CN210025345U - Suction and discharge device and vacuum generator thereof - Google Patents
Suction and discharge device and vacuum generator thereof Download PDFInfo
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- CN210025345U CN210025345U CN201920839801.5U CN201920839801U CN210025345U CN 210025345 U CN210025345 U CN 210025345U CN 201920839801 U CN201920839801 U CN 201920839801U CN 210025345 U CN210025345 U CN 210025345U
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Abstract
The utility model discloses a inhale and put device and vacuum generator thereof inhales and puts the device including inhaling carrier and vacuum generator of putting. The vacuum generator comprises a generator main body, the generator main body is provided with an air flow channel, an air exhaust port and a connecting port, the air exhaust port is communicated with the air flow channel, the connecting port is also provided with a first air inlet channel and a second air inlet channel, the first air inlet channel is inclined towards the outside-in direction far away from the air exhaust port, the second air inlet channel is inclined towards the outside-in direction close to the air exhaust port, and the first air inlet channel and the second air inlet channel are respectively communicated with the air flow channel. The absorbing and releasing carrier is provided with an absorbing through hole in a penetrating way, and the connecting port is communicated with the absorbing through hole. When the first air inlet channel is inflated, the suction and release carrier blows out the workpiece; when the second air inlet channel is inflated, the suction and discharge carrier tightly sucks the workpiece. The event the utility model discloses a inhale and put the device and satisfied one with the help of the generator main part and inhaled the demand of putting simultaneously to reach the purpose of convenient unloading of going up.
Description
Technical Field
The utility model relates to a vacuum apparatus field especially relates to a inhale and put device and vacuum generator thereof.
Background
With the development of science and technology and the advancement of humanity, the industry develops rapidly, various processing equipment is improved in accordance with the development of the times and the huge market demands, and the vacuumizing equipment is one of the common equipment in the processing equipment.
For a sheet-like workpiece, a vacuum adsorption device is usually used to adsorb the workpiece for taking the workpiece or release the workpiece for discharging the workpiece. A conventional vacuum suction apparatus includes a vacuum generator and a suction nozzle. The general vacuum generator comprises a Laval nozzle, wherein an air flow channel, an air supply port, an air exhaust port and a vacuum port are arranged inside the Laval nozzle, the air supply port is communicated with one end of the air flow channel, the air exhaust port is communicated with the other end of the air flow channel, the vacuum port is communicated with the middle part of the air flow channel, and a suction nozzle is communicated with the vacuum port; therefore, when the workpiece is adsorbed, the gas supply port is connected with high-flow-rate gas, and the high-flow-rate gas is quickly discharged from the exhaust port along the gas flow channel, so that negative pressure is formed at the vacuum port, and negative pressure is formed at the suction nozzle, so that the suction nozzle adsorbs the workpiece by means of the negative pressure.
Just because the existing vacuum adsorption device can only enable the suction nozzle to form negative pressure when high-flow-rate gas is connected in, when a workpiece is released, the connection of the high-flow-rate gas can only be suspended, so that the blanking speed of the workpiece is slow.
More importantly, for a workpiece with a small size and a small suction surface, such as but not limited to a lens frame of a camera used in a smart phone, a tablet computer or a notebook computer, since the suction surface is beyond the range that the suction nozzle can suck, the suction nozzle cannot suck or release the workpiece.
Therefore, there is a need for a suction device and a vacuum generator thereof capable of forming positive and negative pressure to accelerate the blanking process.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can form the vacuum generator of positive negative pressure in order to accelerate the unloading.
Another object of the utility model is to provide a can form the device is put in order to inhale that can accelerate the unloading of positive negative pressure.
In order to achieve the above object, the utility model discloses a vacuum generator includes the generator main part, the generator main part has been seted up and has been run through the airflow channel at generator main part both ends and with the gas vent and the connector of airflow channel intercommunication, the generator main part has still been seted up and has been located first inlet channel and second inlet channel between gas vent and the connector, first inlet channel is towards keeping away from the direction outside-in slope of gas vent, second inlet channel is towards being close to the direction outside-in slope of gas vent, first inlet channel reaches second inlet channel respectively with airflow channel is linked together.
Preferably, the first air inlet channel is adjacent to the exhaust port, and the second air inlet channel is adjacent to the connection port.
Preferably, the side wall of the generator main body is provided with a first air inlet and a second air inlet, the first air inlet is communicated with the first air inlet channel, and the second air inlet is communicated with the second air inlet channel.
Preferably, the generator main body further defines a first filling flow channel and a second filling flow channel, the first air inlet is communicated with the first air inlet channel through the first filling flow channel, and the second air inlet is communicated with the second air inlet channel through the second filling flow channel.
Preferably, the first filling flow channel and the second filling flow channel are annular, the first filling flow channel and the second filling flow channel are arranged at intervals, and the first air inlet channel and the second air inlet channel are both located between the first filling flow channel and the second filling flow channel.
Preferably, the number of the first air inlet passages is at least two, and all the first air inlet passages are in a converging shape from outside to inside towards the direction away from the exhaust port; the number of the second air inlet channels is at least three, and all the second air inlet channels are folded from outside to inside along the direction close to the air outlet.
Preferably, the generator body includes a first portion and a second portion, the first portion and the second portion are a split structure, the first air inlet channel and the second air inlet channel are located at the first portion, the air outlet is located at an end of the first portion, and the connection port is located at an end of the second portion.
Preferably, the vacuum generator further includes a first air inlet cylinder and a second air inlet cylinder, the first air inlet cylinder is sleeved on one end of the first portion close to the air outlet, the second air inlet cylinder is sleeved on one end of the first portion far from the air outlet, a first filling flow channel is enclosed between the first air inlet cylinder and the generator main body, the first filling flow channel is communicated with the first air inlet channel, a first air inlet is further penetratingly formed in a side wall of the first air inlet cylinder, and the first air inlet is communicated with the first filling flow channel; a second filling flow channel is enclosed between the second air inlet cylinder and the generator main body, the second filling flow channel is communicated with the second air inlet channel, a second air inlet is formed in the side wall of the second air inlet cylinder in a penetrating mode, and the second air inlet is communicated with the second filling flow channel.
In order to achieve the above object, the utility model discloses an inhale put device is including inhaling and put carrier and aforementioned vacuum generator, inhale and put the carrier and run through and seted up the absorption through-hole, the connector with the absorption through-hole intercommunication.
Preferably, the suction carrier is provided with a receiving groove for receiving an adsorption workpiece, and the adsorption through holes are multiple and are respectively located at the bottom surface of the receiving groove.
Compared with the prior art, the utility model discloses a vacuum generator inclines towards the direction outside-in that keeps away from the gas vent with the help of the first inlet channel of generator main part, so when the air supply entered from first inlet channel, high-speed gas was through the first inlet channel of slope then reentrant airflow channel, and gas was advanced towards the direction of connector, and the connector at this moment is the malleation state, and with the help of the connector, vacuum generator is connected with the suction and release carrier, so the malleation gas in the connector blows off the work piece on the suction and release carrier; because the second air inlet channel of the generator main body inclines from outside to inside towards the direction close to the air outlet, when the air source enters from the second air inlet channel, high-speed air passes through the inclined second air inlet channel and then enters the air flow channel, the air advances towards the direction of the air outlet and is finally discharged from the air outlet. Therefore, the novel suction and discharge device is used, and the suction and discharge carrier blows out the workpiece when the first air inlet channel is inflated by means of the mutual matching of the first air inlet channel and the second air inlet channel; when inflating toward the second inlet channel, inhale and put the carrier and inhale tight work piece, so the utility model discloses an inhale and put the device and satisfied one simultaneously with the help of a generator main part and put the demand to reach the purpose of convenient unloading of going up, especially when to small-size work piece, the utility model discloses an inhale and put the device again with the help of inhaling and put the absorption through-hole on the carrier, can be applicable to one with small-size work piece and inhale the occasion of putting. In addition, the vacuum generator and the sucking and releasing device of the utility model also have the advantage of simple structure.
Drawings
Fig. 1 is a schematic perspective view of the suction device of the present invention.
Fig. 2 is a schematic front view of the suction device of the present invention.
Fig. 3 is a schematic top view of the suction device of the present invention.
Fig. 4 is a schematic sectional view of the suction device of the present invention taken along the H-H cutting line in fig. 3.
Fig. 5 is a schematic perspective view of the suction device of the present invention from another angle.
Fig. 6 is a top view of fig. 5.
Fig. 7 is a sectional view of fig. 6 taken along section line I-I.
Detailed Description
In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.
Referring to fig. 1 to 7, the suction device 100 of the present invention includes a suction carrier 20 and a vacuum generator 10, wherein the vacuum generator 10 is connected to the suction carrier 20. It can be understood that the suction carrier 20 is used for carrying workpieces, and the vacuum generator 10 of the present invention blows out the workpieces on the suction carrier 10 or tightly sucks the workpieces on the suction carrier 20.
Referring to fig. 1 to 7, a vacuum generator 10 of the present invention includes a generator body 1, a first air inlet cylinder 2 and a second air inlet cylinder 3. Generator body 1 is seted up and is run through the airflow channel 11 at generator body 1 both ends and the gas vent 12 and the connector 13 of communicating with airflow channel 11, still set up first inlet channel 15 and the second inlet channel 16 that are located between gas vent 12 and connector 13 in the generator body 1, first inlet channel 15 inclines towards the direction outside-in that keeps away from gas vent 12, second inlet channel 16 inclines towards the direction outside-in that is close to gas vent 12, first inlet channel 15 and second inlet channel 16 are linked together with airflow channel 11 respectively. Specifically, in the present embodiment, the generator main body 1 includes the first portion 1A and the second portion 1B, and the first portion 1A and the second portion 1B are split structures, so that the generator main body 1 is more convenient to produce and manufacture, and the processing cost is reduced; of course, in other embodiments, the first portion 1A and the second portion 1B are an integral structure, and therefore, the disclosure is not limited thereto. It can be understood that the first portion 1A and the second portion 1B are detachably and fixedly connected, for example, the first portion 1A and the second portion 1B are connected by a snap-fit connection, but not limited thereto. More specifically, in the present embodiment, the first intake passage 15 and the second intake passage 16 are located at the first portion 1A, the exhaust port 12 is located at the end of the first portion 1A, and the connection port 13 is located at the end of the second portion 1B. It will be appreciated that the end of the first portion 1A where the exhaust port 12 is located and the end of the second portion 1B where the connection port 13 is located are located at two ends of the generator body 1 that are away from each other, respectively. Preferably, in the present embodiment, the first air inlet channel 15 is disposed adjacent to the air outlet 12, and the second air inlet channel 16 is disposed adjacent to the connection port 13, so that the suction force caused by the negative pressure formed at the connection port is greater; of course, in other embodiments, the first air inlet passage 15 is adjacent to the connection port 13, and the second air inlet passage 16 is adjacent to the exhaust port 13, so that a positive pressure or a negative pressure state can be formed at the connection port 13, and the present invention is not limited thereto. More specifically, the following:
referring to fig. 1, 4, 5 and 7, the suction carrier 20 has a suction through hole 202 formed therethrough, and the connection port 13 is communicated with the suction through hole 202. The suction carrier 20 is opened with a receiving groove 201 for receiving the suction workpiece, and the suction through holes 202 are plural and are respectively located at the bottom surface of the receiving groove 201. Specifically, in the present embodiment, the number of the receiving grooves 201 is eight, but not limited thereto. Accommodate including recess 201 is used for bearing the adsorbed work piece, with the help of accommodating recess 201, make the utility model discloses an inhale and put device 100 more is applicable to the last unloading of small-size work piece. By means of the suction through hole 202, the pressure state of the connection port 13 of the vacuum generator 10 can be transmitted to the suction through hole 202, and the suction through hole 202 is forced to make a suction or blowing reaction. For example, when the pressure at the connection port 13 is greater than the atmospheric pressure, the adsorption through hole 202 is forced to blow out gas to discharge the workpiece; when the pressure at the connecting port 13 is lower than the atmospheric pressure, the suction through hole 202 is forced to suck the external air to tightly suck the workpiece, thereby completing the feeding.
Referring to fig. 4 and 7, there are two first intake passages 15, and all the first intake passages 15 converge from outside to inside in a direction away from the exhaust port 12. Therefore, by means of the furled arrangement of all the first air inlet channels 15, when the high-speed air source enters the airflow channel 11 from the first air inlet channels 15, the connecting port 13 can be quickly filled with positive pressure air, so that the pressure in the connecting port 13 is greater than atmospheric pressure, and the air is forced to be discharged from the connecting port 13, so that the workpiece on the suction and discharge carrier 20 connected with the vacuum generator 10 through the connecting port 13 is blown out by the positive pressure air source, the workpiece is quickly discharged, and the technical problem of slow workpiece discharging is solved. Similarly, the number of the second intake passages 16 is 8, and all the second intake passages 16 are closed from the outside to the inside in the direction close to the exhaust port 12. Therefore, by means of the furled arrangement of all the second air inlet channels 16, when the high-speed air source enters the airflow channel 11 from the second air inlet channel 16, the air is discharged from the airflow channel 11 to the exhaust port 12 at high speed, so that the air in the airflow channel 1 adjacent to the connecting port 13 is taken away together, and the connecting port 13 temporarily forms a negative pressure state, and since the pressure of the connecting port 13 is lower than the atmospheric pressure, the external air is forced to enter the airflow channel 11 through the connecting port 13 and is discharged from the exhaust port 12, the suction and discharge carrier 20 communicated with the connecting port 13 has an adsorption capacity, so that the workpiece on the suction and discharge carrier 20 can be sucked tightly. Preferably, all the first air inlet channels 15 are arranged symmetrically; all the second air inlet channels 16 are symmetrically arranged, so that the flow velocity of the air entering the air flow channel 11 is stable, and the workpieces sucked on the carrier 20 can be stably blown out or sucked. It is understood that, in other embodiments, the number of the first intake passages 15 may be three, four or five, and the number of the second intake passages 16 may be four, five or 6 or 10, so the number of the first intake passages 15 and the second intake passages 16 is not limited thereto.
Referring to fig. 1, the first air inlet cylinder 2 is sleeved on one end of the first portion 1A close to the air outlet 12, and the second air inlet cylinder 3 is sleeved on one end of the first portion 1A far from the air outlet 12. A first filling flow channel 21 is defined between the first air inlet cylinder 2 and the generator main body 1, the first filling flow channel 21 is communicated with the first air inlet channel 15, a first air inlet 22 is further penetratingly arranged on the side wall of the first air inlet cylinder 2, and the first air inlet 22 is communicated with the first filling flow channel 21. Therefore, the first gas inlet 22 is connected to an external gas source, and the first filling flow channel 21 allows the high-speed gas just accessed from the first gas inlet 22 to pass through the first filling flow channel 21 and then enter the first gas inlet channel 15, so that the gas source is more stably input into the first gas inlet channel 15. Similarly, a second filling flow channel 31 is defined between the second air inlet cylinder 3 and the generator main body 1, the second filling flow channel 31 is communicated with the second air inlet channel 16, a second air inlet 32 is further formed in the side wall of the second air inlet cylinder 3 in a penetrating manner, and the second air inlet 32 is communicated with the second filling flow channel 31. Therefore, the second gas inlet 32 is connected to an external gas source, and the second filling channel 31 allows the high-speed gas just accessed from the second gas inlet 32 to pass through the second filling channel 31 and then enter the second gas inlet channel 16, so that the gas source is more stably input into the second gas inlet channel 16.
Referring to fig. 4 and 7, the first filling channel 21 and the second filling channel 31 are annular, and the first filling channel 21 and the second filling channel 31 are arranged at intervals; preferably, the first and second intake passages 15 and 16 are located between the first and second filling flow passages 21 and 31, thereby making more efficient use of the space of the generator body 1.
Please refer to fig. 1 to 7, the first air inlet cylinder 2, the second air inlet cylinder 3 and the generator main body 1 are detachably connected, and the generator main body 1 is a split structure, so the utility model discloses a during the installation of vacuum generator 10, the first air inlet cylinder 2 is cup jointed on the first part 1A of generator main body 1 from the one end of gas vent 12, the second air inlet cylinder 3 is cup jointed on the first part 1A of generator main body 1 from the one end opposite to the gas vent 12 back to back, the first part 1A is reassembled with the second part 1B, so the generator main body 1 is a split structure for being detachably connected with the generator main body 1 by means of the first air inlet cylinder 2, the second air inlet cylinder 3 and the generator main body 1, so greatly reduced the difficulty of the manufacturing process of vacuum generator 10 and the manufacturing cost, make the assembly of the utility model discloses a vacuum generator 10 is more convenient.
It is understood that, in other embodiments, when the first air inlet cylinder 2, the second air inlet cylinder 3 and the first portion 1A and the second portion 1B of the generator body 1 are simultaneously of an integral structure, the vacuum generator of the integral structure is the second embodiment of the present invention. The following explains a vacuum generator according to a second embodiment of the present invention:
the vacuum generator of the second embodiment comprises a generator body, wherein the generator body is provided with an air flow channel penetrating through two ends of the generator body, an air exhaust port communicated with the air flow channel and a connecting port, the generator body is further provided with a first air inlet channel and a second air inlet channel between the air exhaust port and the connecting port, the first air inlet channel inclines from outside to inside in the direction away from the air exhaust port, the second air inlet channel inclines from outside to inside in the direction close to the air exhaust port, and the first air inlet channel and the second air inlet channel are communicated with the air flow channel respectively. The side wall of the generator main body is provided with a first air inlet and a second air inlet, the first air inlet is communicated with the first air inlet channel, and the second air inlet is communicated with the second air inlet channel. The generator main body is also provided with a first filling flow channel and a second filling flow channel, the first air inlet is communicated with the first air inlet channel through the first filling flow channel, and the second air inlet is communicated with the second air inlet channel through the second filling flow channel.
It should be noted that the structures of the first air inlet channel, the second air inlet channel, the first filling channel and the second filling channel of the vacuum generator of the second embodiment are the same as those of the first embodiment, and therefore are not described herein.
The operation principle and the operation mode of the vacuum generator 10 and the suction device 100 having the vacuum generator 10 according to the present invention will be described with reference to the accompanying drawings: when the suction device 100 of the present invention is used in cooperation with a manipulator or other moving device, and high-speed gas is introduced into the first gas inlet 22, the gas passes through the first filling flow channel 21, then passes through the first gas inlet channel 15, enters the gas flow channel 11, and moves forward toward the connecting port 13, so that the pressure of the connecting port 13 is increased, and the gas is discharged through the connecting port 13, and therefore, a workpiece on the suction carrier 20 is blown out; when high-speed gas is introduced into the second gas inlet 32, the gas passes through the second filling channel 31, then passes through the second gas inlet channel 16, enters the gas flow channel 11, and flows out toward the gas outlet 12, so that the gas in the part of the gas flow channel adjacent to the connecting port 13 is forced to be carried out to the gas outlet 12, the connecting port 13 is in a negative pressure state at the moment, and the suction and discharge carrier 20 communicated with the connecting port 13 adsorbs workpieces.
Compared with the prior art, the utility model discloses a vacuum generator 10 inclines towards the direction outside-in that keeps away from gas vent 12 with the help of first inlet channel 15 of generator main part 1, and first inlet channel 15 locates the one end that is close to gas vent 12, so when the air supply enters from first inlet channel 15, high-speed gas passes through the first inlet channel 15 of slope and then gets into airflow channel 11 again, gas advances towards the direction of connector 13, connector 13 at this moment is the malleation state, with the help of connector 13, vacuum generator 10 is connected with suction and release carrier 20, so the malleation gas in connector 13 blows off the work piece on suction and release carrier 20; since the second air inlet channel 16 of the generator body 1 is inclined from outside to inside in the direction close to the air outlet 12, when the air source enters from the second air inlet channel 16, the high-speed air passes through the inclined second air inlet channel 16 and then enters the airflow channel 11, the air advances in the direction of the air outlet 12 and finally is discharged from the air outlet 12, and since the air source flows at a high speed, the air in the airflow channel 11 adjacent to the connecting port 13 is sucked out of the air outlet 12, the connecting port 13 is in a negative pressure state at this time, and the workpiece on the suction and discharge carrier 20 communicated with the connecting port 13 is sucked tightly. Therefore, the novel suction and discharge device 100 is used for blowing the workpiece out of the suction and discharge carrier 20 when the first air inlet channel 15 is inflated by the mutual matching of the first air inlet channel 15 and the second air inlet channel 16; when inflating toward second inlet channel 16, inhale and put carrier 20 and inhale tight work piece, so the utility model discloses an inhale and put device 100 with the help of a generator main part 1, satisfied simultaneously and have inhaled one and put the demand to reached the purpose of convenient unloading of going up, especially when to small-size work piece, the utility model discloses an inhale and put device 100 again with the help of inhaling and put absorption through-hole 202 on the carrier 20, can be applicable to one with small-size work piece and inhale the occasion of putting. In addition, the vacuum generator 10 and the suction device 100 of the present invention have the advantage of simple structure.
The above disclosure is only a preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereby, and all the equivalent changes made in the claims of the present invention are intended to be covered by the present invention.
Claims (10)
1. A vacuum generator comprises a generator body, wherein the generator body is provided with an airflow channel penetrating through two ends of the generator body, an air exhaust port communicated with the airflow channel and a connector, and is characterized in that the generator body is further provided with a first air inlet channel and a second air inlet channel between the air exhaust port and the connector, the first air inlet channel inclines towards the outside and the inside in the direction away from the air exhaust port, the second air inlet channel inclines towards the outside and the inside in the direction close to the air exhaust port, and the first air inlet channel and the second air inlet channel are respectively communicated with the airflow channel.
2. The vacuum generator as claimed in claim 1, wherein the first air intake passage is provided adjacent to the exhaust port, and the second air intake passage is provided adjacent to the connection port.
3. The vacuum generator as claimed in claim 1, wherein the side wall of the generator main body is opened with a first inlet and a second inlet, the first inlet is communicated with the first inlet channel, and the second inlet is communicated with the second inlet channel.
4. The vacuum generator as claimed in claim 3, wherein the generator body further defines a first filling flow passage and a second filling flow passage, the first inlet port is communicated with the first inlet channel via the first filling flow passage, and the second inlet port is communicated with the second inlet channel via the second filling flow passage.
5. The vacuum generator as claimed in claim 4, wherein the first and second filling flow passages are annular, the first and second filling flow passages are in a spaced arrangement, and the first and second air inlet passages are both located between the first and second filling flow passages.
6. The vacuum generator as claimed in claim 1, wherein the number of the first air inlet passages is at least two, and all of the first air inlet passages converge from outside to inside in a direction away from the air outlet; the number of the second air inlet channels is at least three, and all the second air inlet channels are folded from outside to inside along the direction close to the air outlet.
7. The vacuum generator as claimed in claim 1, wherein the generator body comprises a first portion and a second portion, the first portion and the second portion are a split structure, the first air inlet channel and the second air inlet channel are located at the first portion, the exhaust port is located at an end of the first portion, and the connection port is located at an end of the second portion.
8. The vacuum generator according to claim 7, further comprising a first air inlet cylinder and a second air inlet cylinder, wherein the first air inlet cylinder is sleeved on one end of the first portion close to the air outlet, the second air inlet cylinder is sleeved on one end of the first portion away from the air outlet, a first filling flow passage is defined between the first air inlet cylinder and the generator main body, the first filling flow passage is communicated with the first air inlet passage, a first air inlet is further penetratingly formed in a side wall of the first air inlet cylinder, and the first air inlet is communicated with the first filling flow passage; a second filling flow channel is enclosed between the second air inlet cylinder and the generator main body, the second filling flow channel is communicated with the second air inlet channel, a second air inlet is formed in the side wall of the second air inlet cylinder in a penetrating mode, and the second air inlet is communicated with the second filling flow channel.
9. A suction and discharge device comprises a suction and discharge carrier, wherein the suction and discharge carrier is provided with a suction through hole in a penetrating way, and the suction and discharge device is characterized by further comprising a vacuum generator according to any one of claims 1 to 8, and the connecting port is communicated with the suction through hole.
10. The suction device as claimed in claim 9, wherein the suction carrier is provided with a receiving groove for receiving the suction workpiece, and the suction through holes are plural and located at the bottom surface of the receiving groove respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920839801.5U CN210025345U (en) | 2019-06-04 | 2019-06-04 | Suction and discharge device and vacuum generator thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920839801.5U CN210025345U (en) | 2019-06-04 | 2019-06-04 | Suction and discharge device and vacuum generator thereof |
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| CN210025345U true CN210025345U (en) | 2020-02-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110091351A (en) * | 2019-06-04 | 2019-08-06 | 东莞市光轩塑料制品有限公司 | Vacuum device used and its vacuum generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110091351A (en) * | 2019-06-04 | 2019-08-06 | 东莞市光轩塑料制品有限公司 | Vacuum device used and its vacuum generator |
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