Junction box circuit structure for aspirator

Abstract

The utility model relates to a junction box circuit structure for an aspirator. Comprising a first common-mode inductor, a second common-mode inductor, a third common-mode inductor, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a step-down chip used for converting 12V direct-current voltage into 5V direct-current voltage, a first interface used for being connected with a suction tube, a second interface used for being connected with an aspirator host and a third interface used for being connected with an auxiliary display screen. The device is connected with the suction tube, the aspirator main machine and the auxiliary display screen at the same time, compactness is good, cost is low, common-mode current can be effectively restrained, and reliability and stability of signal transmission can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of the wiring box circuit structure for a suction apparatus, in particular to a wiring box circuit structure for a suction apparatus. Background Art

[0002] Terminating pregnancy within three months of gestation by artificial or drug methods is called early pregnancy termination, also known as induced abortion, which is used as a remedial measure for contraceptive failure and accidental pregnancy, and also for those who are not suitable to continue pregnancy due to diseases and need to terminate pregnancy to prevent congenital malformations or genetic diseases. The commonly used methods include vacuum aspiration abortion, forceps extraction abortion, and medical abortion.

[0003] Vacuum aspiration abortion is applicable to those within ten weeks of pregnancy. The suction tube of the abortion suction apparatus can be inserted into the uterine cavity, and the embryonic tissue is sucked out under negative pressure to terminate pregnancy. After the operation, the sucked tissue needs to be filtered with a filter, the blood loss is measured, and it is carefully checked whether there are villi and the number of villi in the tissue.

[0004] The existing suction apparatus includes a main display host, a suction tube, and a secondary display. The host and the suction tube are connected through a wiring box, and the secondary display and the host are connected through another wiring box. Thus, two wiring boxes are required for connection, resulting in high cost and large space occupation.

[0005] Therefore, in this patent application of the utility model, the applicant has carefully studied a wiring box circuit structure for a suction apparatus to solve the above problems. Summary of the Utility Model

[0006] Aiming at the deficiencies of the above-mentioned existing technology, the main purpose of the utility model is to provide a wiring box circuit structure for a suction apparatus, which simultaneously connects the suction tube, the suction apparatus host, and the secondary display, has good compactness, low cost, and can effectively suppress common-mode current, which is beneficial to ensuring the reliability and stability of signal transmission.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A wiring box circuit structure for a suction apparatus includes a first common-mode inductor, a second common-mode inductor, a third common-mode inductor, capacitor C1, capacitor C2, capacitor C3, capacitor C4, a buck chip for converting 12V DC voltage into 5V DC voltage, a first interface for connecting the suction tube, a second interface for connecting the suction apparatus host, and a third interface for connecting the secondary display;

[0009] Pin 3 of the step-down chip and pin 4 of the third interface are both used to connect to a 12V DC voltage. Pin 1 of the step-down chip is grounded. Pin 2 of the step-down chip is grounded through capacitor C3, and capacitor C4 is in parallel with capacitor C3. Pin 3 of the step-down chip is grounded through capacitor C2, and capacitor C1 is in parallel with capacitor C2;

[0010] The first end of the first winding of the first common-mode inductor is connected to pin 2 of the step-down chip. The second end of the first winding of the first common-mode inductor is connected to the first end of the first winding of the second common-mode inductor. The first end of the second winding of the first common-mode inductor is grounded. The first end of the first winding of the third common-mode inductor is connected to the first end of the second winding of the first common-mode inductor. The second end of the second winding of the first common-mode inductor is connected to the first end of the second winding of the second common-mode inductor;

[0011] The second end of the first winding of the second common-mode inductor is connected to pin 1 of the first interface. The second end of the second winding of the second common-mode inductor and the first end of the second winding of the third common-mode inductor are both connected to pin 2 of the first interface. The second end of the second winding of the third common-mode inductor is connected to pin 3 of the first interface. Pin 1 of the second interface and pin 2 of the third interface are both connected to the first end of the second winding of the third common-mode inductor. Pin 2 of the second interface is grounded. Pin 1 and pin 3 of the third interface are both grounded.

[0012] As a preferred solution, pin 3 of the step-down chip and pin 4 of the third interface are both connected to the 12V DC voltage through a first bead.

[0013] As a preferred solution, the second end of the first winding of the second common-mode inductor is connected to pin 1 of the first interface through a second bead.

[0014] As a preferred solution, it further includes a fuse F1. The second end of the first winding of the second common-mode inductor is connected to pin 1 of the first interface through a second bead and the fuse F1.

[0015] As a preferred solution, the second end of the second winding of the second common-mode inductor and the first end of the second winding of the third common-mode inductor are both connected to pin 2 of the first interface through a third bead.

[0016] As a preferred solution, the second end of the second winding of the third common-mode inductor is connected to pin 3 of the first interface through a fourth bead.

[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, the overall circuit structure is ingeniously and reasonably designed. Only three interfaces of a junction box are needed to connect the suction tube, the suction device main unit, and the secondary display screen at the same time. It has good compactness and low cost. Moreover, through multiple common-mode inductors, the common-mode current can be effectively suppressed, which is beneficial to ensuring the reliability and stability of signal transmission;

[0018] Secondly, multiple beads are used for interference suppression, so that the beads can suppress high-frequency noise and spike interference, improving the filtering effect.

[0019] To more clearly elaborate on the structural features and functions of the present invention, the following will be described in detail in conjunction with the drawings and specific embodiments. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the structure of the suction device according to the embodiment of the present utility model;

[0021] Figure 2 is the circuit schematic diagram of the embodiment of the present utility model.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 11. Suction device main unit

[0024] 12. Suction tube

[0025] 13. Main display screen

[0026] 14. Secondary display screen. Detailed Embodiment

[0027] The following will further describe the present utility model in conjunction with the drawings and specific embodiments.

[0028] As Figure 1 and Figure 2 shown, a circuit structure of a junction box for a suction device is provided inside the junction box, which includes a first common-mode inductor (such as the common-mode inductor LL1 in Figure 2 ), a second common-mode inductor (such as the common-mode inductor LL2 in Figure 2 ), a third common-mode inductor (such as the common-mode inductor LL4 in Figure 2 ), capacitors C1, C2, C3, C4, a buck chip for converting 12V DC voltage into 5V DC voltage (such as the chip U1 in Figure 2 ), a first interface for connecting the suction tube 12 (such as the interface P1 in Figure 2 ), a second interface for connecting the suction device main unit 11 (such as the interface P2 in Figure 2 ), and a third interface for connecting the secondary display screen 14 (such as the interface P3 in Figure 2The interface P3 therein).

[0029] In this embodiment, as Figure 1 shown, it shows a schematic structural diagram of the aspirator. The aspirator includes an aspirator main unit 11, an aspiration tube 12, a junction box, a main display screen 13 for connecting to the aspirator main unit 11, and a secondary display screen 14 rotatably connected to the main display screen 13. The aspiration tube 12 is respectively connected to the aspirator main unit 11, the secondary display screen 14, and a 12V DC voltage through the junction box.

[0030] As Figure 2 shown, the pin 3 of the buck chip and the pin 4 of the third interface are both used to connect a 12V DC voltage. In this embodiment, the pin 3 of the buck chip and the pin 4 of the third interface are both connected to the 12V DC voltage through a first magnetic bead (such as Figure 2 the magnetic bead B1 therein).

[0031] The pin 1 of the buck chip is grounded, the pin 2 of the buck chip is grounded through a capacitor C3, the capacitor C4 is in parallel with the capacitor C3, the pin 3 of the buck chip is grounded through a capacitor C2, and the capacitor C1 is in parallel with the capacitor C2;

[0032] The first end of the first winding of the first common mode inductor is connected to the pin 2 of the buck chip, the second end of the first winding of the first common mode inductor is connected to the first end of the first winding of the second common mode inductor, the first end of the second winding of the first common mode inductor is grounded, the first end of the first winding of the third common mode inductor is connected to the first end of the second winding of the first common mode inductor, and the second end of the second winding of the first common mode inductor is connected to the first end of the second winding of the second common mode inductor. The first common mode inductor and the second common mode inductor are connected in series, which can effectively suppress the common mode interference signal.

[0033] The second end of the first winding of the second common mode inductor is connected to the pin 1 of the first interface. Preferably, the second end of the first winding of the second common mode inductor is connected to the pin 1 of the first interface through a second magnetic bead (such as Figure 2 the magnetic bead B2 therein). In this embodiment, a fuse F1 is further included, and the second end of the first winding of the second common mode inductor is connected to the pin 1 of the first interface through the second magnetic bead and the fuse F1.

[0034] The second end of the second winding of the second common mode inductor and the second end of the first winding of the third common mode inductor are both connected to the pin 2 of the first interface. In this embodiment, the second end of the second winding of the second common mode inductor and the second end of the first winding of the third common mode inductor are both connected to the pin 2 of the first interface through a third magnetic bead (such as Figure 2 the magnetic bead B3 therein).

[0035] The second end of the second winding of the third common-mode inductor is connected to pin 3 of the first interface. In this embodiment, the second end of the second winding of the third common-mode inductor is connected to pin 3 of the first interface through a fourth bead (such as Figure 2 the bead B4 in

[0036] Pin 1 of the second interface and pin 2 of the third interface are both connected to the first end of the second winding of the third common-mode inductor. Pin 2 of the second interface is grounded, and pins 1 and 3 of the third interface are both grounded.

[0037] The design key point of the present utility model is that its overall circuit structure is ingenious and reasonable. Only three interfaces of a junction box are needed to connect the suction tube, the suction unit host, and the secondary display screen at the same time, with good compactness and low cost. Moreover, through multiple common-mode inductors, the common-mode current can be effectively suppressed, which is beneficial to ensuring the reliability and stability of signal transmission;

[0038] Secondly, interference suppression is carried out through multiple beads, so that the beads can suppress high-frequency noise and spike interference, improving the filtering effect.

[0039] The above is only a preferred embodiment of the present utility model, and does not limit the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes, and modifications made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A wiring box circuit structure for a suction device, characterized in that: It includes a first common-mode inductor, a second common-mode inductor, a third common-mode inductor, capacitor C1, capacitor C2, capacitor C3, capacitor C4, a buck chip for converting 12V DC voltage into 5V DC voltage, a first interface for connecting the suction tube, a second interface for connecting the suction host, and a third interface for connecting the secondary display screen; Pin 3 of the buck chip and pin 4 of the third interface are both used to connect the 12V DC voltage. Pin 1 of the buck chip is grounded. Pin 2 of the buck chip is grounded through capacitor C3. Capacitor C4 is in parallel with capacitor C3. Pin 3 of the buck chip is grounded through capacitor C2. Capacitor C1 is in parallel with capacitor C2; The first end of the first winding of the first common-mode inductor is connected to pin 2 of the buck chip. The second end of the first winding of the first common-mode inductor is connected to the first end of the first winding of the second common-mode inductor. The first end of the second winding of the first common-mode inductor is grounded. The first end of the first winding of the third common-mode inductor is connected to the first end of the second winding of the first common-mode inductor. The second end of the second winding of the first common-mode inductor is connected to the first end of the second winding of the second common-mode inductor; The second end of the first winding of the second common-mode inductor is connected to pin 1 of the first interface. The second end of the second winding of the second common-mode inductor and the first end of the second winding of the third common-mode inductor are both connected to pin 2 of the first interface. The second end of the second winding of the third common-mode inductor is connected to pin 3 of the first interface. Pin 1 of the second interface and pin 2 of the third interface are both connected to the first end of the second winding of the third common-mode inductor. Pin 2 of the second interface is grounded. Pin 1 and pin 3 of the third interface are both grounded.

2. The wiring box circuit structure for a suction device according to claim 1, characterized in that: Pin 3 of the buck chip and pin 4 of the third interface are both connected to the 12V DC voltage through a first bead.

3. The wiring box circuit structure for a suction device according to claim 1, characterized in that: The second end of the first winding of the second common-mode inductor is connected to pin 1 of the first interface through a second bead.

4. The wiring box circuit structure for a suction device according to claim 3, characterized in that: It further includes a fuse F1. The second end of the first winding of the second common-mode inductor is connected to pin 1 of the first interface through a second bead and the fuse F1.

5. The wiring box circuit structure for a suction device according to claim 1, characterized in that: The second end of the second winding of the second common-mode inductor and the first end of the second winding of the third common-mode inductor are both connected to pin 2 of the first interface through a third bead.

6. The wiring box circuit structure for a suction device according to claim 1, characterized in that: The second end of the second winding of the third common-mode inductor is connected to pin 3 of the first interface through a fourth bead.

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