PCB type relay packaging shell and vehicle
By designing a PCB relay package housing including inner shell and outer packaging, the problem of freezing of the relay in winter is solved, and the normal operation of the relay in low temperature environment is achieved.
Patent Information
- Application Number
- CN202421502494.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-27
AI Technical Summary
After the PCB relay is disconnected in winter, the contacts are prone to freezing, resulting in functional failure.
A PCB type relay encapsulation housing including an inner shell and an outer packaging is designed. The outer packaging cover is arranged at the sealing place of the inner shell, leaving a gap to isolate the inner shell from the external environment and prevent cold and humid air from entering.
It effectively avoids icing of the relay contacts and ensures that the relay can work normally in a low-temperature environment.
Smart Images
Figure CN222734893U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fuse box accessories, and more specifically, relates to a PCB type relay packaging shell and a vehicle. Background Art
[0002] During the production of PCB fuse boxes, PCB relays need to be soldered to the PCB board. During the soldering process, the furnace temperature reaches 260°C, which can easily cause the sealant on the PCB relay housing to leak, resulting in gaps in the PCB relay package housing. In winter, the low temperature and high humidity environment outside may enter the interior of the relay. When the relay stops working, the temperature of the contacts will drop, and there is a possibility of ice on the contacts during the process of the contact temperature dropping. The ice on the contacts will cause the contacts to fail to conduct when the relay works again, resulting in a failure of function. Utility Model Content
[0003] The utility model aims to provide a PCB type relay packaging shell, aiming to solve the problem that after the PCB type relay in the existing fuse box is disconnected in winter, the contact points are prone to ice.
[0004] To achieve the above-mentioned purpose, in a first aspect, the technical solution adopted by the utility model is: to provide a PCB type relay packaging shell, comprising:
[0005] An inner housing, the interior of which is used to install a relay, the bottom surface and surrounding sides of the inner housing are sealed with glue; the inner housing is connected to the PCB board; and
[0006] The outer package is covered on the outside of the inner shell and is used to seal the glue seal of the inner shell so as to isolate the inner shell from the external environment. A gap is reserved between the side wall of the outer package and the inner shell.
[0007] In a possible implementation, the outer package is annular and is disposed along the sealing portion of the inner shell.
[0008] In a possible implementation manner, an isolation groove is provided on the inner wall of the outer package.
[0009] In a possible implementation, the outer package is a shell with an opening at the bottom, and the outer package is disposed outside the inner shell through the opening at the bottom.
[0010] In a possible implementation, a first separation groove is formed on an inner side wall of the outer package.
[0011] In a possible implementation, a second separation groove is formed on the outer side wall of the inner shell.
[0012] In a possible implementation, first protrusions are provided on four corners of the top inner wall of the outer package.
[0013] In a possible implementation manner, a second protrusion is provided on the top inner wall of the outer package.
[0014] In a possible implementation, a third separation groove is provided on the inner side surface of the top of the external package.
[0015] In a second aspect, the utility model provides a vehicle, which includes the PCB type relay packaging shell as described in the first aspect.
[0016] The beneficial effect of the PCB type relay package shell provided by the utility model is that: compared with the prior art, the utility model PCB type relay package shell and the relay are installed inside the inner shell, and the sealant of the inner shell is sealed with the outer package, and the relay is isolated from the external environment by the inner shell and the outer package. When the relay is welded on the PCB board, even if the sealant of the inner shell melts due to high temperature, the outer package will seal the gap on the inner shell. In winter, the low temperature and humid environment of the outside world cannot contact the contacts of the relay, avoiding ice formation at the contacts of the relay. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic diagram of a first structure of a PCB type relay package housing provided by an embodiment of the utility model;
[0019] Figure 2 for Figure 1 The schematic diagram of the structure of the outer package shown;
[0020] Figure 3 A second structural schematic diagram of a PCB type relay package housing provided by an embodiment of the utility model;
[0021] Figure 4 for Figure 3 A schematic structural diagram of the outer package.
[0022] Description of reference numerals:
[0023] 1. Inner shell; 11. Second separation groove; 2. External package; 21. Isolation groove; 22. First separation groove; 23. First protrusion; 24. Second protrusion; 25. Third separation groove. DETAILED DESCRIPTION
[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0025] PCB relay is a miniaturized electronic control device, in which the circuit board makes the circuit miniaturized and intuitive, and plays an important role in the mass production of fixed circuits and the optimization of electrical appliance layout. It has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually used in automatic control circuits. PCB relay is actually an "automatic switch" that uses a smaller current to control a larger current, and plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit. Due to its small size, powerful functions and easy integration, PCB relays are widely used in automation control fields such as petrochemical instruments and equipment, food machinery, packaging machinery, textile machinery, CNC machine tools, plastic machinery, fitness equipment, and entertainment equipment. It can control small motors, incandescent lamps, indicator lights, low-power power supplies, intelligent instruments and meters, and various solenoid valves, etc. It can also be used as a driving stage for high-power electromagnetic contactors.
[0026] Reference Figure 1 and Figure 4 Now, the PCB type relay packaging shell and vehicle provided by the utility model are described.
[0027] In the first aspect, the PCB type relay package shell provided in this embodiment includes an inner shell 1 and an outer package 2 covered on the outside of the inner shell 1. A certain gap is reserved between the outer package 2 and the inner shell 1. The inner shell 1 includes a bottom cover and an inner shell. The PCB relay is fixed on the bottom cover, and the bottom cover and the inner shell are sealed by a sealant. The outer package 2 is covered at the sealant between the bottom cover and the inner shell to isolate the inner shell 1 from the external environment.
[0028] When soldering PCB relays, you need to pay attention to temperature control, otherwise the temperature is too high, which will not only lead to loose soldering, but also damage the electronic components. The soldering temperature of PCB relays needs to be determined through experiments, and the specific temperature depends on factors such as the material, size, and ambient temperature of the relay. Generally speaking, 220℃-250℃ is the appropriate soldering temperature range. If the material of the relay is fragile, the temperature can be appropriately lowered to around 200℃. It should be noted that excessively high soldering temperatures will cause the contact points to become numb, resulting in failure of the relay switch.
[0029] The high temperature generated when the PCB relay is welded to the PCB board will cause part of the sealing glue between the bottom cover and the inner shell to melt, thereby causing a gap between the bottom cover and the inner shell. In winter, the cold and humid air from the outside environment will enter the inner shell 1 through the gap, causing more water vapor to exist in the working environment of the PCB relay. When the PCB relay finishes working, the contact temperature of the PCB relay gradually decreases. When the temperature of the contact drops below the freezing point, ice will form on the contact. When the PCB relay works next time, the contact cannot be closed normally, the circuit cannot be connected, and it cannot work normally.
[0030] Compared with the prior art, the PCB type relay package shell provided by the utility model has a cover arranged at the sealing part between the bottom cover and the inner shell. During the welding process of the PCB relay, if a gap appears between the bottom cover and the inner shell, the outer package 2 will seal the gap to prevent the cold and humid air in the external environment from entering the inner shell 1 through the gap, thereby preventing ice from forming on the contacts of the PCB relay.
[0031] The inner shell 1 and the outer package 2 are made of polycarbonate plastic. Polycarbonate plastic is also called PC (Polycarbonate) plastic. It has the characteristics of colorless, transparent, heat-resistant, impact-resistant and flame-retardant BI level. Polycarbonate plastic has good mechanical properties within the normal use temperature. Compared with polymethyl methacrylate with similar performance, polycarbonate has good impact resistance, high refractive index, good processing performance, and has UL94 V-2 flame retardant performance without additives.
[0032] Reference Figure 2 Optionally, the outer package 2 is annular in shape. The outer package 2 seals the sealant of the inner shell 1. The air in the external environment cannot enter the fixed inner shell 1. The inner shell 1 is filled with dry air or dry inert gas. In the cold winter, the temperature of the external environment drops below the freezing point. Even if the temperature in the inner shell 1 is below the freezing point, since the inner shell 1 does not contain water vapor, ice will not form on the contacts of the PCB relay.
[0033] Optionally, an isolation groove 21 is provided on the inner wall of the outer package 2. Under the action of the isolation groove 21, a closed space is formed between the outer package 2 and the inner shell 1. The closed space between the outer package 2 and the inner shell 1 is filled with air, and the inner shell 1 is also filled with air. After the outer package 2 isolates the sealant of the inner shell 1, the air layer between the outer package 2 and the inner shell 1 is used for heat preservation to prevent the temperature inside the inner shell 1 from changing too much with the external environment, thereby preventing the temperature inside the inner shell 1 from dropping below the freezing point, thereby preventing ice from forming on the contacts of the PCB relay.
[0034] Optionally, an isolation groove 21 is provided on the outer wall of the inner shell 1. Under the action of the isolation groove 21, a closed space is formed between the outer package 2 and the inner shell 1. The closed space between the outer package 2 and the inner shell 1 is filled with air, and the inner shell 1 is also filled with air. After the outer package 2 isolates the sealant of the inner shell 1, the air layer between the outer package 2 and the inner shell 1 is used for heat preservation to prevent the temperature inside the inner shell 1 from changing too much with the external environment, thereby preventing the temperature inside the inner shell 1 from dropping below the freezing point, thereby preventing ice from forming on the contacts of the PCB relay.
[0035] Optionally, an isolation groove 21 is provided on the inner wall of the outer package 2 and the outer wall of the inner shell 1. Under the action of the isolation groove 21, a closed space is formed between the outer package 2 and the inner shell 1. The closed space between the outer package 2 and the inner shell 1 is filled with air, and the inner shell 1 is also filled with air. After the outer package 2 isolates the sealant of the inner shell 1, the air layer between the outer package 2 and the inner shell 1 is used for heat preservation to prevent the temperature inside the inner shell 1 from changing too much with the external environment, thereby preventing the temperature inside the inner shell 1 from dropping below the freezing point, thereby preventing ice from forming on the contacts of the PCB relay.
[0036] Reference Figure 3 Optionally, the outer package 2 is a shell with an opening at the bottom. The outer package 2 is sleeved on the inner shell 1 through the opening. The outer package 2 wraps and seals the side and top surface of the inner shell 1. The air in the external environment cannot enter the fixed inner shell 1. The inner shell 1 is filled with dry air or dry inert gas. In the cold winter, the temperature of the external environment drops below the freezing point. Even if the temperature in the inner shell 1 is lower than the freezing point, since the inner shell 1 does not contain water vapor, ice will not form on the contacts of the PCB relay. At the same time, the inner shell 1 is wrapped by the outer package 2 to prevent the inner shell 1 from directly contacting the external environment, slow down the rate of change of the temperature inside the inner shell 1, and further reduce the possibility of freezing of the PCB relay contacts.
[0037] Reference Figure 4 Optionally, a certain gap is reserved between the outer package 2 and the inner shell 1. The gap between the outer package 2 and the inner shell 1 is filled with dry air or inert gas. The inner shell 1 is prevented from directly contacting the outer package 2. The outer package 2 is isolated from the inner shell 1 by the dry gas between the outer package 2 and the inner shell 1, and the inner shell 1 is prevented from directly contacting the outer package 2, thereby further reducing the rate at which the temperature inside the inner shell 1 decreases, and reducing the possibility of icing of the PCB relay contacts.
[0038] Optionally, a first separation groove 22 is provided on the inner side wall of the outer package 2. The first separation groove 22 separates the outer package 2 from the inner shell 1. The first separation groove 22 is filled with dry air or inert gas. The dry air or inert gas in the first separation groove 2 prevents the inner shell 1 from directly contacting the outer package 2. The dry gas between the outer package 2 and the inner shell 1 isolates the outer package 2 from the inner shell 1, preventing the inner shell 1 from directly contacting the outer package 2, further reducing the rate at which the temperature inside the inner shell 1 decreases, and reducing the possibility of icing of the PCB relay contacts.
[0039] Optionally, a second separation groove 11 is provided on the outer wall of the inner shell 1. The second separation groove 11 separates the outer package 2 from the inner shell 1. The second separation groove 11 is filled with dry air or inert gas. The dry air or inert gas in the second separation groove 11 prevents the inner shell 1 from directly contacting the outer package 2, and isolates the outer package 2 from the inner shell 1 through the dry gas between the outer package 2 and the inner shell 1, preventing the inner shell 1 from directly contacting the outer package 2, further reducing the rate at which the temperature inside the inner shell 1 decreases, and reducing the possibility of icing of the PCB relay contacts.
[0040] Optionally, a first separation groove 22 is provided on the inner side wall of the outer package 2, and a second separation groove 11 is provided on the outer side wall of the inner shell 1. The first separation groove 22 and the second separation groove 11 are arranged opposite to each other, and the first separation groove 22 and the second separation groove 11 separate the outer package 2 from the inner shell 1. The first separation groove 22 and the second separation groove 11 are filled with dry air or inert gas. The dry air or inert gas in the first separation groove 22 and the second separation groove 11 prevents the inner shell 1 from directly contacting the outer package 2, and the outer package 2 is isolated from the inner shell 1 by the dry gas between the outer package 2 and the inner shell 1, so as to prevent the inner shell 1 from directly contacting the outer package 2, further reduce the rate at which the temperature inside the inner shell 1 decreases, and reduce the possibility of icing of the PCB relay contacts.
[0041] Reference Figure 4 Optionally, first protrusions 23 are provided at the four corners of the inner wall at the top of the outer package 2. When the outer package 2 and the inner housing 1 are assembled, under the action of the first protrusions 23, the top of the inner housing 1 does not contact the top of the outer package 2, and there is a certain space, thereby separating the inner housing 1 from the outer package 2. This further avoids contact between the inner housing 1 and the outer package 2, reduces the influence of the external environment on the temperature of the inner housing 1, and further reduces the possibility of ice formation on the contacts of the PCB relay inside the inner housing 1.
[0042] Optionally, a second protrusion 24 is provided at the center of the top inner wall of the outer package 2. When the outer package 2 and the inner housing 1 are assembled, under the action of the second protrusion 24, the top of the inner housing 1 does not contact the top of the outer package 2, and there is a certain space, thereby separating the inner housing 1 from the outer package 2. This further avoids contact between the inner housing 1 and the outer package 2, reduces the influence of the external environment on the temperature of the inner housing 1, and further reduces the possibility of ice formation on the contacts of the PCB relay inside the inner housing 1.
[0043] Optionally, a first protrusion 23 is provided at each of the four corners of the top inner wall of the outer package 2. A second protrusion 24 is provided at the center of the top inner wall of the outer package 2. The first protrusion 23 and the second protrusion 24 have the same thickness, and the first protrusion 23 and the second protrusion 24 cooperate to separate the outer package 2 from the inner housing 1. This further avoids contact between the inner housing 1 and the outer package 2, reduces the influence of the external environment on the temperature of the inner housing 1, and further reduces the possibility of ice formation on the contacts of the PCB relay inside the inner housing 1.
[0044] Optionally, third protrusions are provided at the four corners of the top outer wall of the inner housing 1. When the outer package 2 and the inner housing 1 are assembled, under the action of the third protrusions, the top of the inner housing 1 does not contact the top of the outer package 2, and there is a certain space, thereby separating the inner housing 1 from the outer package 2. This further avoids contact between the inner housing 1 and the outer package 2, reduces the impact of the external environment on the temperature of the inner housing 1, and further reduces the possibility of ice forming on the contacts of the PCB relay inside the inner housing 1.
[0045] Optionally, a fourth protrusion is provided at the center of the top outer wall of the inner housing 1. When the outer package 2 and the inner housing 1 are assembled, under the action of the fourth protrusion, the top of the inner housing 1 does not contact the top of the outer package 2, and there is a certain space, thereby separating the inner housing 1 from the outer package 2. This further avoids contact between the inner housing 1 and the outer package 2, reduces the influence of the external environment on the temperature of the inner housing 1, and further reduces the possibility of ice forming on the contacts of the PCB relay inside the inner housing 1.
[0046] Optionally, a third protrusion is provided at each of the four corners of the top inner wall of the outer package 2. A fourth protrusion is provided at the center of the top inner wall of the outer package 2. The third protrusion has the same thickness as the fourth protrusion, and the third protrusion cooperates with the fourth protrusion to separate the outer package 2 from the inner shell 1. This further avoids contact between the inner shell 1 and the outer package 2, reduces the influence of the external environment on the temperature of the inner shell 1, and further reduces the possibility of ice formation on the contacts of the PCB relay inside the inner shell 1.
[0047] Optionally, a first protrusion 23 is provided at the four corners of the top inner wall of the outer package 2. A second protrusion 24 is provided at the central position of the top inner wall of the outer package 2. A third protrusion is provided at the four corners of the top inner wall of the outer package 2. A fourth protrusion is provided at the central position of the top inner wall of the outer package 2. The first protrusion 23, the second protrusion 24, the third protrusion and the fourth protrusion have the same thickness, the positions of the first protrusion 23 and the third protrusion correspond, and the positions of the second protrusion 24 and the fourth protrusion correspond. The first protrusion 23, the second protrusion 24, the third protrusion and the fourth protrusion cooperate to separate the outer package 2 from the inner shell 1. Further avoid contact between the inner shell 1 and the outer package 2, reduce the influence of the external environment on the temperature of the inner shell 1, and further reduce the possibility of ice formation on the contacts of the PCB relay inside the inner shell 1.
[0048] Dry air or inert gas is filled between the outer package 2 and the inner shell 1. The dry air or inert gas in the fourth separation tank prevents the inner shell 1 from directly contacting the outer package 2, and the dry gas between the outer package 2 and the inner shell 1 isolates the outer package 2 from the inner shell 1, preventing the inner shell 1 from directly contacting the outer package 2, further reducing the rate at which the temperature inside the inner shell 1 decreases, and reducing the possibility of icing of the PCB relay contacts.
[0049] Optionally, a third separation groove 25 is provided on the inner side surface of the top of the outer package 2. The third separation groove 25 separates the outer package 2 from the inner shell 1. The third separation groove 25 is filled with dry air or inert gas. The dry air or inert gas in the third separation groove 25 prevents the inner shell 1 from directly contacting the outer package 2. The dry gas between the outer package 2 and the inner shell 1 isolates the outer package 2 from the inner shell 1, preventing the inner shell 1 from directly contacting the outer package 2, further reducing the rate at which the temperature inside the inner shell 1 decreases, and reducing the possibility of icing of the PCB relay contacts.
[0050] Optionally, a fourth separation groove is provided on the top outer side wall of the inner shell 1. The fourth separation groove separates the outer package 2 from the inner shell 1. The fourth separation groove is filled with dry air or inert gas. The dry air or inert gas in the fourth separation groove prevents the inner shell 1 from directly contacting the outer package 2. The dry gas between the outer package 2 and the inner shell 1 isolates the outer package 2 from the inner shell 1, preventing the inner shell 1 from directly contacting the outer package 2, further reducing the rate at which the temperature inside the inner shell 1 decreases, and reducing the possibility of icing of the PCB relay contacts.
[0051] Optionally, a third separation groove 25 is provided on the top inner side wall of the outer package 2, and a fourth separation groove is provided on the top outer side wall of the inner shell 1. The third separation groove 25 and the fourth separation groove are arranged opposite to each other, and the third separation groove 25 and the fourth separation groove separate the outer package 2 from the inner shell 1. The third separation groove 25 and the fourth separation groove are filled with dry air or inert gas. The dry air or inert gas in the third separation groove 25 and the fourth separation groove prevents the inner shell 1 from directly contacting the outer package 2, and the outer package 2 is isolated from the inner shell 1 by the dry gas between the outer package 2 and the inner shell 1, so as to prevent the inner shell 1 from directly contacting the outer package 2, further reduce the rate of temperature reduction inside the inner shell 1, and reduce the possibility of icing of the PCB relay contacts.
[0052] Optionally, a mounting groove is provided on the bottom cover. The PCB relay is installed in the mounting groove. A plurality of mounting pins are provided on the bottom cover. A plurality of positioning holes are provided on the PCB board, and the positions of the positioning holes correspond to the positions of the mounting pins. When soldering the PCB relay, the mounting pins on the bottom cover are positioned with the positioning holes, and the mounting pins are inserted into the positioning holes so that the PCB relay can be soldered on the PCB board.
[0053] In a second aspect, this embodiment provides a vehicle, comprising a PCB type relay packaging shell as described in the first aspect.
[0054] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. PCB type relay packaging shell, characterized in that: include: An inner housing (1), the interior of which is used to install a relay, and the bottom surface and surrounding sides of the inner housing (1) are sealed with glue; The inner housing (1) is connected to the PCB board; and The outer package (2) is covered on the outside of the inner shell (1), and the outer package (2) is used to seal the glue sealing part of the inner shell (1) so as to isolate the inner shell (1) from the external environment. A gap is reserved between the side wall of the outer package (2) and the inner shell (1).
2. The PCB type relay package housing according to claim 1, characterized in that: The outer package (2) is annular and is arranged along the sealing portion of the inner shell (1).
3. The PCB type relay package housing as claimed in claim 2, characterized in that: An isolation groove (21) is provided on the inner wall of the outer package (2).
4. The PCB type relay package housing according to claim 1, characterized in that: The outer package (2) is a shell with an opening at the bottom, and the outer package (2) is disposed outside the inner shell (1) through the opening at the bottom.
5. The PCB type relay package housing as claimed in claim 4, characterized in that: The inner side wall of the outer package (2) is provided with a first separation groove (22).
6. The PCB type relay package housing as claimed in claim 4, characterized in that: The outer side wall of the inner shell (1) is provided with a second separation groove (11).
7. The PCB type relay package housing according to claim 5 or 6, characterized in that: First protrusions (23) are provided on the four corners of the top inner wall of the outer package (2).
8. The PCB type relay package housing as claimed in claim 7, characterized in that: A second protrusion (24) is provided on the top inner wall of the outer package (2).
9. The PCB type relay package housing as claimed in claim 4, characterized in that: A third separation groove (25) is provided on the inner side surface of the top of the outer package (2).
10. A vehicle, characterized in that: It comprises a PCB type relay packaging shell as described in any one of claims 1 to 9.