CN201360357Y - Mica electric heating sheet - Google Patents

Mica electric heating sheet Download PDF

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Publication number
CN201360357Y
CN201360357Y CNU2008202065814U CN200820206581U CN201360357Y CN 201360357 Y CN201360357 Y CN 201360357Y CN U2008202065814 U CNU2008202065814 U CN U2008202065814U CN 200820206581 U CN200820206581 U CN 200820206581U CN 201360357 Y CN201360357 Y CN 201360357Y
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China
Prior art keywords
mica
insulating cover
sheet
electrode slice
electric heating
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Expired - Fee Related
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CNU2008202065814U
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Chinese (zh)
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程明
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Individual
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Individual
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Priority to CNU2008202065814U priority Critical patent/CN201360357Y/en
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Publication of CN201360357Y publication Critical patent/CN201360357Y/en
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Abstract

The utility model belongs to the technical field of electric heating. The utility model solves the problems that the oxidation between an electrode of an electric heater and an electric connecting part can causes poor contact, gradual increase of contact resistance, heat generating quantity increase, burnt electrode, and easy damage of the electrode when being touched or pulled by external force. The mica electric heating sheet comprises a sheet resistance belt (3) arranged between a first mica sheet (1) and a second mica sheet (2), wherein the first mica sheet (1), the second mica sheet (2) and the sheet resistance belt (3) are combined into a sheet body (22); a connecting hole (5) is formed on the first mica sheet (1); the connecting hole (5) is correspondingly formed on the connecting part (4) of the resistance belt (3); an electrode sheet (6) pasted on the connecting part (4) is arranged in the connecting hole (5); the electrode sheet (6) is fixed on the sheet body (22); and tin solders (9) are welded on the electrode sheet (6) and the connecting part (4). The utility model has good electric contact effect.

Description

The mica electric heating sheets
Technical field
The utility model belongs to the electric-heating technology field, is a kind of mica sheet that includes, the mica electric heating sheets of resistor disc.
Background technology
At Chinese patent, the patent No. 200420067475.4, name is called in the utility model patent specification of electric heater and discloses a kind of electric heater, include mica sheet, resistor disc, between described mica sheet and the mica sheet and and resistor disc between bond together by bonding agent, described mica sheet is provided with through hole, described resistor disc is provided with the electrical connection section that extends in the through hole, be provided with connecting hole between described through hole and the electrical connection section, described connecting hole is provided with the electrode that snaps onto on the electrical connection section, described electrode is to post therein the A sheet metal on the mica sheet and post B sheet metal on another mica sheet, the A sheet metal is provided with the fin that passes connecting hole, and the fin bending snaps onto on the B sheet metal, and electrical connection section is clamped between A sheet metal and the B sheet metal.The problem of its existence is because electrode is by A sheet metal and B sheet metal, and is to snap onto on the B sheet metal by the bending of the fin on the A sheet metal, and electrical connection section is clamped between A sheet metal and the B sheet metal.In use for some time, can produce oxidation gradually between A sheet metal and B sheet metal and the electrical connection section, cause loose contact, in the process of energising work, the contact resistance of contact site will constantly become greatly, and caloric value also will increase thereupon, finally cause the contact site of electrode to burn out.In addition, because electrical connection section is sandwiched between electrode A sheet metal and the B sheet metal, when electrode is subjected to the shake-up of external force or pulls, it is bad to be easy to make the electrical connection section of resistor disc to be drawn, and causes the contact site of electrode to burn out equally easily.
The utility model content
The purpose of this utility model is to provide between the connecting portion of a kind of electrode slice and resistive band and is connected closely electrode slice fixation, the non-damageable mica electric heating sheets of connecting portion.
For realizing the purpose of this utility model, described mica electric heating sheets, comprise the laminar resistive band that is arranged between first mica sheet and second mica sheet, described first mica sheet, second mica sheet, laminar resistive band are combined into plates, on described first mica sheet, be provided with connecting hole, described connecting hole correspondence is arranged on the connecting portion of resistive band, be provided with the electrode slice that is attached on the connecting portion in the described connecting hole, described electrode slice is fixed on the plates, is welded with scolding tin on described electrode slice and the connecting portion.
Because electrode slice wherein is fixed on the plates, connecting portion is difficult for because of the shake-up of electrode slice or tears and damage.In addition owing to there is scolding tin to be welded on electrode slice and the connecting portion, strengthened the constant intensity of electrode slice on the one hand, make being connected between electrode slice and the connecting portion not have the gap on the other hand, therefore long-term energising work does not have air between the connecting portion of electrode slice and resistive band, can not produce oxidation, non-contact resistance, be difficult for heating, mechanical connection is firm, has the good electrical contact effect.Solved that electrode slice only is attached on the connecting portion of resistive band in the prior art, electrode slice is subjected to cold and hot variation easily in long-term use, loose contact between electrode slice and the connecting portion, and surface both is easy to generate oxidation, cause contact resistance to increase gradually, the problem of being burnt especially easily, this structure long service life.
Description of drawings
The drawing of accompanying drawing is described as follows:
Fig. 1 for electrode slice among the utility model mica electric heating sheets embodiment 1, be compounded in laminar resistive band and electrode slice installation pre-structure figure between first mica sheet and second mica sheet.
Fig. 2 is a kind of structure chart that first insulating cover among the utility model mica electric heating sheets embodiment 1 combines with second insulating cover.
Fig. 3 is the another kind of structure chart that first insulating cover among the utility model mica electric heating sheets embodiment 1 combines with second insulating cover.
Fig. 4 is the A-A cutaway view among Fig. 2.
Fig. 5 installs pre-structure figure for the laminar resistive band and the electrode slice that are electrode slice among the utility model mica electric heating sheets embodiment 2, are compounded between first mica sheet and second mica sheet.
Fig. 6 is a kind of structure chart that first insulating cover among the utility model mica electric heating sheets embodiment 2 combines with second insulating cover.
Fig. 7 is the another kind of structure chart that first insulating cover among the utility model mica electric heating sheets embodiment 2 combines with second insulating cover.
Fig. 8 is the B-B cutaway view among Fig. 6.
Fig. 9 is the electrode slice vertical view among Fig. 5.
Figure 10 is the C-C cutaway view among Fig. 9.
Figure 11 is the electrode slice right view among Fig. 9.
Figure 12 is the metal intermediate plate vertical view among Fig. 5.
Figure 13 is the metal intermediate plate D-D cutaway view among Figure 12.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the utility model mica electric heating sheets is described in further detail:
Embodiment 1, shown among the figure 1,2,3,4, this mica electric heating sheets, comprise first mica sheet 1, second mica sheet 2, laminar resistive band 3, laminar resistive band 3 are arranged between first mica sheet 1 and second mica sheet 2, be bonded togather mutually by bonding agent 20, be formed into plates 22.The mica electric heating sheets is mainly used in the electric heater, therefore, need be designed to the large-area ultrathin laminated structure, so that with air big as far as possible contact area is arranged under the situation of certain electrical power.So selecting mica sheet thickness for use is 0.15～0.50mm, resistive band thickness is 0.015～0.055mm.Because three's thickness is all very thin, the thickness that is combined with each other machinery, resistance to compression, tension, resists and rolls over equal strength and all be subjected to certain restriction also just about 1mm.Wiring according to power line on first mica sheet 1 requires to be provided with circular connecting hole 5, and circular connecting hole 5 can have two, three, even more, and present embodiment has two circular connecting holes 5.Connecting hole 5 correspondences are arranged on the connecting portion 4 of resistive band 3.This connecting portion 4 is exactly that resistive band 3 exposes part in connecting hole 5, and its thickness is the same with resistive band.Be provided with electrode slice 6 in the connecting hole 5, this electrode slice 6 is to be made by copper sheet.Electrode slice 6 comprises a circular ring plate, as shown in FIG., and extends out from circular ring plate and to be used for the engaging lug (not shown) that is connected with other electrical connectors (perhaps power line).Be provided with one section resistive band between per two electrode slices, a plurality of electrode slices are with regard to corresponding multistage resistive band because electrode slice is exposed at outside the plates 22, by serial connection or and the receiving electrode sheet, can realize the multiple combination of resistive band.
Electrode slice 6 with and corresponding connecting portion 4, second mica sheet 2 be provided with riveted holes 7, be provided with the hollow tubular copper rivet 8 that electrode slice 6, connecting portion 4, second mica sheet 2 are riveted together in the riveted holes 7, be welded with scolding tin 9 on electrode slice 6 and the connecting portion 4.The fusion temperature of scolding tin is more than 200 ℃, though connecting portion has resistance since with combine by scolding tin and copper electrode slice, so this one can not generate heat, in use, scolding tin can not melt.
Scolding tin 9 is arranged on the contact-making surface 10 between electrode slice 6 and the connecting portion 4.Make electrode slice 6 can have bigger area to stick on the connecting portion 4 on the one hand, make that the combination of electrode slice 6 on connecting portion 4 is firm.On the other hand, even the environment for use temperature is too high, so that melts soldering tin, scolding tin can not be between electrode slice 6 and the connecting portion 4 from flowing out between electrode slice 6 and the connecting portion 4 all the time yet, still plays the good electrical contact effect.Rivet makes electrode slice and connecting portion relative fixed, increase both mechanical connection intensity, scolding tin then increases both electrical connection effects, make both keep for a long time almost non-contact resistance connection status, avoided prior art oxidation can take place on long-time rear electrode sheet and resistive band 3 surfaces of using, thereby the generation contact resistance causes loose contact and the shortcoming of burning.
Second mica sheet 2 is provided with metal washer sheet 11, and rivet 8 is riveted on the washer plate 11.Washer plate 11 sizes can be decided according to the thickness and the intensity of mica sheet, if mica sheet is very thin, then the diameter of washer plate 11 can be designed to greatly relatively, so that with mica sheet big contact area is arranged, prevents that electrode slice is subjected to external force and touches or pull and make the mica sheet local damage.
First mica sheet 1 is provided with first insulating cover 13 that covers electrode slice 6, second mica sheet 2 is provided with second insulating cover 14, flaring 15 corresponding clips of first insulating cover 13 and second insulating cover 14 are on the lateral surface 16 of first mica sheet 1 and second mica sheet 2, first mica sheet 1 is provided with through hole 12, the first insulating covers 13 and second insulating cover 14 that pass on second mica sheet 2 and combines by through hole 12.Because insulating cover is clipped in the both sides of two mica sheets, can cover the current-carrying part that is connected with electrode slice on the one hand, prevent to get an electric shock.On the other hand, because insulating cover has certain rigid, be clipped in area that the both sides of two mica sheets occupy contact area much larger than electrode slice, can stop shake-up out-of-bounds or pull power, the shake-up out-of-bounds or the power of pullling are distributed on the flaring, be added on the mica sheet by flaring, the external force that mica sheet is subjected to reduces greatly, can avoid the damage of electrode slice effectively.During use, after can being connected on external cord on the electrode slice, external cord is fixed on the insulating cover, perhaps external cord is made a call to a knot, this knot is acted on the inboard, line hole of insulating cover, just pullling of external cord can not act directly on the electrode slice at this moment, thereby avoids the effect that often is subjected to external force of electrode slice, and the relative stress that reduces greatly between electrode slice and the connecting portion changes.
As shown in Fig. 2,3, be provided with joint pin 17, the first insulating covers 13 and second insulating cover 14 that pass through hole 12 between first insulating cover 13 and second insulating cover 14 and be fixed on the joint pin 17.The length of joint pin is fit to, and can guarantee that two insulating covers have suitable power and are clipped on the outside of mica sheet.
As shown in Figure 2, joint pin 17 is connected on second insulating cover 14, and first insulating cover, 13 medial roof are in joint pin 17 ends, and first insulating cover 13 is provided with the screw 18 that is tightened in the joint pin 17.During manufacturing, second insulating cover 14 that has joint pin can be inserted in the through holes and be attached to a side of mica sheet, first insulating cover, 13 correspondences be covered on the opposite side of mica sheet again, trip bolt gets final product, and is convenient for assembly.
As shown in Figure 3, joint pin 17 ends are provided with the plastics die 19 of riveting on first insulating cover 13.The plastics die is the pillar-shaped structure before making, and can penetrate in the connecting hole inside of first insulating cover 13, again the plastics die fusing formation mushroom of pillar-shaped is fixed first insulating cover 13.
Be provided with sealing gasket 21 between flaring 15 and the lateral surface 16, can prevent that sealing is from flowing between flaring 15 and the lateral surface 16.
Embodiment 2, and as shown in Fig. 5,6,7,8, this mica electric heating sheets plates 22 are provided with fixing hole 23, and fixing hole 23 is arranged on can avoid plates 22 positions that resistive band 3 distributes.2 of second mica sheets are provided with square metal (as: stainless steel) intermediate plate 24, and as shown in Fig. 5,12,13, the side of this metal intermediate plate 24 is provided with the folder ear 25 that two pairs of punching presses form, and assembling fore-clamp ear 25 becomes an angle of 90 degrees with the plane of intermediate plate 24.Intermediate plate 24 passes fixing hole 23 back bendings and is clipped on the limit of electrode slice 6.Because the thickness of mica sheet, resistive band is extremely thin, causes plates 22 extremely thin.Therefore the bonded area between electrode slice 6 and the plates 22 is big more, plates 22 are subjected to can being dispersed in bigger area position from the effect of electrode slice 6 active forces, local pressure is little, the chance of damaging is also just more little, the external force that electrode slice 6 is born is also just big more, is difficult for being damaged when wiring is assembled.Electrode slice 6 areas are big more, and radiating effect is good more, and easy burn-out not.
As shown in Fig. 5,9,10,11, electrode slice 6 middle parts are provided with the scolding tin hole 26 that passes to connecting portion 4, and scolding tin 9 is welded on connecting portion 4 and scolding tin hole 26 peripheries.Because electrode slice 6 is provided with scolding tin hole 26, in making assembling process, can earlier electrode slice 6 be fixed on the plates 22, scolding tin on connecting portion 4 again, and make scolding tin be combined in the periphery in scolding tin hole 26.This moment, connecting portion 4 had tin with scolding tin hole 26 peripheries, had good electrical connection effect between the two, even temperature is too high, made the tin fusing, tin still can angle attached to connecting portion 4 and scolding tin hole 26 between, can not influence the effect of electrical connection.Treat that temperature reduces, tin solidifies to remain and is welded between connecting portion 4 and the scolding tin hole 26.
Because mica sheet has certain thickness, when being 0.5mm, when the area of electrode slice 6 at the bottom of can't falling into the hole time, can be provided with the lug boss 27 that protrudes into greater than connecting hole 5 in electrode slice 6 middle parts in connecting hole 5 as thickness.Be square as connecting hole 5, electrode slice 6 middle parts are provided with the square lug boss 27 to connecting portion 4 directions.Lug boss 27 sinks in connecting hole 5, and its end face can touch connecting portion 4, perhaps almost touches connecting portion 4.Can reduce the distance between electrode slice 6 surfaces to connecting portion 4 surfaces like this, after electrode slice 6 and connecting portion 4 surfaces scribble one deck scolding tin, both easier contacts, welded together easily.

Claims (12)

1. mica electric heating sheets, comprise the laminar resistive band (3) that is arranged between first mica sheet (1) and second mica sheet (2), described first mica sheet (1), second mica sheet (2), laminar resistive band (3) is combined into plates (22), it is characterized in that on described first mica sheet (1), being provided with connecting hole (5), described connecting hole (5) correspondence is arranged on the connecting portion (4) of resistive band (3), be provided with the electrode slice (6) that is attached on the connecting portion (4) in the described connecting hole (5), described electrode slice (6) is fixed on the plates (22), is welded with scolding tin (9) on described electrode slice (6) and the connecting portion (4).
2. mica electric heating sheets according to claim 1, it is characterized in that described electrode slice (6) with and corresponding connecting portion (4), second mica sheet (2) be provided with riveted holes (7), described second mica sheet (2) is provided with washer plate (11), be provided with rivet (8) in the described riveted holes (7), described rivet (8) is riveted together electrode slice (6), connecting portion (4), second mica sheet (2) and washer plate (11).
3. mica electric heating sheets according to claim 1, it is characterized in that described plates (22) are provided with fixing hole (23), described second mica sheet (2) face is provided with metal intermediate plate (24), described metal intermediate plate (24) is provided with at least one pair of folder ear (25), and described folder ear (25) passes fixing hole (23) and is clipped on the electrode slice (6).
4. mica electric heating sheets according to claim 3 is characterized in that described electrode slice (6) middle part is provided with the scolding tin hole (26) that passes to connecting portion (4), and described scolding tin (9) is welded on connecting portion (4) and scolding tin hole (26) periphery.
5. according to claim 1,2,3 or 4 described mica electric heating sheets, it is characterized in that described scolding tin (9) is arranged on the contact-making surface (10) between electrode slice (6) and the connecting portion (4).
6. according to claim 1,2,3 or 4 described mica electric heating sheets, it is characterized in that described electrode slice (6) middle part is provided with the lug boss (27) that protrudes in connecting hole (5).
7. according to claim 1,2,3 or 4 described mica electric heating sheets, it is characterized in that described first mica sheet (1) is provided with first insulating cover (13) that covers electrode slice (6), described second mica sheet (2) is provided with second insulating cover (14), flaring (15) corresponding clip of described first insulating cover (13) and second insulating cover (14) is on the lateral surface (16) of first mica sheet (1) and second mica sheet (2), described first mica sheet (1) is provided with the through hole (12) that passes on second mica sheet (2), and described first insulating cover (13) and second insulating cover (14) combine by through hole (12).
8. mica electric heating sheets according to claim 7, it is characterized in that being provided with between described first insulating cover (13) and second insulating cover (14) joint pin (17) that passes through hole (12), described first insulating cover (13) is fixed on the joint pin (17) with second insulating cover (14).
9. mica electric heating sheets according to claim 8, it is characterized in that described joint pin (17) is connected on second insulating cover (14), described first insulating cover (13) medial roof is in joint pin (17) end, and described first insulating cover (13) is provided with the screw (18) that is tightened in the joint pin (17).
10. mica electric heating sheets according to claim 8, it is characterized in that described joint pin (17) is connected on second insulating cover (14), described first insulating cover (13) medial roof is in joint pin (17) end, and described joint pin (17) end is provided with the plastics die (19) of riveting on first insulating cover (13).
11. according to claim 1,2,3 or 4 described mica electric heating sheets, it is characterized in that described mica sheet thickness is 0.15～0.50mm, described resistive band thickness is 0.015～0.055mm.
12. mica electric heating sheets according to claim 7 is characterized in that being provided with sealing gasket (21) between described flaring (15) and the lateral surface (16).
CNU2008202065814U 2008-12-31 2008-12-31 Mica electric heating sheet Expired - Fee Related CN201360357Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008202065814U CN201360357Y (en) 2008-12-31 2008-12-31 Mica electric heating sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008202065814U CN201360357Y (en) 2008-12-31 2008-12-31 Mica electric heating sheet

Publications (1)

Publication Number Publication Date
CN201360357Y true CN201360357Y (en) 2009-12-09

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ID=41426121

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008202065814U Expired - Fee Related CN201360357Y (en) 2008-12-31 2008-12-31 Mica electric heating sheet

Country Status (1)

Country Link
CN (1) CN201360357Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107348833A (en) * 2017-08-08 2017-11-17 广东美想电器有限公司 A kind of electric cooker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107348833A (en) * 2017-08-08 2017-11-17 广东美想电器有限公司 A kind of electric cooker
CN107348833B (en) * 2017-08-08 2023-01-31 广东美想电器有限公司 Electric rice cooker

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20091209

Termination date: 20101231