Double-layer isolation groove structure
By introducing a double-layer isolation groove structure into the cavity filter, the signal leakage problem caused by the large number of crimp surfaces and insufficient screw torque is solved, and the close connection between the filter cover plate and the shell is achieved, which improves the reliability of signal transmission.
Patent Information
- Application Number
- CN202422118910.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-08-29
AI Technical Summary
In the existing cavity filters, there are many crimping surfaces at the connection between the filter cover plate and the filter housing and insufficient screw torque, resulting in leakage of signal sources and affecting the filtering effect.
A double-layer isolation groove structure is designed, the isolation grooves are distributed between threaded holes and one side of the outer circumference. They are connected by chamfering guided and fastening screws to form two parallel isolation grooves and isolation belts, reducing the contact area and improving the crimping effect.
Effectively avoid signal source leakage, improve the crimping effect between the filter cover plate and the shell, and prevent the filtering effect from decreasing.
Smart Images
Figure CN223167635U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of filters, and more specifically, it relates to a double-layer isolation groove structure. Background Art
[0002] With the development of communication technology, the use of communication devices is becoming more and more widespread; as a component of a communication device, people have put forward higher and higher requirements for the quality, weight, reliability, cost, etc. of cavity filters; a resonance rod is installed in a cavity filter, and the resonance rod is generally fixed on a positioning post with a fastening screw. In order to partition the cavity, it is necessary to locally partition the cavity through a partition plate.
[0003] However, in the current partition plate and the cavity filter, since the connection between the filter housing and the filter cover plate is fastened by screw connection, there will be a state of many crimping surfaces formed on the crimping surface formed between the partition plate and the filter cover plate and the crimping surface formed between the outer peripheral edge of the filter housing and the filter cover plate, as well as the problem of insufficient screw torque on the filter cover plate, which further affects the crimping effect between the filter cover plate and the filter housing, and thus affects the leakage of the signal source, and improvement is needed. Summary of the Invention
[0004] In view of this, the purpose of this application is to provide a double-layer isolation groove structure to achieve the purpose of avoiding signal source leakage. The specific scheme is as follows:
[0005] A double-layer isolation groove structure includes a filter housing and a filter cover plate matching with the filter housing. A filter cavity is arranged in the filter housing, a partition plate is arranged in the filter cavity, fastening screws for connection and fixation are arranged between the filter cover plate and the outer peripheral side of the filter housing and between the partition plate, an isolation groove and a plurality of threaded holes matching with the fastening screws are arranged on the upper side of the partition plate, and the isolation groove is distributed between adjacent two of the threaded holes and on the outer peripheral side of the threaded holes.
[0006] Preferably: a chamfer is arranged at the opening of the threaded hole, and the chamfer is communicated with the isolation groove.
[0007] Preferably: there are two isolation grooves formed between adjacent two of the threaded holes and they are parallel to each other, and an isolation band is formed between the two isolation grooves.
[0008] Preferably: the part of the partition plate provided with the threaded holes is cylindrical, and the part between adjacent two of the threaded holes is plate-shaped.
[0009] Preferably: the width of the plate-shaped part of the partition plate is smaller than the diameter of the threaded hole.
[0010] As can be seen from the above solution, the present application provides a double-layer isolation groove structure, and this double-layer isolation groove structure has the following beneficial effects: by reducing the contact area with the filter cover plate through the isolation groove, the filter cover plate is tightly pressed against the upper layer of the partition plate and the upper layer of the filter housing under the action of the fastening screw, thereby improving the pressing effect between the filter cover plate and the filter housing, and effectively avoiding the problem of reduced filtering effect caused by signal source leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is a schematic structural diagram of this embodiment
[0012] Figure 2 is a schematic cross-sectional structural diagram of this embodiment
[0013] Figure 3 is Figure 2 an enlarged schematic structural diagram of part A in
[0014] Description of the reference numerals: 1. Filter housing; 11. Filter cavity; 12. Partition plate; 121. Threaded hole; 122. Isolation groove; 123. Isolation band; 2. Filter cover plate; 3. Fastening screw. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] To make the technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.
[0016] As Figure 1 shown, a double-layer isolation groove 122 structure includes a filter housing 1 and a filter cover plate 2 that matches the filter housing 1. A filter cavity 11 is provided inside the filter housing 1, and a partition plate 12 is provided inside the filter cavity 11.
[0017] It should be noted that, in order to effectively seal the filter cavity 11 to achieve an effective filtering effect, fastening screws 3 for connecting and fixing are provided on both the outer peripheral side of the filter cover plate 2 and the filter housing 1 and between the filter cover plate 2 and the partition plate 12.
[0018] As Figure 2 , Figure 3As shown in the figure, an isolation groove 122 and a plurality of threaded holes 121 that are matingly connected to the fastening screws 3 are provided on the upper side of the partition plate 12. The isolation grooves 122 are distributed between two adjacent threaded holes 121 and on the outer peripheral side of the threaded holes 121, and form spaced chambers between the upper layer of the partition plate 12 and the filter cover plate 2 in a form of mutual connection, effectively reducing the contact area while improving the crimping effect.
[0019] It should be mentioned that a chamfer is provided at the opening of the threaded hole 121. The chamfer communicates with the isolation groove 122, and the chamfer is used to guide the mating threaded connection of the fastening screw 3 and to combine the threaded hole 121 with the isolation groove 122, thereby preventing the problem of insufficient torque of the fastening screw 3 caused by excessive contact area on the lower side of the filter cover plate 2. In order to further improve the crimping structure formed between the filter cover plate 2 and the filter housing 1 and the partition plate 12, two parallel isolation grooves 122 are formed in the isolation groove 122 located between two adjacent threaded holes 121, and an isolation strip 123 is formed between the two parallel isolation grooves 122. The isolation strip 123 is used to contact the lower side of the filter cover plate 2 to form a crimping surface, so as to avoid the problem of reduced filtering effect caused by signal source leakage.
[0020] As Figure 3 shown in the figure, the part of the partition plate 12 where the threaded holes 121 are provided is cylindrical, and the part between two adjacent threaded holes 121 is plate-shaped. Among them, the width of the plate-shaped part of the partition plate 12 is smaller than the diameter of the threaded hole 121. Therefore, while avoiding an increase in the crimping surface, it is possible to avoid insufficient torque of the fastening screw 3 and the problem that the installation quantity of the fastening screw 3 cannot provide an effective torque requirement due to insufficient space, so that the double-layer isolation groove 122 structure has the effect of effectively avoiding signal source leakage.
[0021] In summary, the present application provides a double-layer isolation groove structure. The double-layer isolation groove structure reduces the contact area with the filter cover plate 2 through the isolation groove 122, so that the filter cover plate 2 is tightly crimped with the upper layer of the partition plate 12 and the upper layer of the filter housing 1 under the action of the fastening screw 3, thereby improving the crimping effect between the filter cover plate 2 and the filter housing 1 and effectively avoiding the problem of reduced filtering effect caused by signal source leakage.
[0022] The "first", "second", "third", "fourth", etc. (if any) involved in this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, or devices.
[0023] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0024] Specific examples are used herein to elaborate on the principles and implementation manners of this application. The descriptions of the above embodiments are only for helping to understand the method and its core idea of this application. At the same time, for those of ordinary skill in the art, based on the idea of this application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.
Claims
1. A double-layer isolation groove structure, comprising a filter housing (1) and a filter cover plate (2) matching with the filter housing (1). A filter cavity (11) is arranged in the filter housing (1), and a partition plate (12) is arranged in the filter cavity (11). Fastening screws (3) for connecting and fixing are arranged between the filter cover plate (2) and one side of the outer periphery of the filter housing (1) as well as between the filter cover plate (2) and the partition plate (12). It is characterized in that: An isolation groove (122) and a plurality of threaded holes (121) matching and connecting with the fastening screws (3) are arranged on the upper side of the partition plate (12), and the isolation groove (122) is distributed between two adjacent threaded holes (121) and on one outer peripheral side of the threaded holes (121).
2. The double-layer isolation groove structure according to claim 1, characterized in that: A chamfer is arranged at the opening of the threaded hole (121), and the chamfer communicates with the isolation groove (122).
3. A double-layer isolation groove structure according to claim 1, characterized in that: Two isolation grooves (122) are formed between two adjacent threaded holes (121) and are parallel to each other, and an isolation band (123) is formed between the two isolation grooves (122).
4. A double-layer isolation groove structure according to claim 1, characterized in that: The part of the partition plate (12) where the threaded holes (121) are arranged is cylindrical, and the part between two adjacent threaded holes (121) is plate-shaped.
5. A double-layer isolation groove structure according to claim 4, characterized in that: The width of the plate-shaped part of the partition plate (12) is smaller than the diameter of the threaded hole (121).