod sleeve 7 forward until it returns to its original position at the front end of the slide groove 1b.

[0025] Working principle as follows Figure 5 As shown: 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. 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.

[0026] 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. 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; 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.

[0027] The locking and unlocking of measuring column 2, elastic buckle 5 and pull rod 3 are as follows: Figure 6 As shown, When the pull rod 3 moves forward into position, the elastic lock 5 engages in the connector 22 of the measuring column 2; 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.

[0028] 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 internal threaded interface that connects to the connector under test. The gun body has a transverse cavity that communicates with the internal threaded interface. Inside 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 locking mechanism for the measuring column is located at the lower rear part of the cavity within the gun body. Alternatively, the wrench latch can be unlocked. One end of the latch is kept locked by the wrench spring, while the other end abuts against the wrench. When the lever moves forward to its position, the measuring column connects to the lever. During measurement, when the lever moves backward, it moves the measuring column backward to the wrench latch position, where the measuring column is locked and positioned. When the lever moves forward and then backward again, the measuring column disengages from the lever. Pulling the wrench releases the wrench latch from the measuring column, and the measuring column moves forward. The gun body has a scale for measuring the distance the measuring column moves.

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 sliding groove for the installation and back-and-forth sliding of the pull rod sleeve. The length of the sliding groove is the same as that of the guide groove. The pull rod sleeve can be slidably fitted onto the sliding 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.

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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