Thick film protector for subscriber line of stored program control exchange

Abstract

The utility model relates to the technical field of electrical apparatus elements, in particular to a user line thick film protector of a stored program control exchange, which comprises a substrate, thick film resistors are assembled on the surfaces of the two side edges of the periphery of the substrate, thermistors are assembled on the peripheries of the thick film resistors, a bottom support for supporting is embedded in the surface of the bottom end of the substrate, and the bottom support is connected with the thermistor. Wrap angles for protection are embedded in the surfaces of the two side ends of the top of the base sheet, and supporting rods are integrally constructed between the two wrap angles and between the wrap angles and the bottom support. When the thick film protector is installed, the vertical rod at the bottom of the bottom support can be mutually inserted into the hole preset in the circuit board, and then the position of the bottom support can be conveniently fixed by utilizing the mutual screwing connection between the rotating seat and the vertical rod, so that the bottom support and the wrap angle are mutually matched, and the substrate can be stably connected with the circuit board; and structural components on the periphery of the substrate can operate more stably, and meanwhile, the shock resistance of the thick film protector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical components, in particular to a thick film protector for a user line of a program-controlled exchange. Background Art

[0002] With the rapid development of modern science and technology, the application of programmable switches (PSXs) is becoming increasingly widespread, and the protection of their subscriber lines is becoming increasingly prominent. This requires that the protection circuit be resistant to both secondary lightning strikes (i.e., voltages above 1000V) and mains connection (i.e., 220V AC). Patent No. CN200420085918.2 discloses a thick-film protector for PXX subscriber lines. This design utilizes a large area, double-sided parallel connection, and no resistance adjustment. High resistance precision is achieved through careful selection of resistor paste, strict control of the printing and sintering processes, and strict matching with PCT binning. This ensures the integrity of the thick-film resistors, evenly distributes current across them, and thus increases their power handling and high-voltage resistance. However, because the thick-film protectors used in PXXs utilize only a single support pin for vibration resistance, and the pins are soldered together, the overall stability of the ceramic substrate is poor. Therefore, we propose a thick-film protector for PXX subscriber lines. Utility Model Content

[0003] Aiming at the problems in the prior art, the utility model provides a thick film protector for a user line of a program-controlled exchange.

[0004] The technical solution adopted by the utility model to solve the technical problem is a thick film protector for user lines of a program-controlled exchange, comprising a substrate, thick film resistors are mounted on both sides of the outer periphery of the substrate, and a thermistor is mounted on the outer periphery of the thick film resistor, a bottom bracket for support is embedded on the bottom end surface of the substrate, and angle brackets for protection are embedded on both sides of the top end surface of the substrate, and support rods are integrally constructed between two sets of angle brackets and between the angle brackets and the bottom bracket;

[0005] The bottom end surface of the base is integrally constructed with vertical rods for connection, and there are two groups of vertical rods. The outer periphery of the vertical rods is screwed with a rotating seat for fastening.

[0006] By adopting the above technical solution, when manufacturing the thick-film protector, the base and the two sets of corners can be conveniently embedded in the periphery of the substrate, and multiple sets of support rods are used to form the two sets of corners and the base into a whole, so as to conveniently form a support frame on the periphery of the substrate, thereby facilitating the stability of the subsequent operation of the substrate, allowing the thick-film resistor and thermistor on the surface of the substrate to operate stably, and conveniently protecting the program-controlled switch.

[0007] When installing the thick film protector, the vertical rod at the bottom of the base can be plugged into the preset hole on the circuit board, and then the base and the vertical rod are screwed together to fix the position of the base, so that the base and the wrap angle cooperate with each other, which can make the substrate firmly connected to the circuit board, and make the structural components around the substrate operate more stably, while improving the shock resistance of the thick film protector.

[0008] Specifically, a protective rubber ring is bonded to the top surface of the rotary seat.

[0009] By adopting the above technical solution, the rubber ring has a certain elasticity, which is convenient for reducing the scratch damage caused by friction between the rotary seat and the circuit board.

[0010] Specifically, a silicone ring located on the outer periphery of the vertical rod is bonded to the bottom surface of the base.

[0011] By adopting the above technical solution, the silicone ring is easy to expand and contract, and is convenient for protecting the base and the circuit board when they are attached to each other, thereby reducing the possibility of scratches between the base and the circuit board.

[0012] Specifically, asbestos pads are bonded to the inner peripheral surface of the base and the inner peripheral surface of the corner.

[0013] By adopting the above technical solution, the asbestos pad is easy to protect, thereby reducing the possibility of scratches between the bottom bracket and the corner and the base sheet.

[0014] Specifically, the bottom surface of the substrate is equipped with pins located inside the base, and there are multiple groups of pins.

[0015] By adopting the above technical solution, the pins can be easily connected to the circuits on the circuit board, so that the structural components on the surface of the substrate can be connected to the external circuits and can operate stably.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The technical solution of this application, through the design of the base, corner wraps, support rods, thick-film resistors and thermistors, can facilitate the base and two sets of corner wraps to be embedded in the periphery of the substrate when manufacturing the thick-film protector, and utilize multiple sets of support rods to make the two sets of corner wraps and the base form a whole, so as to facilitate the formation of a support frame on the periphery of the substrate, thereby facilitating the improvement of the stability of the subsequent substrate operation, so that the thick-film resistors and thermistors on the surface of the substrate can operate stably, and conveniently protecting the programmable switch.

[0018] 2. The technical solution of the present application adopts the design of the vertical rod and the rotary seat. When the thick film protector is installed, the vertical rod at the bottom of the base can be plugged into the preset hole on the circuit board. Then, the rotary seat and the vertical rod are screwed together to fix the position of the base, so that the base and the wrap angle cooperate with each other, which can make the substrate firmly connected to the circuit board, and make the structural components on the periphery of the substrate operate more stably, while improving the shock resistance of the thick film protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is an axonometric drawing of the present utility model;

[0021] Figure 2 This is a schematic diagram of the inner structure of the connection between the base and the corner of the present invention;

[0022] Figure 3 This is a schematic diagram of the connection structure between the vertical rod and the rotating seat of the utility model;

[0023] In the figure: 1. Substrate; 2. Thick film resistor; 3. Thermistor; 4. Base; 5. Support rod; 6. Wrap angle; 7. Vertical rod; 8. Rotary seat; 9. Rubber ring; 10. Silicone ring; 11. Asbestos pad; 12. Pin. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] See also Figure 1-3 The embodiment of the utility model provides a technical solution: a thick film protector for a user line of a program-controlled switching system, comprising a substrate 1, thick film resistors 2 are mounted on both side surfaces of the outer periphery of the substrate 1, and a thermistor 3 is mounted on the outer periphery of the thick film resistor 2, a base 4 for support is embedded on the bottom end surface of the substrate 1, and angles 6 for protection are embedded on both side end surfaces of the top of the substrate 1, and support rods 5 are integrally constructed between the two groups of angles 6 and between the angles 6 and the base 4; a vertical rod 7 for connection is integrally constructed on the bottom end surface of the base 4, and there are two groups of vertical rods 7, and a rotary seat 8 for fastening is screwed on the outer periphery of the vertical rod 7.

[0026] During use, when manufacturing the thick film protector, the base 4 and the two sets of angles 6 can be conveniently embedded in the periphery of the substrate 1, and multiple sets of support rods 5 are used to make the two sets of angles 6 and the base 4 form a whole, so as to form a supporting frame on the periphery of the substrate 1, thereby improving the stability of the subsequent operation of the substrate 1, so that the thick film resistor 2 and thermistor 3 on the surface of the substrate 1 can operate stably, and conveniently protect the program-controlled switch;

[0027] When installing the thick film protector, the vertical rod 7 at the bottom of the base 4 can be plugged into the preset hole on the circuit board, and then the rotary seat 8 and the vertical rod 7 are screwed together to fix the position of the base 4, so that the base 4 and the wrap angle 6 cooperate with each other, which can make the substrate 1 firmly connected to the circuit board, and make the structural components on the periphery of the substrate 1 operate more stably, while improving the shock resistance of the thick film protector.

[0028] like Figure 1 、 Figure 2 and Figure 3 As shown, a protective rubber ring 9 is bonded to the top surface of the rotary seat 8 .

[0029] During use, the rubber ring 9 has a certain elasticity, which is convenient for reducing the scratches and damages caused by friction between the rotary seat 8 and the circuit board.

[0030] like Figure 3 As shown, a silicone ring 10 located on the outer periphery of the vertical rod 7 is bonded to the bottom surface of the bottom bracket 4 .

[0031] During use, the silicone ring 10 is easily retractable, so as to provide protection when the base bracket 4 and the circuit board are attached to each other, thereby reducing the possibility of scratches between the base bracket 4 and the circuit board.

[0032] like Figure 1 and Figure 2 As shown, asbestos pads 11 are bonded to the inner circumference of the base 4 and the inner circumference of the corner 6 .

[0033] During use, the asbestos pad 11 provides protection, thereby reducing the possibility of scratches between the base 4 and the corner 6 and the substrate 1.

[0034] like Figure 1 As shown, the bottom surface of the substrate 1 is equipped with pins 12 located inside the base 4, and there are multiple groups of pins 12.

[0035] When in use, the pins 12 are conveniently connected to the circuits on the circuit board, so that the structural components on the surface of the substrate 1 can be connected to the external circuits and can operate stably.

[0036] The working principle and usage process of the present invention are as follows: when in use, first install the corresponding structural components in the appropriate position. When manufacturing the thick film protector used for the program-controlled switch, it is convenient to embed the base 4 and the two sets of angles 6 on the periphery of the substrate 1, and use multiple sets of support rods 5 to make the two sets of angles 6 and the base 4 form a whole, so as to form a support frame on the periphery of the substrate 1, so as to improve the stability of the subsequent operation of the substrate 1, so that the thick film resistor 2 and thermistor 3 on the surface of the substrate 1 can operate stably, and it is convenient to protect the program-controlled switch. At the same time, when installing the thick film protector, the vertical rod 7 at the bottom of the base 4 can be plugged into the preset hole on the circuit board, and then the rotary seat 8 and the vertical rod 7 are screwed together to fix the position of the base 4, so that the base 4 and the angles 6 cooperate with each other, which can make the substrate 1 firmly connected to the circuit board, and make the structural components on the periphery of the substrate 1 operate more stably, and at the same time improve the shock resistance of the thick film protector.

[0037] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A thick film protector for a program-controlled switch subscriber line, characterized in that: The invention comprises a substrate (1), wherein both sides of the outer periphery of the substrate (1) are equipped with thick film resistors (2), and the outer periphery of the thick film resistors (2) is equipped with a thermistor (3), the bottom end surface of the substrate (1) is embedded with a base (4) for support, and both sides of the top end surface of the substrate (1) are embedded with wrapping angles (6) for protection, and support rods (5) are integrally constructed between two groups of the wrapping angles (6) and between the wrapping angles (6) and the base (4); The bottom surface of the base (4) is integrally constructed with a vertical rod (7) that can be used for connection, and there are two groups of vertical rods (7). The outer periphery of the vertical rod (7) is screwed with a rotating seat (8) that can be used for fastening.

2. A thick film protector for a program-controlled switch subscriber line according to claim 1, characterized in that: A protective rubber ring (9) is bonded to the top surface of the rotary seat (8).

3. A thick film protector for a program-controlled switch subscriber line according to claim 1, characterized in that: A silicone ring (10) located on the outer periphery of the vertical rod (7) is bonded to the bottom surface of the base (4).

4. A thick film protector for a program-controlled exchange subscriber line according to claim 1, characterized in that: Asbestos pads (11) are bonded to the inner peripheral surface of the base support (4) and the inner peripheral surface of the corner wrap (6).

5. A thick film protector for a program-controlled exchange subscriber line according to claim 1, characterized in that: The bottom surface of the substrate (1) is equipped with pins (12) located inside the bottom bracket (4), and there are multiple groups of pins (12).

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