A dielectric filter having a metal housing

Abstract

The application discloses a dielectric filter with a metal shell, which comprises a metal shell, a left fixed plate, a right fixed plate, a metal cover plate, a left clamping piece for pressing the left fixed plate on the left end of the metal shell and extending to the top of the metal cover plate to form a left clamping head, a right clamping piece for pressing the right fixed plate on the right end of the metal shell and extending to the top of the metal cover plate to form a right clamping head, a wedge-shaped block between the left clamping head and the right clamping head and used for pressing the metal cover plate on the top end of the metal shell, and a fastener used for locking the left clamping head, the wedge-shaped block and the right clamping head together. The dielectric filter with the metal shell has high suppression degree and good heat conduction performance; only one bolt and nut need to be screwed to simultaneously complete fastening connection of the left fixed plate, the right fixed plate, the metal cover plate and the metal shell; and the dielectric filter is more convenient to disassemble and assemble.

Description

Technical Field

[0001] This invention relates to a dielectric filter with a metal housing. Background Technology

[0002] Chinese patent application number 202123335304.8 discloses a dielectric filter with a metal shell, which has high suppression and good thermal conductivity.

[0003] The dielectric filter of this patent includes: a metal shell placed horizontally in the left-right direction, a vertical left fixing plate located at the left end of the metal shell, a horizontal left connector located on the left side of the left fixing plate, a vertical right fixing plate located at the right end of the metal shell, a horizontal right connector located on the right side of the right fixing plate, a horizontal metal cover plate located at the top of the metal shell, a filter body located inside the metal shell, and a protrusion and a heat-conducting block located on the bottom surface of the metal cover plate and connected to the filter body; the left fixing plate is detachably connected to the left end of the metal shell by four bolts; the right fixing plate is detachably connected to the right end of the metal shell by four bolts; and the metal cover plate is detachably connected to the top of the metal shell by four bolts.

[0004] Although the dielectric filter of this patent has high suppression and good thermal conductivity, the assembly of the dielectric filter requires four bolts each for the left fixing plate, right fixing plate and metal cover plate to be fixed to the metal shell, for a total of twelve bolts. Therefore, the assembly and disassembly of the dielectric filter is inconvenient and needs improvement. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a dielectric filter with a metal casing, comprising: a metal casing placed horizontally along the left-right direction; a vertically positioned left fixing plate located at the left end of the metal casing; a horizontally positioned left connector located on the left side of the left fixing plate; a vertically positioned right fixing plate located at the right end of the metal casing; a horizontally positioned right connector located on the right side of the right fixing plate; a horizontally positioned metal cover plate located at the top of the metal casing; a filter body located inside the metal casing; and protrusions and guides located on the bottom surface of the metal cover plate and connected to the filter body. The components include a hot block, a left clamping piece that presses the left fixing plate against the left end of the metal housing and extends upwards to directly above the metal cover plate to form a left clamp, a right clamping piece that presses the right fixing plate against the right end of the metal housing and extends upwards to directly above the metal cover plate to form a right clamp, a wedge-shaped block located between the left and right clamps and pressing the metal cover plate against the top of the metal housing, and a fastener that locks the left clamp, wedge-shaped block, and right clamp together; the wedge-shaped block has a smaller upper end and a larger lower end, and the left and right clamps respectively form a wedge engagement with the wedge-shaped block.

[0006] For details regarding the dielectric filter of this invention, please refer to the specific embodiments.

[0007] The advantages and beneficial effects of this invention are as follows: it provides a dielectric filter with a metal shell, which has high suppression and good thermal conductivity; and only one bolt and nut are needed to simultaneously complete the fastening connection between the left fixing plate, the right fixing plate, the metal cover plate and the metal shell; making the assembly and disassembly of the dielectric filter more convenient.

[0008] During installation of the dielectric filter of this invention, the left and right clamps form a wedge fit with the wedge block, which is smaller at the top and larger at the bottom. The through hole on the wedge block for the bolt is a horizontally penetrating and vertically extending strip-shaped hole. Therefore, during the process of tightening the nut to lock the left clamp, wedge block, and right clamp with the bolt through them together, the left and right clamps will move closer to each other and press the wedge block downwards. Consequently, the clamping of the left and right clamps will become increasingly tight, eventually clamping and fixing the left and right fixing plates to the left and right ends of the metal shell. At the same time, the wedge block will also press downwards more and more tightly, eventually pressing and fixing the metal cover plate to the top of the metal shell. Thus, by tightening only one bolt and nut, the fastening connection of the left and right fixing plates, the metal cover plate, and the metal shell can be completed simultaneously.

[0009] This invention is a partial improvement on the dielectric filter disclosed in Chinese Patent Application No. 202123335304.8. The main improvement is the elimination of four bolts detachably connecting the left fixing plate to the left end of the metal housing, four bolts detachably connecting the right fixing plate to the right end of the metal housing, and four bolts detachably connecting the metal cover plate to the top of the metal housing. Instead, only one bolt and nut are used to simultaneously secure the left fixing plate, right fixing plate, metal cover plate, and metal housing. Therefore, this invention reduces the number of bolts to one-twelfth of the original, greatly facilitating the assembly and disassembly of the dielectric filter. This invention does not improve other parts of the patent; other parts of the dielectric filter can be found in the patent's specification and will not be repeated here. Attached Figure Description

[0010] Figure 1 This is a front view schematic diagram of a dielectric filter; Figure 2 This is a schematic diagram of the dielectric filter from the left. Figure 3 This is a right-side schematic diagram of a dielectric filter; Figure 4 This is a top view of a dielectric filter. Implementation

[0011] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0012] The specific technical solution of this invention is as follows: like Figures 1 to 4 As shown, a dielectric filter with a metal casing 1 includes: a metal casing 1 placed horizontally in the left-right direction; a vertical left fixing plate 31 located at the left end of the metal casing 1; a horizontal left connector 41 located on the left side of the left fixing plate 31; a vertical right fixing plate 32 located at the right end of the metal casing 1; a horizontal right connector 42 located on the right side of the right fixing plate 32; a horizontal metal cover plate 9 located at the top of the metal casing 1; a filter body located inside the metal casing 1; a protrusion and a heat-conducting block located on the bottom surface of the metal cover plate 9 and connected to the filter body; and a mechanism that presses the left fixing plate 31 against the left end of the metal casing 1 and extends upwards to directly above the metal cover plate 9. The structure includes a left clamping piece 100 forming a left clamp 104, a right clamping piece 200 pressing the right fixing plate 32 against the right end of the metal housing 1 and extending upwards to directly above the metal cover plate 9 to form a right clamp 204, a wedge block 300 located between the left clamp 104 and the right clamp 204 and pressing the metal cover plate 9 against the top of the metal housing 1, a fastener locking the left clamp 104, the wedge block 300, and the right clamp 204 together, and a flat heat dissipation plate 400 provided on the top surface of the wedge block 300; the wedge block 300 is smaller at the top and larger at the bottom, and the left clamp 104 and the right clamp 204 respectively form a wedge engagement with the wedge block 300; The fastener includes: a bolt 501 that passes through the left collet 104, the wedge block 300, and the right collet 204 in a left-right direction, and a nut 502 that is threadedly connected to the bolt 501 and locks the left collet 104, the wedge block 300, and the right collet 204 together; there is only one bolt 501 and one nut 502; the left collet 104 is provided with a left through hole 105 for the bolt 501 to pass through, the wedge block 300 is provided with a central through hole 301 for the bolt 501 to pass through, and the right collet 204 is provided with a right through hole 205 for the bolt 501 to pass through; and the left through hole 105 and the right through hole 205 are both horizontally through round holes, and the central through hole 301 is a horizontally through and vertically extending strip hole; The wedge block 300 is an insulating and heat-conducting block; the wedge block 300 is placed horizontally in the front-back direction, and the bottom and top surfaces of the wedge block 300 are horizontal. The left side of the wedge block 300 is a right-leaning inclined surface, and the right side of the wedge block 300 is a left-leaning inclined surface. The left and right sides of the wedge block 300 are symmetrically arranged (i.e., the cross-sectional shape of the wedge block 300 is an isosceles trapezoid); the bottom surface of the wedge block 300 abuts against the top surface of the metal cover plate 9; the central through hole 301 is placed horizontally in the left-right direction, and the central through hole 301 penetrates the left and right sides of the wedge block 300. The left clip 100 is an insulating and heat-conducting sheet; the left clip 100 includes: a flat first lower horizontal piece 101 whose top surface abuts against the left end of the bottom surface of the metal shell 1; a pair of vertical first side vertical pieces 102 whose bottom end is integrally connected to the left end of the first lower horizontal piece 101, whose right side surface abuts against the left side surface of the left fixing plate 31 and are respectively disposed on the front and rear sides of the left connector 41; a flat first upper horizontal piece 103 located above the metal cover plate 9, to the left of the wedge block 300, and whose left end is integrally connected to the top end of the pair of first side vertical pieces 102; and a left bottom end integrally connected to the right end of the first upper horizontal piece 103. The left chuck 104 is horizontally positioned along the front-to-back direction, with its bottom and top surfaces being horizontal, its left side being vertical, and its right side being an inclined surface tilted to the right (i.e., the cross-sectional shape of the left chuck 104 is an inverted right trapezoid). The right side of the left chuck 104 abuts against the left side of the wedge block 300, and the right side of the left chuck 104 and the left side of the wedge block 300 form a wedge fit. The left through hole 105 is horizontally positioned along the left-to-right direction, and the left through hole 105 penetrates the left and right sides of the left chuck 104. The right clip 200 is an insulating heat-conducting sheet; the right clip 200 includes: a flat second lower horizontal piece 201 whose top surface abuts against the right end of the bottom surface of the metal shell 1; a pair of vertical second side vertical pieces 202 whose bottom end is integrally connected to the right end of the second lower horizontal piece 201, whose left side surface abuts against the right side surface of the right fixing plate 32 and are respectively disposed on the front and rear sides of the right connector 42; a flat second upper horizontal piece 203 located above the metal cover plate 9, located to the right of the wedge block 300, and whose right end is integrally connected to the top of the pair of second side vertical pieces 202; and a right bottom end integrally connected to the left end of the second upper horizontal piece 203. The right chuck 204 is horizontally positioned along the front-to-back direction, with its bottom and top surfaces being horizontal, its right side being vertical, and its left side being an inclined surface tilting to the left (i.e., the cross-sectional shape of the right chuck 204 is an inverted right trapezoid). The left side of the right chuck 204 abuts against the right side of the wedge block 300, and the left side of the right chuck 204 and the right side of the wedge block 300 form a wedge fit. The right through hole 205 is horizontally positioned along the left-to-right direction, and the right through hole 205 penetrates the left and right sides of the right chuck 204.

[0013] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dielectric filter with a metal housing, comprising: A horizontally placed metal shell, a vertically placed left fixing plate at the left end of the metal shell, a horizontally placed left connector on the left side of the left fixing plate, a vertically placed right fixing plate at the right end of the metal shell, a horizontally placed right connector on the right side of the right fixing plate, and a horizontally placed metal cover plate at the top of the metal shell; characterized in that it further includes: a left clamping piece that presses the left fixing plate against the left end of the metal shell and extends upward to directly above the metal cover plate to form a left clamp, a right clamping piece that presses the right fixing plate against the right end of the metal shell and extends upward to directly above the metal cover plate to form a right clamp, a wedge-shaped block located between the left and right clamps and pressing the metal cover plate against the top of the metal shell, and a fastener that locks the left clamp, the wedge block, and the right clamp together; the wedge block has a smaller upper end and a larger lower end, and the left and right clamps respectively form a wedge fit with the wedge block; The fastener includes: a bolt that passes through the left collet, wedge block, and right collet in a left-right direction, and a nut that is threadedly connected to the bolt and locks the left collet, wedge block, and right collet together; the left collet has a left through hole for the bolt to pass through, the wedge block has a central through hole for the bolt to pass through, and the right collet has a right through hole for the bolt to pass through; and the left through hole and the right through hole are both horizontally penetrating round holes, and the central through hole is a horizontally penetrating and vertically extending strip hole.

2. The dielectric filter with a metal casing according to claim 1, characterized in that, The wedge block is placed horizontally in the front-to-back direction, with its bottom and top surfaces also being horizontal. The left side of the wedge block is a rightward inclined surface, and the right side is a leftward inclined surface. The bottom surface of the wedge block abuts against the top surface of the metal cover plate. The central through hole is placed horizontally in the left-to-right direction and penetrates both the left and right sides of the wedge block.

3. The dielectric filter with a metal casing according to claim 2, characterized in that, The left clamp includes: a flat first lower horizontal piece whose top surface abuts against the left end of the bottom surface of the metal shell; a pair of vertical first side vertical pieces whose bottom end is integrally connected to the left end of the first lower horizontal piece and whose right side surface abuts against the left side surface of the left fixing plate and are respectively disposed on the front and rear sides of the left connector; a flat first upper horizontal piece located above the metal cover plate, to the left of the wedge block, and whose left end is integrally connected to the top of the pair of first side vertical pieces; and a left clamp whose left bottom end is integrally connected to the right end of the first upper horizontal piece; the left clamp is flat along the front-back direction, and the bottom and top surfaces of the left clamp are flat, the left side surface of the left clamp is vertical, and the right side surface of the left clamp is a rightward inclined surface; the right side surface of the left clamp and the left side surface of the wedge block form a wedge fit; the left through hole is flat along the left-right direction, and the left through hole penetrates the left side surface and the right side surface of the left clamp.

4. The dielectric filter with a metal casing according to claim 2, characterized in that, The right clamp includes: a second lower horizontal piece with its top surface abutting against the right end of the bottom surface of the metal shell; a pair of vertical second side pieces with their bottom end integrally connected to the right end of the second lower horizontal piece and their left side abutting against the right side of the right fixing plate and respectively located on the front and rear sides of the right connector; a second upper horizontal piece with its right end integrally connected to the top of the pair of second side pieces, located above the metal cover plate and to the right of the wedge block; and a right clamp with its right bottom end integrally connected to the left end of the second upper horizontal piece. The right clamp is horizontal in the front-back direction, with its bottom and top surfaces being horizontal, its right side being vertical, and its left side being an inclined surface tilted to the left. The left side of the right clamp and the right side of the wedge block form a wedge fit. The right through hole is horizontal in the left-right direction and penetrates the left and right sides of the right clamp.

5. The dielectric filter with a metal casing according to claim 2, characterized in that, The left and right sides of the wedge are symmetrically arranged.

6. The dielectric filter with a metal casing according to claim 1, characterized in that, The wedge-shaped block is an insulating and heat-conducting block.

7. The dielectric filter with a metal casing according to claim 1, characterized in that, Also includes: A flat heat dissipation plate is placed on the top surface of the wedge-shaped block.

8. The dielectric filter with a metal casing according to claim 1, characterized in that, The left clip is an insulating and heat-conducting sheet.

9. The dielectric filter with a metal casing according to claim 1, characterized in that, The right clip is an insulating and heat-conducting sheet.

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