A circuit connection structure and a mass spectrometer having the same

Abstract

The present invention relates to a mass spectrometer, and particularly to a circuit connection structure and a mass spectrometer having the structure, including a partition and a circuit board. An installation opening is formed in the partition, the circuit board is installed on the partition and covers the installation opening, a sealing ring is installed between the circuit board and the partition, and connection lines or connectors are provided on both the inner surface and the outer surface of the circuit board. In the present invention, since connection lines or connectors are provided on both the inner surface and the outer surface of the circuit board, electrical connection can be achieved between the inside and the outside of the cavity through the circuit board; since the installation opening is sealed by the circuit board and the sealing ring, the cost is relatively low; since the contact surface between the circuit board and the partition is relatively large, the sealing difficulty is small and the sealing performance is good.

Description

Technical Field

[0001] The present invention relates to a mass spectrometer, and more particularly to a circuit connection structure and a mass spectrometer having the same structure. Background Art

[0002] When a cable enters a sealed cavity, an opening needs to be made on the outer shell of the cavity. To ensure the sealing performance of the cavity, various sealing means are adopted, including gaskets, sealants, etc.

[0003] A mass spectrometer has a vacuum chamber. When a cable enters the vacuum chamber, it is more difficult to ensure the sealing performance at the opening on the outer shell of the vacuum chamber. The current technical means is to use a special vacuum cable connector to prevent air leakage, but the vacuum cable connector is expensive and difficult to install. Summary of the Invention

[0004] The present invention provides a circuit connection structure and a mass spectrometer having the same structure to ensure the sealing performance of a sealed cavity or a vacuum chamber, and to solve the problems of high cost and difficult installation of vacuum cable connectors.

[0005] To solve the above technical problems, the present invention adopts the following technical means:

[0006] A circuit board connection structure includes a partition board and a circuit board. An installation opening is provided on the partition board, and the circuit board is installed on the partition board to cover the installation opening. A sealing ring is installed between the circuit board and the partition board. Connecting wires or connectors are provided on both the inner surface and the outer surface of the circuit board. Here, the inner surface of the circuit board refers to the surface facing the installation opening of the partition board, and the outer surface refers to the surface facing away from the installation opening of the partition board.

[0007] It further includes a pressing plate, which is installed on the partition board, and the circuit board is clamped between the partition board and the pressing plate.

[0008] A sealing ring is installed between the circuit board and the pressing plate.

[0009] The circuit board is provided with vent holes.

[0010] The circuit board is fixedly connected to the partition board and the pressing plate with screws, and the screws are located outside the sealing ring.

[0011] Installation holes are provided on the partition board, the circuit board, and the pressing plate, and the screws pass through the installation holes to fix the circuit board and the pressing plate on the partition board.

[0012] A first avoidance groove is provided on the surface of the partition board, and the first avoidance groove is covered by the circuit board.

[0013] A second avoidance groove is provided on the surface of the pressing plate, and the second avoidance groove is covered by the circuit board.

[0014] The coverage mentioned here includes two cases: being completely covered by the circuit board and being only partially covered by the circuit board.

[0015] A mass spectrometer includes a vacuum chamber, and the above-mentioned circuit board connection structure is provided on the vacuum chamber.

[0016] The technical effects achieved by the present invention are as follows: (1) Since both the inner surface and the outer surface of the circuit board have connection lines or connectors, electrical connection can be achieved between the inside and the outside of the cavity through the circuit board; since the circuit board and the sealing ring are used to seal the installation port, the cost is relatively low; since the contact surface between the circuit board and the partition is relatively large, the sealing difficulty is small and the sealing performance is good; therefore, the present invention ensures the sealing performance of the sealed chamber or the vacuum chamber, and solves the problems of high cost and difficult installation of vacuum cable connectors. (2) The pressing plate ensures that the circuit board can be stably installed on the partition, and can press the sealing ring tightly. The pressing plate also ensures that the circuit board can be uniformly stressed to improve the service life of the circuit board; the sealing ring ensures the sealing performance between the circuit board and the partition. (3) Installing a sealing ring between the circuit board and the pressing plate can further improve the sealing performance. If the circuit board itself leaks air, the two sealing rings can ensure the sealing performance of the cavity. (4) Since there are ventilation holes on the circuit board, the air pressures on both sides of the circuit board are the same, avoiding the circuit board from bearing forces due to the pressure difference, and can extend the service life of the circuit board. (5) The ventilation holes on the circuit board will not affect the normal use of the circuit board, and the process holes or through holes for electricity on the circuit board can also be used as ventilation holes directly without additional processes. (6) Since the connectors or wires on the circuit board will pass through the circuit board and extend to the other side of the circuit board during welding, the avoidance groove provides space to avoid the above phenomenon from affecting the sealing. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the invention;

[0018] Figure 2 is Figure 1 the front view of

[0019] Figure 3 is Figure 2 the C-C sectional view of

[0020] Figure 4 is Figure 3 the partial enlarged view of

[0021] The reference numerals in the figure respectively represent: partition 1, circuit board 2, pressing plate 3, installation port 4, sealing ring 5, screw 6, first avoidance groove 7, second avoidance groove 8, connector 9, vacuum chamber 10. Detailed Embodiments

[0022] As Figure 1 、 Figure 2, Figure 3 As shown in the figure, a circuit board connection structure includes a partition 1, a circuit board 2, and a pressing plate 3. An installation opening 4 is provided on the partition 1. The circuit board 2 is installed on the partition 1 and covers the installation opening 4. The pressing plate 3 is installed on the partition 1, and the circuit board 2 is clamped between the partition 1 and the pressing plate 3. A sealing ring 5 is installed between the circuit board 2 and the partition 1.

[0023] The pressing plate 3 ensures that the circuit board 2 can be stably installed on the partition, and can press the sealing ring 5 tightly. The pressing plate 3 also ensures that the circuit board 2 can be evenly stressed to improve the service life of the circuit board 2; the sealing ring 5 ensures the sealing between the circuit board 2 and the partition 1.

[0024] A sealing ring 5 is installed between the circuit board 2 and the pressing plate 3. Installing a sealing ring 5 between the circuit board 2 and the pressing plate 3 can further improve the sealing performance. If the circuit board 2 leaks air itself, the two sealing rings 5 can ensure the sealing.

[0025] The circuit board 2 has ventilation holes. Since the circuit board 2 has ventilation holes, the air pressures on both sides of the circuit board 2 are the same, avoiding the circuit board 2 from bearing force due to the pressure difference, and can extend the service life of the circuit board 2. The ventilation holes on the circuit board 2 will not affect the normal use of the circuit board 2, and the process holes or through holes on the circuit board 2 can also be directly used as ventilation holes without additional processes.

[0026] The circuit board 2 is fixedly connected to the partition 1 and the pressing plate 3 with screws 6. The screws 6 are located outside the sealing ring 5.

[0027] Installation holes are provided on the partition 1, the circuit board 2, and the pressing plate 3. The screws 6 pass through the installation holes to fix the circuit board 2 and the pressing plate 3 on the partition 1. The screws 6 located outside the sealing ring 5 will not affect the sealing effect.

[0028] A first avoidance groove 7 is provided on the surface of the partition 1, and the first avoidance groove 7 is covered by the circuit board 2. The coverage mentioned here includes two cases: being completely covered by the circuit board and being only partially covered by the circuit board.

[0029] A second avoidance groove 8 is provided on the surface of the pressing plate 3, and the second avoidance groove 8 is covered by the circuit board 2.

[0030] Since the connectors 9 or wires on the circuit board 2 will pass through the circuit board 2 and extend to the other side of the circuit board 2 during welding, the avoidance grooves leave space to avoid the above phenomena from affecting the sealing.

[0031] Both the inner surface and the outer surface of the circuit board 2 have connection lines or connectors 9. The inner surface of the circuit board mentioned here refers to the surface facing the installation opening of the partition, and the outer surface refers to the surface facing away from the installation opening of the partition.

[0032] A mass spectrometer includes a vacuum chamber 10, and the vacuum chamber 10 is provided with the above-mentioned circuit board connection structure.

[0033] The principle of the present invention is that when a cable enters a sealed cavity, an opening needs to be made on the outer shell of the cavity, that is, the mounting opening provided on the partition board of the present invention; the mounting opening is sealed by a circuit board. Since both the inner surface and the outer surface of the circuit board have connection lines or connectors, the inside and the outside of the cavity can be electrically connected through the circuit board. Since the contact surface between the circuit board and the partition board is relatively large, the sealing difficulty is small and the sealing performance is good. At the same time, the cost of the circuit board is relatively low. Therefore, the present invention ensures the sealing performance of the sealed cavity or the vacuum chamber, and solves the problems of high cost and difficult installation of vacuum cable connectors.

[0034] In addition, when a large number of connection lines are required, if existing vacuum connectors are used for connection, it is possible that all the connection lines cannot pass through the vacuum connectors, and the internal connection lines of the vacuum chamber will be very messy, and even interfere with other moving structures in the vacuum chamber, affecting the layout of the structure.

[0035] Since the present invention uses a circuit board to connect the circuits inside and outside the vacuum chamber, the inside of the vacuum chamber can directly use connectors to plug into the circuit board, or directly connect to a flexible cable board. This connection method and layout method enable a large number of connection lines to be connected to the circuit board, simplifying the structural layout inside the vacuum chamber.

Claims

1. A circuit connection structure, characterized in that: it includes a partition board and a circuit board. An installation opening is provided on the partition board, the circuit board is installed on the partition board and covers the installation opening, a sealing ring is installed between the circuit board and the partition board, and connection lines or connectors are provided on both the inner surface and the outer surface of the circuit board; it further includes a pressing plate, the pressing plate is installed on the partition board, and the circuit board is clamped between the partition board and the pressing plate; a sealing ring is installed between the circuit board and the pressing plate; the circuit board has ventilation holes; the ventilation holes are process holes or current-carrying holes on the circuit board.

2. The circuit connection structure according to claim 1, characterized in that: the circuit board and the partition board, and the circuit board and the pressing plate are fixedly connected by screws, and the screws are located outside the sealing ring.

3. The circuit connection structure according to claim 2, characterized in that: installation holes are provided on the partition board, the circuit board and the pressing plate, and the circuit board and the pressing plate are fixed on the partition board by screws passing through the installation holes.

4. The circuit connection structure according to claim 1 or 2 or 3, characterized in that: a first avoidance groove is provided on the surface of the partition board, and the first avoidance groove is covered by the circuit board.

5. The circuit connection structure according to claim 1 or 2 or 3, characterized in that: a second avoidance groove is provided on the surface of the pressing plate, and the second avoidance groove is covered by the circuit board.

6. A mass spectrometer, including a vacuum chamber, characterized in that: the vacuum chamber has the circuit connection structure according to any one of claims 1-5.

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