Precise resistor

Abstract

The utility model relates to the technical field of electronic components, in particular to a precision resistor which comprises a resistor body, a packaging body is arranged outside the resistor body and comprises a shell, a sealing end cover is arranged at one end of the shell, an insertion cavity is arranged in the shell, and a sealing cover is arranged at the other end of the shell. The plug-in chamber is internally provided with a positioning module used for plug-in mounting of the resistor body, the positioning module is installed in the packaging body, the resistor body is fixed during packaging, meanwhile, the anti-falling effect can be achieved during plug-in mounting of the male head and the female head, and the stability of the whole resistor in the using process is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a precision resistor. Background Art

[0002] Packaged resistors, by covering the outside of the electrical components with a protective shell made of PPT material, can act as a filter when in use, reduce interference from other components, and also facilitate the connection of the male and female heads of the resistor.

[0003] Chinese Patent (Application No.: 2017113809982) A ceramic thin film glass encapsulated resistor, the ceramic thin film glass encapsulated resistor includes a resistor chip, a glass shell, a ceramic thin sheet and two electrode leads, the glass shell is sleeved outside the resistor chip, and an opening is provided at the bottom; the ceramic thin sheet seals the opening of the glass shell and is fixed to the glass shell, and is provided with two lead holes; one end of the two electrode leads is respectively connected to the electrodes at both ends of the resistor chip, and the other end passes through the two lead holes of the ceramic thin sheet. The present invention also relates to a method for preparing the ceramic thin film glass encapsulated resistor. The ceramic thin film glass encapsulated resistor described in the present invention has the advantages of high mechanical strength, high reliability, not easy to damage, simple structure and easy preparation.

[0004] However, during use, the male and female heads of the packaged resistor may have poor contact and may fall off easily when separated during insertion, which directly affects the use of the resistor. Utility Model Content

[0005] In order to solve the above problems, the embodiment of the utility model provides a precision resistor which is easy to insert and will not fall off after insertion.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model specifically adopts the following technical scheme: a precision resistor, including a resistor body, a packaging body is arranged outside the resistor body, the packaging body includes a shell, a sealing end cover is arranged at one end of the shell, a plug-in chamber is arranged in the shell, and a positioning module for inserting the resistor body is arranged in the plug-in chamber.

[0007] As a further improvement of the above technical solution:

[0008] The positioning module comprises a guide column, a plug-in through hole is arranged in the middle of the guide column, and an anti-slip step is arranged on the side wall of the guide column.

[0009] An elastic block used in conjunction with the anti-slip step is arranged on the inner side wall of the plug-in chamber.

[0010] The resistor body comprises a substrate, a resistor is arranged on the substrate, and plugging leads corresponding to the positions of the plugging through holes are arranged on both sides of the resistor.

[0011] A tightening block is arranged on the inner side wall of the sealing end cover, and a avoiding groove corresponding to the position of the plug-in lead is arranged on the tightening block.

[0012] A test chamber for inserting a test terminal is arranged at one end of the plug-in chamber away from the sealing end cover, a sealing sleeve is arranged in the test chamber, and a test through hole communicating with the plug-in through hole is arranged in the sealing sleeve.

[0013] The beneficial effects of the embodiments of the utility model are as follows: the precision resistor comprises a resistor body, a packaging body is arranged outside the resistor body, the packaging body comprises a shell, a sealing end cover is arranged at one end of the shell, a plug-in chamber is arranged inside the shell, a positioning module for inserting the resistor body is arranged inside the plug-in chamber, the positioning module is installed in the packaging body, the resistor body is fixed during packaging, and at the same time, it can also play a role in preventing the male head and the female head from falling off when being inserted, thereby effectively improving the stability of the entire resistor during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the resistor body in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the sealing end cover in the utility model;

[0018] Figure 5 It is a schematic diagram of the internal structure of the housing in the utility model;

[0019] Figure 6 It is a structural schematic diagram of the guide column in the utility model.

[0020] In the figure: 1. resistor body; 2. package body; 3. shell; 4. plug-in chamber; 5. positioning module; 6. guide column; 7. plug-in through hole; 8. anti-slip step; 9. elastic block; 10. substrate; 11. resistor element; 12. plug-in lead; 13. sealing end cover; 14. tightening block; 15. avoidance groove; 16. test chamber; 17. sealing sleeve; 18. test through hole. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0022] like Figure 1 As shown, the precision resistor of this embodiment includes a resistor body 1, a packaging body 2 is arranged on the outside of the resistor body 1, the packaging body 2 includes a shell 3, a sealing end cover 13 is arranged at one end of the upper shell 3, a plug-in chamber 4 is arranged in the shell 3, and a positioning module 5 for inserting the resistor body 1 is arranged in the plug-in chamber 4. The positioning module 5 is installed in the packaging body 2 to fix the resistor body 1 during packaging, and at the same time, it can also play a role in preventing the male and female heads from falling off when being inserted, thereby effectively improving the stability of the entire resistor during use.

[0023] The positioning module 5 includes a guide column 6 for guiding when inserting the resistor body 1. The middle part of the guide column 6 is provided with a plug-in hole 7 for plugging in the plug-in lead 12. The side wall of the guide column 6 is provided with an anti-slip step 8. The number of the anti-slip steps 8 is multiple and distributed step by step from one end close to the resistor body 1 to the rear.

[0024] An elastic card block 9 used in conjunction with the anti-slip step 8 is provided on the inner side wall of the plug-in chamber 4. The function of the elastic card block 9 is to be fixed to the anti-slip step 8 on the guide column 6 when the guide column 6 is placed in the plug-in chamber 4, so as to prevent the male and female heads from slipping after docking, thereby playing a locking role and improving the stability of use of the resistor after installation.

[0025] The resistor body 1 includes a substrate 10, which is a PCB board. A resistor element 11 is welded on the substrate 10. Connecting leads 12 corresponding to the positions of the plug-in through holes 7 are provided on both sides of the resistor element 11. The plug-in leads 12 are inserted into the plug-in through holes 7 and fixed by soldering, thereby extending the contact point of the resistor element 11.

[0026] A tightening block 14 is provided on the inner wall of the sealing end cover 13, and a avoiding groove 15 corresponding to the position of the plug-in lead 12 is provided on the tightening block 14. The function of the tightening block 14 is to fix the resistor body 1 and cooperate with the guide column 6 to position the resistor body 1 at both ends of the resistor body 1 to facilitate the packaging operation.

[0027] A test chamber 16 for inserting a test terminal is provided at one end of the plug-in chamber 4 away from the sealing end cover 13. A sealing sleeve 17 is provided in the test chamber 16. A test through hole 18 connected to the plug-in through hole 7 is provided in the sealing sleeve 17. The function of the sealing sleeve 17 is to seal the test end to prevent impurities and water from entering the packaging body 2.

[0028] Working principle / assembly process of this scheme: First, place the test chamber 16 of the guide column 6 into the object packaging body 2. During the insertion process, the anti-slip step 8 will squeeze the elastic block 9 to deform. After the anti-slip step 8 passes, the elastic block 9 is reset to limit the guide column 6 to prevent it from slipping in the opposite direction. A limit block is provided at the other end of the guide column in the plug-in chamber 4, which cooperates with the elastic block 9 to complete the installation and fixation of the guide column. After the guide column 6 is installed, the sealing sleeve 17 is placed in the test chamber 16, so that the plug-in through hole 7 is aligned and connected with the test through hole 17. It should be noted that the sealing sleeve should be centered at 17. The diameter of the middle position is larger than the diameter of the two ends, and it has an interference fit with the test chamber 16 to enhance the sealing. During the production process, the test chamber is used to test the conductivity of the product. During normal operation, the test chamber is used to connect the male or female plug. After the shell 3 is completed, the resistor body 1 is placed in the shell 3. At this time, the plug-in lead 12 is inserted in the guide column 6, and then the sealing end cover 13 is placed at the end of the shell 3 so that the tightening block 14 fits with the substrate 10. Finally, the sealing operation is performed. After the sealing end cover 13 and the shell 3 are connected, a complete package 2 is formed, and the resistor body 1 is protected and sealed.

[0029] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0032] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A precision resistor, comprising a resistor body (1), wherein a packaging body (2) is arranged outside the resistor body (1), characterized in that: The packaging body (2) comprises a shell (3), one end of which is provided with a sealing end cover (13), a plug-in chamber (4) is provided in the shell (3), and a positioning module (5) for plugging in the resistor body (1) is provided in the plug-in chamber (4).

2. The precision resistor according to claim 1, characterized in that: The positioning module (5) comprises a guide column (6), a plug-in through hole (7) is provided in the middle of the guide column (6), and an anti-slip step (8) is provided on the side wall of the guide column (6).

3. The precision resistor according to claim 2, characterized in that: An elastic block (9) for use with the anti-slip step (8) is provided on the inner side wall of the plug-in chamber (4).

4. The precision resistor according to claim 2, characterized in that: The resistor body (1) comprises a substrate (10), a resistor element (11) is arranged on the substrate (10), and plug leads (12) corresponding to the positions of the plug-in through holes (7) are arranged on both sides of the resistor element (11).

5. The precision resistor according to claim 4, characterized in that: A tightening block (14) is provided on the inner side wall of the sealing end cover (13), and a avoiding groove (15) corresponding to the position of the plug-in lead (12) is provided on the tightening block (14).

6. The precision resistor according to claim 1, characterized in that: A test chamber (16) for inserting a test terminal is provided at one end of the plug-in chamber (4) away from the sealing end cover (13), a sealing sleeve (17) is provided in the test chamber (16), and a test through hole (18) communicating with the plug-in through hole (7) is provided in the sealing sleeve (17).

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