CN105845507A - Relay - Google Patents
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- CN105845507A CN105845507A CN201510017731.1A CN201510017731A CN105845507A CN 105845507 A CN105845507 A CN 105845507A CN 201510017731 A CN201510017731 A CN 201510017731A CN 105845507 A CN105845507 A CN 105845507A
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- 230000001681 protective effect Effects 0.000 claims abstract description 28
- 238000005476 soldering Methods 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 12
- 230000004907 flux Effects 0.000 abstract description 7
- 239000011810 insulating material Substances 0.000 abstract description 4
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Switch Cases, Indication, And Locking (AREA)
Abstract
本发明公开一种继电器，包括：外壳，具有基座和覆盖在所述基座的侧部开口上的盖子；线圈元件和触点元件，容纳在所述外壳中；和输入端子和输出端子，分别与线圈元件和触点元件电连接，并从所述外壳的底部伸出，以便焊接到电路板上。其中，所述继电器还包括一个由绝缘材料制成的保护罩，所述保护罩覆盖在所述外壳的底部上，用于密封所述基座与所述盖子之间的缝隙；并且所述保护罩上形成有与所述输出端子对应的第一插孔和与所述输入端子对应的第二插孔，所述输出端子和所述输入端子分别穿过所述第一插孔和所述第二插孔。本发明中，外壳底部上的缝隙被保护罩密封，从而能够有效地防止助焊剂进入继电器的内部，保证了继电器的电气性能。
The present invention discloses a relay comprising: a housing having a base and a cover covering a side opening of the base; a coil element and a contact element accommodated in the housing; and an input terminal and an output terminal, are respectively electrically connected to the coil element and the contact element, and protrude from the bottom of the housing so as to be soldered to the circuit board. Wherein, the relay also includes a protective cover made of insulating material, the protective cover is covered on the bottom of the housing, and is used to seal the gap between the base and the cover; and the protection A first jack corresponding to the output terminal and a second jack corresponding to the input terminal are formed on the cover, and the output terminal and the input terminal pass through the first jack and the second jack respectively. Two jacks. In the present invention, the gap on the bottom of the casing is sealed by the protective cover, thereby effectively preventing solder flux from entering the interior of the relay and ensuring the electrical performance of the relay.
Description
技术领域technical field
本发明涉及一种继电器。The invention relates to a relay.
背景技术Background technique
继电器是一种常用的电器元件。通常，继电器主要包括绝缘外壳和容纳在外壳中的线圈元件、触点元件和电磁铁等部件。继电器的输入端子与线圈元件电连接，继电器的输出端子与触点元件电连接。继电器的输入端子和输出端子一般从外壳的底部伸出，以便焊接到电路板上。A relay is a commonly used electrical component. Generally, a relay mainly includes an insulating casing and components such as a coil element, a contact element, and an electromagnet accommodated in the casing. The input terminal of the relay is electrically connected to the coil element, and the output terminal of the relay is electrically connected to the contact element. The input and output terminals of the relay typically protrude from the bottom of the case for soldering to the circuit board.
继电器的外壳一般由基座和安装在基座上的盖子构成。在现有技术中，基座和盖子之间一般采用卡扣结构相互组装在一起，因此，基座和盖子之间不可避免地会存在缝隙，由于基座和盖子之间的缝隙沿复杂的路径延伸，难以直接点胶密封。在将继电器的输入端子和输出端子焊接到电路板上时(例如，通过波峰焊接的方式焊接到电路板上时)，熔融的助焊剂和汽化的助焊剂(例如，松香)会经由基座和盖子之间的缝隙进入继电器的内部，这会降低甚至破坏继电器的电气性能。The housing of the relay generally consists of a base and a cover mounted on the base. In the prior art, the base and the cover are generally assembled with each other using a snap-fit structure, therefore, there will inevitably be a gap between the base and the cover, because the gap between the base and the cover follows a complicated path Stretches, difficult to seal directly by dispensing. When soldering the input and output terminals of the relay to the circuit board (for example, when soldering to the circuit board by wave soldering), molten flux and vaporized flux (for example, rosin) will pass through the base and Gaps between the covers get into the interior of the relay, which can degrade or even destroy the electrical performance of the relay.
发明内容Contents of the invention
本发明的目的旨在解决现有技术中存在的上述问题和缺陷的至少一个方面。The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and deficiencies in the prior art.
本发明的一个目的在于提供一种继电器，其能够有效地防止在将继电器焊接到电路板上时助焊剂进入继电器的内部。An object of the present invention is to provide a relay that can effectively prevent flux from entering the inside of the relay when the relay is soldered to a circuit board.
根据本发明的一个方面，提供一种继电器，包括：外壳，具有基座和覆盖在所述基座的侧部开口上的盖子；线圈元件和触点元件，容纳在所述外壳中；和输入端子和输出端子，分别与线圈元件和触点元件电连接，并从所述外壳的底部伸出，以便焊接到电路板上。其中，所述继电器还包括一个由绝缘材料制成的保护罩，所述保护罩覆盖在所述外壳的底部上，用于密封所述基座与所述盖子之间的缝隙；并且所述保护罩上形成有与所述输出端子对应的第一插孔和与所述输入端子对应的第二插孔，所述输出端子和所述输入端子分别穿过所述第一插孔和所述第二插孔。According to an aspect of the present invention, there is provided a relay comprising: a housing having a base and a cover covering a side opening of the base; a coil element and a contact element accommodated in the housing; and an input A terminal and an output terminal are respectively electrically connected to the coil element and the contact element, and protrude from the bottom of the housing so as to be soldered to the circuit board. Wherein, the relay also includes a protective cover made of insulating material, the protective cover is covered on the bottom of the housing, and is used to seal the gap between the base and the cover; and the protection A first jack corresponding to the output terminal and a second jack corresponding to the input terminal are formed on the cover, and the output terminal and the input terminal pass through the first jack and the second jack respectively. Two jacks.
根据本发明的一个实例性的实施例，所述第一插孔大于所述输出端子，并且所述输出端子与所述第一插孔之间采用胶水密封。According to an exemplary embodiment of the present invention, the first jack is larger than the output terminal, and glue is used to seal the output terminal and the first jack.
根据本发明的另一个实例性的实施例，所述第二插孔大于所述输入端子，并且所述输入端子与所述第二插孔之间采用胶水密封。According to another exemplary embodiment of the present invention, the second jack is larger than the input terminal, and glue is used to seal the input terminal and the second jack.
根据本发明的另一个实例性的实施例，所述保护罩由塑料制成。According to another exemplary embodiment of the present invention, the protective cover is made of plastic.
根据本发明的另一个实例性的实施例，在所述保护罩的外表面上形成有至少三个定位凸起，所述至少三个定位凸起的顶面位于与所述电路板的表面平行的平面内。According to another exemplary embodiment of the present invention, at least three positioning protrusions are formed on the outer surface of the protective cover, and the top surfaces of the at least three positioning protrusions are located parallel to the surface of the circuit board. within the plane.
根据本发明的另一个实例性的实施例，在所述保护罩的外表面上的四个角落附近分别形成有一个定位凸起。According to another exemplary embodiment of the present invention, a positioning protrusion is respectively formed near the four corners on the outer surface of the protective cover.
根据本发明的另一个实例性的实施例，所述定位凸起支撑在所述电路板的外表面上，使所述保护罩的外表面与所述电路板的外表面平行并且相互间隔开预定距离。According to another exemplary embodiment of the present invention, the positioning protrusion is supported on the outer surface of the circuit board, so that the outer surface of the protective cover is parallel to the outer surface of the circuit board and spaced apart from each other by a predetermined distance.
根据本发明的另一个实例性的实施例，所述盖子通过卡扣结构组装在所述基座上。According to another exemplary embodiment of the present invention, the cover is assembled on the base through a buckle structure.
根据本发明的另一个实例性的实施例，在所述基座和所述盖子中的一个上形成有凸起部，并且在所述基座和所述盖子中的另一个上形成有与所述凸起部接合的卡槽部。According to another exemplary embodiment of the present invention, a protruding part is formed on one of the base and the cover, and a protruding part is formed on the other of the base and the cover. The groove part engaged with the above-mentioned protruding part.
根据本发明的另一个实例性的实施例，所述继电器的输出端子和输入端子通过波峰焊的方式焊接到所述电路板上。According to another exemplary embodiment of the present invention, the output terminal and the input terminal of the relay are soldered to the circuit board by wave soldering.
本发明的前述各个实施例的继电器中，由于在继电器的外壳的底部上安装有一个保护罩，因此，外壳底部上的缝隙被保护罩密封，从而能够有效地防止在将继电器焊接到电路板上时助焊剂进入继电器的内部，保证了继电器的电气性能。In the relays of the foregoing embodiments of the present invention, since a protective cover is installed on the bottom of the housing of the relay, the gap on the bottom of the housing is sealed by the protective cover, thereby effectively preventing the relay from being welded onto the circuit board. When the flux enters the interior of the relay, the electrical performance of the relay is guaranteed.
通过下文中参照附图对本发明所作的描述，本发明的其它目的和优点将显而易见，并可帮助对本发明有全面的理解。Other objects and advantages of the present invention will be apparent from the following description of the present invention with reference to the accompanying drawings, and may help to provide a comprehensive understanding of the present invention.
附图说明Description of drawings
图1显示根据本发明的一个实例性的实施例的继电器的分解示意图；Fig. 1 shows an exploded schematic view of a relay according to an exemplary embodiment of the present invention;
图2显示根据本发明的一个实例性的实施例的继电器的组装示意图；和Fig. 2 shows the assembly diagram of the relay according to an exemplary embodiment of the present invention; With
图3显示将图2所示的继电器焊接到电路板上的示意图。Figure 3 shows a schematic diagram of soldering the relay shown in Figure 2 onto a circuit board.
具体实施方式detailed description
下面通过实施例，并结合附图，对本发明的技术方案作进一步具体的说明。在说明书中，相同或相似的附图标号指示相同或相似的部件。下述参照附图对本发明实施方式的说明旨在对本发明的总体发明构思进行解释，而不应当理解为对本发明的一种限制。The technical solution of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals designate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention, but should not be construed as a limitation of the present invention.
根据本发明的一个总体技术构思，提供一种继电器，包括：外壳，具有基座和覆盖在所述基座的侧部开口上的盖子；线圈元件和触点元件，容纳在所述外壳中；和输入端子和输出端子，分别与线圈元件和触点元件电连接，并从所述外壳的底部伸出，以便焊接到电路板上。其中，所述继电器还包括一个由绝缘材料制成的保护罩，所述保护罩覆盖在所述外壳的底部上，用于密封所述基座与所述盖子之间的缝隙；并且所述保护罩上形成有与所述输出端子对应的第一插孔和与所述输入端子对应的第二插孔，所述输出端子和所述输入端子分别穿过所述第一插孔和所述第二插孔。According to a general technical concept of the present invention, a relay is provided, including: a housing having a base and a cover covering a side opening of the base; a coil element and a contact element accommodated in the housing; and an input terminal and an output terminal, respectively electrically connected to the coil element and the contact element, protruding from the bottom of the housing so as to be soldered to the circuit board. Wherein, the relay also includes a protective cover made of insulating material, the protective cover is covered on the bottom of the housing, and is used to seal the gap between the base and the cover; and the protection A first jack corresponding to the output terminal and a second jack corresponding to the input terminal are formed on the cover, and the output terminal and the input terminal pass through the first jack and the second jack respectively. Two jacks.
图1显示根据本发明的一个实例性的实施例的继电器的分解示意图。Fig. 1 shows an exploded schematic diagram of a relay according to an exemplary embodiment of the present invention.
在本发明的一个实例性的实施例中，公开了一种继电器。如图1所示，该继电器主要包括外壳和容纳在外壳中的线圈元件(未图示)、触点元件(未图示)和电磁铁(未图示)等部件。In an exemplary embodiment of the present invention, a relay is disclosed. As shown in FIG. 1 , the relay mainly includes a casing and a coil element (not shown), a contact element (not shown), an electromagnet (not shown) and other components accommodated in the casing.
如图1所示，在图示的实施例中，继电器的外壳包括基座100和覆盖在基座100的侧部开口上的盖子200。As shown in FIG. 1 , in the illustrated embodiment, the housing of the relay includes a base 100 and a cover 200 covering the side opening of the base 100 .
在本发明的一个实例性的实施例中，盖子200可以通过卡扣结构组装在基座100上。如图1所示，在基座100和盖子200中的一个上形成有凸起部110，并且在基座100和盖子200中的另一个上形成有与该凸起部110接合的卡槽部210。这样，如图1所示，当盖子200组装到基座100上时，凸起部110与卡槽部210接合，从而将盖子200和基座100锁定在一起。In an exemplary embodiment of the present invention, the cover 200 can be assembled on the base 100 through a buckle structure. As shown in FIG. 1 , a raised portion 110 is formed on one of the base 100 and the cover 200 , and a groove portion engaged with the raised portion 110 is formed on the other of the base 100 and the cover 200 210. In this way, as shown in FIG. 1 , when the cover 200 is assembled on the base 100 , the protrusion 110 engages with the groove 210 , thereby locking the cover 200 and the base 100 together.
如图1所示，继电器还包括与线圈元件的两端电连接的多个输入端子20和与多个触点元件电连接的多个输出端子10。输入端子20和输出端子10分别从外壳的底部伸出，以便焊接到电路板400(参见图3)上。As shown in FIG. 1 , the relay further includes a plurality of input terminals 20 electrically connected to both ends of the coil element and a plurality of output terminals 10 electrically connected to the plurality of contact elements. The input terminal 20 and the output terminal 10 protrude from the bottom of the case, respectively, so as to be soldered to a circuit board 400 (see FIG. 3 ).
请继续参见图1，在图示的实施例中，在盖子200和基座100之间形成有缝隙g，该缝隙g在外壳的底部上沿弯曲的路径延伸，难以直接点胶密封。Please continue to refer to FIG. 1 , in the illustrated embodiment, a gap g is formed between the cover 200 and the base 100 , the gap g extends along a curved path on the bottom of the casing, and it is difficult to directly dispense glue for sealing.
图2显示根据本发明的一个实例性的实施例的继电器的组装示意图。Fig. 2 shows a schematic diagram of assembly of a relay according to an exemplary embodiment of the present invention.
为了密封外壳的底部上的缝隙g，在本发明的一个实例性的实施例中，如图1和图2所示，提供一个由绝缘材料制成的保护罩300，该保护罩300直接套装和覆盖在继电器外壳的底部上，从而密封住基座100与盖子200之间的缝隙g。In order to seal the gap g on the bottom of the housing, in an exemplary embodiment of the present invention, as shown in Figures 1 and 2, a protective cover 300 made of insulating material is provided, which is directly fitted and Covering on the bottom of the relay case, thereby sealing the gap g between the base 100 and the cover 200 .
图3显示将图2所示的继电器焊接到电路板400上的示意图。FIG. 3 shows a schematic diagram of soldering the relay shown in FIG. 2 onto a circuit board 400 .
如图1、图2和图3所示，在本发明的前述实施例中，在将继电器的输入端子20和输出端子10焊接到电路板400上时，例如，通过波峰焊的方式焊接到电路板400上时，助焊剂，例如，松香，就不能经由外壳底部上的缝隙g进入继电器的内部，从而能够保证继电器的电气性能。As shown in Fig. 1, Fig. 2 and Fig. 3, in the foregoing embodiments of the present invention, when the input terminal 20 and the output terminal 10 of the relay are soldered to the circuit board 400, for example, soldered to the circuit by means of wave soldering When the board 400 is on the board 400, the flux, such as rosin, cannot enter the interior of the relay through the gap g on the bottom of the housing, so that the electrical performance of the relay can be guaranteed.
请继续参见图1和图2，在图示的实施例中，在保护罩300上形成有与输出端子10对应的第一插孔310和与输入端子20对应的第二插孔320。输出端子10和输入端子20分别经由第一插孔310和第二插孔320延伸至外部。Please continue to refer to FIG. 1 and FIG. 2 , in the illustrated embodiment, a first insertion hole 310 corresponding to the output terminal 10 and a second insertion hole 320 corresponding to the input terminal 20 are formed on the protective cover 300 . The output terminal 10 and the input terminal 20 extend to the outside through the first jack 310 and the second jack 320 , respectively.
在本发明的一个实例性的实施例中，为了便于输出端子10和输入端子20穿过，第一插孔310和第二插孔320可以被形成为分别稍大于输出端子10和输入端子20。In an exemplary embodiment of the present invention, in order to facilitate passage of the output terminal 10 and the input terminal 20 , the first insertion hole 310 and the second insertion hole 320 may be formed slightly larger than the output terminal 10 and the input terminal 20 respectively.
为了防止助焊剂经由输出端子10与第一插孔310之间的缝隙以及输入端子20与第二插孔320之间的缝隙进入继电器的内部，在本发明的一个实例性的实施例中，输出端子10与第一插孔310之间采用胶水密封，并且输入端子20与第二插孔320之间采用胶水密封。In order to prevent flux from entering the interior of the relay through the gap between the output terminal 10 and the first jack 310 and the gap between the input terminal 20 and the second jack 320, in an exemplary embodiment of the present invention, the output Glue is used to seal between the terminal 10 and the first insertion hole 310 , and glue is used to seal between the input terminal 20 and the second insertion hole 320 .
在本发明的一个实例性的实施例中，保护罩300可以由塑料制成。保护罩300的材料可以与继电器的基座100和盖子200的材料相同。In an exemplary embodiment of the present invention, the protective cover 300 can be made of plastic. The material of the protective cover 300 may be the same as that of the base 100 and the cover 200 of the relay.
如图1、图2和图3所示，在本发明的一个实例性的实施例中，在保护罩300的外表面上形成有至少三个定位凸起330，这至少三个定位凸起330的顶面位于与电路板400的表面平行的平面内。这些定位凸起330被构造成用于支撑在电路板400的外表面上，如图3所示，使保护罩300的外表面与电路板400的外表面平行并且相互间隔开预定距离。这样，能够保证继电器的输出端子10和输入端子20相对于电路板400以垂直的姿态插入电路板上的插孔中，并且能够防止保护罩300的外表面与电路板400的外表面接触，这能够防止保护罩300在焊接时受热变形。As shown in Fig. 1, Fig. 2 and Fig. 3, in an exemplary embodiment of the present invention, at least three positioning protrusions 330 are formed on the outer surface of the protective cover 300, and the at least three positioning protrusions 330 The top surface of is located in a plane parallel to the surface of the circuit board 400 . The positioning protrusions 330 are configured to be supported on the outer surface of the circuit board 400 , as shown in FIG. 3 , so that the outer surface of the protective cover 300 is parallel to the outer surface of the circuit board 400 and spaced apart from each other by a predetermined distance. In this way, it can be ensured that the output terminal 10 and the input terminal 20 of the relay are inserted into the socket on the circuit board in a vertical posture relative to the circuit board 400, and the outer surface of the protective cover 300 can be prevented from contacting the outer surface of the circuit board 400, which It is possible to prevent the protective cover 300 from being deformed by heat during welding.
在图示的实施例中，如图1、图2和图3所示，在保护罩300的外表面上的四个角落附近分别形成有一个定位凸起330。In the illustrated embodiment, as shown in FIG. 1 , FIG. 2 and FIG. 3 , a positioning protrusion 330 is respectively formed near the four corners on the outer surface of the protective cover 300 .
虽然结合附图对本发明进行了说明，但是附图中公开的实施例旨在对本发明优选实施方式进行示例性说明，而不能理解为对本发明的一种限制。Although the present invention has been described with reference to the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation of the present invention.
虽然本总体发明构思的一些实施例已被显示和说明，本领域普通技术人员将理解，在不背离本总体发明构思的原则和精神的情况下，可对这些实施例做出改变，并且各种实施例中所描述的结构在不发生结构或者原理方面的冲突的情况下可以进行自由组合，本发明的范围以权利要求和它们的等同物限定。While certain embodiments of the present general inventive concept have been shown and described, it will be understood by those of ordinary skill in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, and various The structures described in the embodiments can be combined freely without conflicts in structure or principle, and the scope of the present invention is defined by the claims and their equivalents.
应注意，措词“包括”不排除其它元件或步骤，措词“一”或“一个”不排除多个。另外，权利要求的任何元件标号不应理解为限制本发明的范围。It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. Furthermore, any element references in the claims should not be construed as limiting the scope of the invention.
Claims (10)
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| CN201510017731.1A CN105845507B (en) | 2015-01-13 | 2015-01-13 | Relay |
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| CN105845507B CN105845507B (en) | 2018-12-21 |
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| CN106252160A (en) * | 2016-10-09 | 2016-12-21 | 苏州安来强电子科技有限公司 | Closed type D.C. contactor with auxiliary switch |
| CN108155063A (en) * | 2018-02-09 | 2018-06-12 | 太仓神明电子有限公司 | A kind of vehicle-mounted Shuangzi relay and manufacturing method |
| CN109308978A (en) * | 2017-07-28 | 2019-02-05 | 富士通电子零件有限公司 | Electromagnetic relay unit |
| EP3462472A1 (en) * | 2017-09-29 | 2019-04-03 | Tyco Electronics Componentes Electromecanicos Lda | Seal housing for an electrical device and sealed relay using the seal housing |
| CN110660614A (en) * | 2019-10-09 | 2020-01-07 | 浙江美硕电气科技股份有限公司 | A permanent magnet contactor sealed housing |
| CN113555255A (en) * | 2021-03-18 | 2021-10-26 | 厦门宏发电声股份有限公司 | Canned type relay |
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| CN106252160A (en) * | 2016-10-09 | 2016-12-21 | 苏州安来强电子科技有限公司 | Closed type D.C. contactor with auxiliary switch |
| CN109308978A (en) * | 2017-07-28 | 2019-02-05 | 富士通电子零件有限公司 | Electromagnetic relay unit |
| EP3462472A1 (en) * | 2017-09-29 | 2019-04-03 | Tyco Electronics Componentes Electromecanicos Lda | Seal housing for an electrical device and sealed relay using the seal housing |
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| CN110660614A (en) * | 2019-10-09 | 2020-01-07 | 浙江美硕电气科技股份有限公司 | A permanent magnet contactor sealed housing |
| CN113555255A (en) * | 2021-03-18 | 2021-10-26 | 厦门宏发电声股份有限公司 | Canned type relay |
| CN113555255B (en) * | 2021-03-18 | 2024-02-20 | 厦门宏发电声股份有限公司 | Sealed relay |
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| Publication number | Publication date |
|---|---|
| CN105845507B (en) | 2018-12-21 |
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