Vibration-resistant surface-mounted capacitor

Abstract

The utility model discloses a surface-mounted capacitor resistant to vibration. Comprising a capacitor body and a base arranged at the bottom of the capacitor body. The capacitor body comprises a bottom-sealed cylindrical shell and a capacitor core; a rubber plug with a boss seal is arranged between the capacitor body and the base; a plurality of tapered recesses are formed on the outer peripheral surface of the housing, the radial depth of each tapered recess being reduced from the bottom surface of the bottom-sealed cylindrical shape toward the opening side, and a tapered protrusion protruding toward the radial center side is formed on the inner peripheral surface of the back surface of each recess. According to the utility model, the capacitor body and the capacitor base are relatively fixed and synchronously vibrated, so that the surface-mounted capacitor is more stable and reliable in structure, and electrode leads are prevented from being broken and unsoldered. And the working condition of the surface-mounted capacitor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitors, in particular to a vibration-resistant chip capacitor. Background Art

[0002] Capacitors are electronic devices used to store and release electric charges. They are widely used in the intelligent electronics industry, electromechanical industry, communications industry, automotive applications and other industries. New energy vehicles are now a very popular application direction for capacitors. The basic functions of capacitors help build the core electronic control system of new energy vehicles. From the perspective of the whole vehicle, the capacitors of the electronic system on the car not only enhance the performance of the car, but also help to ensure the service life of the car. Systematization, integrated integration and intelligence are also the inevitable direction of the development of the automotive industry. At present, from a general point of view, the cost of the electronic system on the car accounts for 25%-30% of the cost of the whole vehicle, and the on-board electronic components will account for 40% of the cost of the whole vehicle. Due to the special use environment of on-board electronics, the engine ignition device, airbag control device, etc. have high requirements for the vibration resistance of capacitors. Not only in automotive electronic systems but also in other electrical equipment, the environment in which capacitors are used is diversifying. Therefore, capacitors with high mechanical strength and excellent vibration resistance are also strongly required for use in electrical equipment. Among all common electronic devices, capacitors are usually the most susceptible to damage from vibration. Capacitors can be tall and small in diameter to reduce the footprint. Typical through-hole lead types have relatively poor vibration resistance. At present, ordinary electrolytic capacitors are sealed by placing the core into the rolled groove of the aluminum shell. This groove mainly serves to fix the sealing body. The capacitor core is easy to shake when the capacitor is in a vibrating environment. When this type of capacitor is used in a vibrating environment, there are hidden dangers of open circuit and short circuit of the positive and negative poles. During the use of ordinary capacitors, the electrolyte gradually dissipates, the internal capacitor core will shrink, and the gap between the capacitor core and the aluminum shell will become larger. After long-term use, the internal capacitor core may shake. At present, the capacitor industry mostly uses glue filling inside the capacitor aluminum shell to achieve the vibration resistance of the capacitor, but glue filling will affect the heat dissipation of the capacitor and affect the service life. The amount of glue filling is not easy to control, and the colloid may also react chemically with the electrolyte.

[0003] Therefore, it is necessary to provide a vibration-resistant chip capacitor for use. Utility Model Content

[0004] The utility model aims to provide a vibration-resistant chip capacitor to solve the problem that the chip capacitor can, at least to a certain extent, make the capacitor body and the base relatively fixed and vibrate synchronously.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vibration-resistant chip capacitor, comprising a capacitor body and a base arranged at the bottom of the capacitor body;

[0006] The capacitor body comprises a bottom-sealed cylindrical shell and a capacitor core; a rubber plug with a boss seal is provided between the capacitor body and the base;

[0007] The outer peripheral surface of the housing forms a plurality of tapered recesses whose radial depth decreases from the bottom surface of the bottom-sealed cylindrical shape toward the opening side, and the inner peripheral surface of the back surface of the recess forms a tapered protrusion that protrudes toward the radial center side.

[0008] According to a further technical solution, two electrode leads are provided at the rubber plug at the bottom of the capacitor body, and threading holes are provided on the rubber plug for the two electrode leads to pass through.

[0009] A further technical solution is that two lead-out holes are symmetrically provided in the middle of the base, and two lead grooves are provided at the bottom of the base. One end of the lead groove is connected to the lead-out hole, and the other end of the lead groove is connected to the outer edge of the base. The electrode leads pass through the lead-out hole and the lead groove respectively, and two auxiliary pads are fixed in the base and are respectively located on the two electrode sides.

[0010] According to a further technical solution, a boss is fixedly provided on the upper portion of the base, and the boss is located around the capacitor body.

[0011] According to a further technical solution, glue is poured between the recessed portion of the shell and the raised portion of the base to connect the shell and the base.

[0012] Beneficial effects of the utility model:

[0013] The utility model makes the capacitor body and the base relatively fixed and vibrate synchronously, making the structure of the chip capacitor more stable and reliable, which is conducive to avoiding the breakage and desoldering of the electrode lead and improving the working condition of the chip capacitor. Thus, the vibration resistance of the capacitor is improved, the damage of the terminal parts is prevented, and the working stability of the capacitor is achieved.

[0014] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : A three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 : A top view of the utility model.

[0017] Figure 3 :for Figure 2 Sectional view along line AA.

[0018] Figure 4 : A schematic diagram of the three-dimensional structure of the base in the utility model.

[0019] Figure 5 : A front view of a circular tensile hole in the auxiliary pad of the utility model.

[0020] Figure 6 : A cross-sectional view of a circular tensile hole in the auxiliary pad of the utility model.

[0021] Figure 7 : A front view of an oblong tensile hole in the auxiliary pad of the utility model.

[0022] Figure 8 : A cross-sectional view of an oblong tensile hole in the auxiliary pad of the utility model.

[0023] Fig. 9 : The rear view of the base in the utility model.

[0024] Fig.10 : A schematic diagram of the three-dimensional structure of the rubber plug in the utility model.

[0025] Fig.11 : A cross-sectional view of the rubber stopper in the utility model.

[0026] Fig.12 : The utility model has four concave parts when gluing.

[0027] Fig.13 : The utility model has six concave parts when gluing.

[0028] Fig.14 : The utility model has eight concave parts when gluing.

[0029] Reference numerals:

[0030] 1-capacitor body; 2-base; 3-housing; 4-capacitor core; 5-rubber plug; 6-recess; 7-conical protrusion; 8-electrode lead; 9-threading hole; 10-lead-out hole; 11-lead groove; 12-auxiliary pad; 13-boss; 14-circular tensile hole; 15-oblong tensile hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] Please refer to Figure 1-14 As shown; a vibration-resistant chip capacitor, comprising a capacitor body 1 and a base 2 arranged at the bottom of the capacitor body 1;

[0033] The capacitor body 1 includes a bottom-sealed cylindrical shell 3 and a capacitor core 4. A rubber plug 5 with a boss seal is provided between the capacitor body 1 and the base 2. The rubber plug 5 is used to seal the opening of the shell 3. At the same time, the rubber plug 5 can absorb external vibration force, reduce the harm to the capacitor body 1 during vibration, and improve the vibration resistance of the capacitor.

[0034] Reference Figure 1 As shown, the outer peripheral surface of the shell 3 forms a plurality of conical recesses 6 whose radial depth becomes shallower from the bottom surface of the bottom-sealed cylinder toward the opening side, and the inner peripheral surface of the back side of the recess 6 forms a conical protrusion 7 that bulges toward the radial center side; and the protrusion is used to abut and support the capacitor core 4 to prevent the capacitor core 4 from vibrating in the aluminum shell.

[0035] In this embodiment, refer to Figure 3 As shown, two electrode leads 8 are provided at the rubber plug 5 at the bottom of the capacitor body 1 , and threading holes 9 are provided on the rubber plug 5 for the two electrode leads 8 to pass through.

[0036] In this embodiment, refer to Figure 4 As shown, two lead holes 10 are symmetrically provided in the middle of the base 2, and two lead grooves 11 are provided at the bottom of the base 2. One end of the lead groove 11 is connected to the lead hole 10, and the other end of the lead groove 11 is connected to the outer edge of the base 2. The electrode lead 8 passes through the lead hole 10 and the lead groove 11 respectively. Two auxiliary pads 12 are fixed in the base 2 and are respectively located on the sides of the two electrode leads 8 to increase the vibration resistance of the chip capacitor.

[0037] The tension holes on the auxiliary pad 12 are provided with two shapes; namely, a circular tension hole 14 (refer to Figure 5 and Figure 6 As shown) and open oblong tensile holes 15 (refer to Figure 7 and Figure 8 shown).

[0038] In this embodiment, refer to Figure 4 As shown, a boss 13 is fixedly provided on the upper portion of the base 2 , and the boss 13 is located around the capacitor body 1 ; the boss 13 is high enough to cover the recess 6 of the upper shell 3 of the capacitor body 1 .

[0039] In this embodiment, glue is poured between the recessed portion 6 of the housing 3 and the boss 13 of the base 2 to connect the housing 3 and the base 2;

[0040] The recessed portions 6 on the housing 3 can be distributed in a variety of shapes when in use, and can be divided into:

[0041] When there are four recesses 6, glue is applied between the housing 3 and the base 2 (refer to Fig.12 shown);

[0042] When there are six recesses 6, glue is applied between the housing 3 and the base 2 (refer to Fig.13 shown);

[0043] When there are eight recesses 6, glue is applied between the housing 3 and the base 2 (refer to Fig.14 shown);

[0044] The utility model makes the capacitor body 1 and the base 2 relatively fixed and vibrate synchronously, making the structure of the chip capacitor more stable and reliable, which is conducive to avoiding the breakage and desoldering of the electrode lead 8. The working condition of the chip capacitor is improved. Therefore, the vibration resistance of the capacitor is improved, the damage of the terminal components is prevented, and the working stability of the capacitor is achieved.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vibration-resistant chip capacitor, characterized in that: It comprises a capacitor body (1) and a base (2) arranged at the bottom of the capacitor body (1); The capacitor body (1) comprises a bottom-sealed cylindrical shell (3) and a capacitor core (4); a rubber plug (5) with a boss seal is provided between the capacitor body (1) and the base (2); The outer peripheral surface of the housing (3) forms a plurality of tapered recesses (6) whose radial depth decreases from the bottom surface of the bottom-sealed cylindrical shape toward the opening side, and the inner peripheral surface of the back side of the recess (6) forms a tapered protrusion (7) that protrudes toward the radial center side.

2. A vibration-resistant chip capacitor according to claim 1, characterized in that: Two electrode leads (8) are provided at the rubber plug (5) at the bottom of the capacitor body (1), and threading holes (9) are provided on the rubber plug (5) for the two electrode leads (8) to pass through.

3. A vibration-resistant chip capacitor according to claim 2, characterized in that: Two lead holes (10) are symmetrically arranged in the middle of the base (2), and two lead grooves (11) are arranged at the bottom of the base (2), one end of the lead groove (11) is connected to the lead hole (10), and the other end of the lead groove (11) is connected to the outer edge of the base (2), and the electrode lead wires (8) pass through the lead hole (10) and the lead groove (11) respectively, and two auxiliary pads (12) are fixedly arranged in the base (2) and are respectively located on the sides of the two electrode leads (8).

4. The vibration-resistant chip capacitor according to claim 1, characterized in that: A boss (13) is also fixedly provided on the upper part of the base (2), and the boss (13) is located around the capacitor body (1).

5. The vibration-resistant chip capacitor according to claim 1, characterized in that: Glue is poured between the recessed portion (6) of the shell (3) and the raised platform (13) of the base (2), and the shell (3) and the base (2) are connected.

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