CA1216037A - Slipping connector assembly for microwave oven application - Google Patents
Slipping connector assembly for microwave oven applicationInfo
- Publication number
- CA1216037A CA1216037A CA000438990A CA438990A CA1216037A CA 1216037 A CA1216037 A CA 1216037A CA 000438990 A CA000438990 A CA 000438990A CA 438990 A CA438990 A CA 438990A CA 1216037 A CA1216037 A CA 1216037A
- Authority
- CA
- Canada
- Prior art keywords
- microwave oven
- contact
- food
- mobile
- contacts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6408—Supports or covers specially adapted for use in microwave heating apparatus
- H05B6/6411—Supports or covers specially adapted for use in microwave heating apparatus the supports being rotated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/023—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples provided with specially adapted connectors
-
- G—PHYSICS
- G12—INSTRUMENT DETAILS
- G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
- G12B17/00—Screening
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Electric Ovens (AREA)
- Resistance Heating (AREA)
Abstract
Abstract of the Disclosure Disclosed is a slipping connector assembly par-ticularly useful in a microwave oven. The slipping con-nector assembly, which is connected to the output terminals of a temperature-sensing probe that detects the tempera-ture of food being cooked on a turntable of a microwave oven, is provided with mobile contacts connected to the output terminals and stationary contacts that come into contact with the mobile contacts; the contact points be-tween the mobile and stationary contacts being completely shielded by a shielding case. Since the contact points between the mobile and stationary contacts are shielded by the shielding ease, the contact points remain free from oil and other cooking residues, thus resulting in improved performance and reliability of the slipping connector assembly.
Description
~Z~6~
The present invention re]ates to a slipping con-nector particularly adapted for installation on the oven ceiling that supports the food temperature sensing probe of a microwave oven which incorporates a turntable.
To uniformly heat food microwave ovens often use a -turntable in the cooking chamber and detect the tempera-ture of food during cooking via a temperature-sensing probe in contact with the food, so that the heating can be controlled in response to the temperature detected.
Such a microwave oven usually utilizes a tempera-ture sensing probe in contact with the food which probe rotates along with the turntable, while the output termin-als of the temperature-sensing probe are connected to a slipping connector that is secured to the ceiling of the microwave oven. The food temperature is detected during cooking by ~he electrically-connected slipping connector and the control circuit of the microwave oven unit.
In conventional prior art slipping connectors, for example the one disclosed in U.S. Patent 4,149,056, "Microwave Oven With Food Temperature Means", the contact points between the mobile and stationary contacts of the slipping connector assembly are exposed to the surrounding oven atmosphere containing oil and other impurities inside the microwave oven cavity, and so if the microwave oven was ùsed for a long time contacts of both the mobile and stationary contact devices will become stained by oil and other residues which arise from the food being cooked. In other words, contact resistance between the mobile and stationary contacts will eventually increase after the temperature-sensing probe has been used for a time, thus causing the contacts to malfunction so that food tempera-ture can not be detected accurately or at all during cook-ing.
In light of the disadvantage described above, the present invention provides a slipping connector that inhibits growth of contact resistance even after use of the temperature-sensing probe for a long time.
6Q,37 More particularly, the present invention provides in a microwave oven which utilizes a turntable to rotate food being cooked in a cooking chamber and a temperature sensing probe in contact with the food, output terminals oE the probe being connected to a slipping connector assembly, the slipping connector assembly comprising, a slip connector including mobile contacts connected to the output terminals of the temperature sensing probe ancl stat;orlary contacts having continuous points oE contact witll the mobile contacts and with a control circuit of the microwave oven, and an alr-tight shielding case that shields the points of contact between the mobile and stationary contacts of the slip connector from the atmosphere inside the cooking chamber of the oven, the stationary contacts being supported by the shielding case.
The invention further provides a microwave oven for cooking food which uses a turntable in a cooking chamber and detects temperature of the food during cooking via a temperature sensing probe in contact with food so as to control heating of the food in response to the temperatuee detected comprising, a turntable included in a microwave oven chamber so that the food is cooked and rotated therein, a food temperature-sensing probe for monitoring the temperature of the food placed in the microwave oven chamber for cooking purposes, a slip connector including mobile contacts connected to output terminals of the temperature sensing probe and stationary contacts connected to a control circuit of the microwave oven and having continuous points of contact with the mobile contacts, and an air-tight shielding case which shields or seals the points of contact between the stationary contacts and the mobile contacts and the connection to the control circuit of the slip connector from the atmosphere inside the cooking chamber of the oven, the stationary contacts being supported by the shielding case.
lZlG037 The present invention will become better understood from tile detailed descr:iption of an embodiment thereof given hereafter whicll is included by way of illustration only and is not limitative oE the present invention, and the accompanying drawings in which:
Figure l is a plan view of a slipping connector in accordance Witll one embodiment of the present invention.
Figure 2 is a sectional view ta~n along l ine A
- A of the slipp,ing connector assembly silown in Figure ls and Figure 3 is a sectional view of a slipping connector according to another preferred embodiment oE the present invention.
Figures l and 2 respectively show a plan and an ~-~ sectional view of a sl.ipping connector assembly in accordance with a preEerred embodiment oE the present invention.
A cylindrical relay jack 3, which has a cylindrical lid 2 that is provided with concentric holes, is coupled to a cylindrical choke unit l in an upright position. The cylindrical relay jack 3 incorporates a flange-type mobile contact at one end which is supported by a bearing 5 set in the circumference oE the hole of sleeve 4 which is in the inner wall of a lower part of the choke unit 1, and also by the lid 2.
~ mobile contact 6a and another mobile contact 7a are respectively installed concentrically to the upper position of relay jack 3 via an insulator 8. The contact surface of mobile contact 6a is in the level identical to the contact surface of the other mobile contact 7a, which is itself tightly inserted into the inner surface of relay jack 3 via the cylindrical insulator 8.
The lower parts of mobile contacts 6a and 7a respectively are provided with terminals 6b and 7b that are in contact with the output terminals of the temperature sensing probe (not illustrated). A stationary contact base 9 that secures both stationary contact ~21~37 components 11 and 12 makes up an air-tight case which tightly shields the contact points between the mobile contacts 6a and 7a, while the stationary contact base 9 is secure~ to the microwave oven (not illustrated) by two screws lD.
Stationary contact components 11 and 12 are rnade of phosphorated bronze plates each being provided with conductivity and ~n optimum elasticity, which are secured to the stationary contact base 9 b~ holdfast units 13.
The stationary contact base 9 provides holes 9a and 9b, through which the stationary contact components 11 and 12 pass. To ensure the shielding effect at these holes, the stationary contact base 9 is made of an insulating material having an expansion rate identical to that of the phosphorated bron~e plates.
The stationary contact components 11 and 12 are of the identical structure where the contact parts of these respectively come into contact with the mobile contacts 6a and 7a. For example, stationary contact part 12 is composet~ oE so-called carbon brush having its stationary contact 12a in contact with the mobile contact 7a which is composed oE annealed carbon lump. A spring 12b that presses the mobile contact 7a for contact operation is provided in a position near the center of the stationary contact component 12. A terminal 12c, which is connected to the control circuit of the microwave oven (not illustrated), is extended from a stationary part secured by holdfast unit 13. The other stationary contact component 11 has a structure identical to stationary contact cornponent 120 Stationary contact point 12a of stationary contact component 12 is in a position near the center of the sliding part of a circular plane of mobile contact 7a, while the stationary contact tnot illustrated) also is in a position near the center of mobile contact 6a.
In the structure described above, when the temperature-sensing probe (not illustrated) which is connected to relay jack 3 rotates, relay jack 3 also ~603'7 rotates, causing the stationary contacts o the stationary contact components 1l and 12 respectively to move on the mobile contacts 6a and ~a. ~s a result electrical signals from the temperature-sensing probe are transmitted to terminals llc and 12c via the contact point oE the mobile contacts 6a and 7a and the stationary contacts lla and 12a.
In the structure of a slipping connector thus describe~, the contact parts between the mobile and stationary contacts are completely shielded by lid 2 and stationary contact base 9 which concurrently makes up an air-tight shLeld case, thus permitting the contact parts to be completely shielded from the oily and staining atmosphere inside the cooking chamber of the microwave oven. Consequently, colltact parts between the mobile and stationary contacts are not exposed to even the slightest amount of oil and other impurities arising from the food being cooked in the chamber. This permits the contact parts to retain a satisfactory conductivity without the contact resistance increasing.
Figure 3 shows another embodiment of the present invention in which an air-tight shield case 9' which like the stationary contact base is composed of molded plastic, permits the contact parts between the mobile and stationary contacts to be completely shielded.
Structures of preferred embodiments have been described, in which each of two pairs of mobile and stationary contacts are respectively provided. However, the present invention is not intended to limit the number of contacts, but the slipping connector embodied by the present invention may provide more than two pairs of the mobile and stationary contacts.
The present invention re]ates to a slipping con-nector particularly adapted for installation on the oven ceiling that supports the food temperature sensing probe of a microwave oven which incorporates a turntable.
To uniformly heat food microwave ovens often use a -turntable in the cooking chamber and detect the tempera-ture of food during cooking via a temperature-sensing probe in contact with the food, so that the heating can be controlled in response to the temperature detected.
Such a microwave oven usually utilizes a tempera-ture sensing probe in contact with the food which probe rotates along with the turntable, while the output termin-als of the temperature-sensing probe are connected to a slipping connector that is secured to the ceiling of the microwave oven. The food temperature is detected during cooking by ~he electrically-connected slipping connector and the control circuit of the microwave oven unit.
In conventional prior art slipping connectors, for example the one disclosed in U.S. Patent 4,149,056, "Microwave Oven With Food Temperature Means", the contact points between the mobile and stationary contacts of the slipping connector assembly are exposed to the surrounding oven atmosphere containing oil and other impurities inside the microwave oven cavity, and so if the microwave oven was ùsed for a long time contacts of both the mobile and stationary contact devices will become stained by oil and other residues which arise from the food being cooked. In other words, contact resistance between the mobile and stationary contacts will eventually increase after the temperature-sensing probe has been used for a time, thus causing the contacts to malfunction so that food tempera-ture can not be detected accurately or at all during cook-ing.
In light of the disadvantage described above, the present invention provides a slipping connector that inhibits growth of contact resistance even after use of the temperature-sensing probe for a long time.
6Q,37 More particularly, the present invention provides in a microwave oven which utilizes a turntable to rotate food being cooked in a cooking chamber and a temperature sensing probe in contact with the food, output terminals oE the probe being connected to a slipping connector assembly, the slipping connector assembly comprising, a slip connector including mobile contacts connected to the output terminals of the temperature sensing probe ancl stat;orlary contacts having continuous points oE contact witll the mobile contacts and with a control circuit of the microwave oven, and an alr-tight shielding case that shields the points of contact between the mobile and stationary contacts of the slip connector from the atmosphere inside the cooking chamber of the oven, the stationary contacts being supported by the shielding case.
The invention further provides a microwave oven for cooking food which uses a turntable in a cooking chamber and detects temperature of the food during cooking via a temperature sensing probe in contact with food so as to control heating of the food in response to the temperatuee detected comprising, a turntable included in a microwave oven chamber so that the food is cooked and rotated therein, a food temperature-sensing probe for monitoring the temperature of the food placed in the microwave oven chamber for cooking purposes, a slip connector including mobile contacts connected to output terminals of the temperature sensing probe and stationary contacts connected to a control circuit of the microwave oven and having continuous points of contact with the mobile contacts, and an air-tight shielding case which shields or seals the points of contact between the stationary contacts and the mobile contacts and the connection to the control circuit of the slip connector from the atmosphere inside the cooking chamber of the oven, the stationary contacts being supported by the shielding case.
lZlG037 The present invention will become better understood from tile detailed descr:iption of an embodiment thereof given hereafter whicll is included by way of illustration only and is not limitative oE the present invention, and the accompanying drawings in which:
Figure l is a plan view of a slipping connector in accordance Witll one embodiment of the present invention.
Figure 2 is a sectional view ta~n along l ine A
- A of the slipp,ing connector assembly silown in Figure ls and Figure 3 is a sectional view of a slipping connector according to another preferred embodiment oE the present invention.
Figures l and 2 respectively show a plan and an ~-~ sectional view of a sl.ipping connector assembly in accordance with a preEerred embodiment oE the present invention.
A cylindrical relay jack 3, which has a cylindrical lid 2 that is provided with concentric holes, is coupled to a cylindrical choke unit l in an upright position. The cylindrical relay jack 3 incorporates a flange-type mobile contact at one end which is supported by a bearing 5 set in the circumference oE the hole of sleeve 4 which is in the inner wall of a lower part of the choke unit 1, and also by the lid 2.
~ mobile contact 6a and another mobile contact 7a are respectively installed concentrically to the upper position of relay jack 3 via an insulator 8. The contact surface of mobile contact 6a is in the level identical to the contact surface of the other mobile contact 7a, which is itself tightly inserted into the inner surface of relay jack 3 via the cylindrical insulator 8.
The lower parts of mobile contacts 6a and 7a respectively are provided with terminals 6b and 7b that are in contact with the output terminals of the temperature sensing probe (not illustrated). A stationary contact base 9 that secures both stationary contact ~21~37 components 11 and 12 makes up an air-tight case which tightly shields the contact points between the mobile contacts 6a and 7a, while the stationary contact base 9 is secure~ to the microwave oven (not illustrated) by two screws lD.
Stationary contact components 11 and 12 are rnade of phosphorated bronze plates each being provided with conductivity and ~n optimum elasticity, which are secured to the stationary contact base 9 b~ holdfast units 13.
The stationary contact base 9 provides holes 9a and 9b, through which the stationary contact components 11 and 12 pass. To ensure the shielding effect at these holes, the stationary contact base 9 is made of an insulating material having an expansion rate identical to that of the phosphorated bron~e plates.
The stationary contact components 11 and 12 are of the identical structure where the contact parts of these respectively come into contact with the mobile contacts 6a and 7a. For example, stationary contact part 12 is composet~ oE so-called carbon brush having its stationary contact 12a in contact with the mobile contact 7a which is composed oE annealed carbon lump. A spring 12b that presses the mobile contact 7a for contact operation is provided in a position near the center of the stationary contact component 12. A terminal 12c, which is connected to the control circuit of the microwave oven (not illustrated), is extended from a stationary part secured by holdfast unit 13. The other stationary contact component 11 has a structure identical to stationary contact cornponent 120 Stationary contact point 12a of stationary contact component 12 is in a position near the center of the sliding part of a circular plane of mobile contact 7a, while the stationary contact tnot illustrated) also is in a position near the center of mobile contact 6a.
In the structure described above, when the temperature-sensing probe (not illustrated) which is connected to relay jack 3 rotates, relay jack 3 also ~603'7 rotates, causing the stationary contacts o the stationary contact components 1l and 12 respectively to move on the mobile contacts 6a and ~a. ~s a result electrical signals from the temperature-sensing probe are transmitted to terminals llc and 12c via the contact point oE the mobile contacts 6a and 7a and the stationary contacts lla and 12a.
In the structure of a slipping connector thus describe~, the contact parts between the mobile and stationary contacts are completely shielded by lid 2 and stationary contact base 9 which concurrently makes up an air-tight shLeld case, thus permitting the contact parts to be completely shielded from the oily and staining atmosphere inside the cooking chamber of the microwave oven. Consequently, colltact parts between the mobile and stationary contacts are not exposed to even the slightest amount of oil and other impurities arising from the food being cooked in the chamber. This permits the contact parts to retain a satisfactory conductivity without the contact resistance increasing.
Figure 3 shows another embodiment of the present invention in which an air-tight shield case 9' which like the stationary contact base is composed of molded plastic, permits the contact parts between the mobile and stationary contacts to be completely shielded.
Structures of preferred embodiments have been described, in which each of two pairs of mobile and stationary contacts are respectively provided. However, the present invention is not intended to limit the number of contacts, but the slipping connector embodied by the present invention may provide more than two pairs of the mobile and stationary contacts.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a microwave oven which utilizes a turntable to rotate food being cooked in a cooking chamber and a temperature sensing probe in contact with the food, output terminals of the probe being connected to a slipping connector assembly, said slipping connector assembly comprising:
a slip connector including mobile contacts connected to said output terminals of said temperature sensing probe and stationary contacts having continuous points of contact with said mobile contacts and with a control circuit of said microwave oven; and an air-tight shielding case that shields said points of contact between said mobile and stationary contacts of said slip connector from the atmosphere inside the cooking chamber of the oven, said stationary contacts being supported by said shielding case.
a slip connector including mobile contacts connected to said output terminals of said temperature sensing probe and stationary contacts having continuous points of contact with said mobile contacts and with a control circuit of said microwave oven; and an air-tight shielding case that shields said points of contact between said mobile and stationary contacts of said slip connector from the atmosphere inside the cooking chamber of the oven, said stationary contacts being supported by said shielding case.
2. The slipping connector assembly of Claim 1, wherein said shielding case comprises a molded plastic case.
3. The slipping connector assembly of Claim 1, wherein said shielding case is secured to said microwave oven.
4. A microwave oven for cooking food which uses a turntable in a cooking chamber and detects temperature of the food during cooking via a temperature sensing probe in contact with food so as to control heating of the food in response to said temperature detected comprising:
a turntable included in a microwave oven chamber so that the food is cooked and rotated therein;
a food temperature-sensing probe for monitoring the temperature of the food placed in said microwave oven chamber for cooking purposes;
a slip connector including mobile contacts connected to output terminals of said temperature sensing probe and stationary contacts connected to a control circuit of said microwave oven and having continuous points of contact with said mobile contacts; and an air-tight shielding case which shields or seals said points of contact between said stationary contacts and said mobile contacts and said connection to said control circuit of said slip connector from the atmosphere inside the cooking chamber of the oven, said stationary contacts being supported by said shielding case.
a turntable included in a microwave oven chamber so that the food is cooked and rotated therein;
a food temperature-sensing probe for monitoring the temperature of the food placed in said microwave oven chamber for cooking purposes;
a slip connector including mobile contacts connected to output terminals of said temperature sensing probe and stationary contacts connected to a control circuit of said microwave oven and having continuous points of contact with said mobile contacts; and an air-tight shielding case which shields or seals said points of contact between said stationary contacts and said mobile contacts and said connection to said control circuit of said slip connector from the atmosphere inside the cooking chamber of the oven, said stationary contacts being supported by said shielding case.
5. The microwave oven of Claim 4, wherein said shielding case of said slipping connector assembly is secured to said microwave oven.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57-156545 | 1982-10-15 | ||
| JP15654582U JPS5960410U (en) | 1982-10-15 | 1982-10-15 | Microwave oven slip connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1216037A true CA1216037A (en) | 1986-12-30 |
Family
ID=15630135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000438990A Expired CA1216037A (en) | 1982-10-15 | 1983-10-14 | Slipping connector assembly for microwave oven application |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5960410U (en) |
| AU (1) | AU550385B2 (en) |
| CA (1) | CA1216037A (en) |
| DE (1) | DE3337140A1 (en) |
| GB (1) | GB2130059B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4691087A (en) * | 1985-11-29 | 1987-09-01 | Gold Start Co., Ltd. | Preventing twist of a microwave temperature probe line |
| EP0467625A3 (en) * | 1990-07-19 | 1992-08-05 | Cem Corporation | Temperature controlled microwave system for heating contents of sealed moving containers |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2191818A5 (en) * | 1972-06-27 | 1974-02-01 | Sodac | |
| JPS52137735A (en) * | 1976-05-13 | 1977-11-17 | Sharp Corp | Electron range |
| CA1090426A (en) * | 1976-05-13 | 1980-11-25 | Tetuya Kaneshiro | Microwave oven with rotatable food temperature sensing probe |
| DE2813139C2 (en) * | 1978-03-25 | 1982-09-23 | Rowenta-Werke Gmbh, 6050 Offenbach | Rotatable pipe connection |
-
1982
- 1982-10-15 JP JP15654582U patent/JPS5960410U/en active Pending
-
1983
- 1983-10-12 DE DE19833337140 patent/DE3337140A1/en active Granted
- 1983-10-14 CA CA000438990A patent/CA1216037A/en not_active Expired
- 1983-10-14 AU AU20182/83A patent/AU550385B2/en not_active Ceased
- 1983-10-14 GB GB08327539A patent/GB2130059B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB8327539D0 (en) | 1983-11-16 |
| JPS5960410U (en) | 1984-04-20 |
| DE3337140A1 (en) | 1984-04-19 |
| GB2130059A (en) | 1984-05-23 |
| AU550385B2 (en) | 1986-03-20 |
| DE3337140C2 (en) | 1989-03-02 |
| AU2018283A (en) | 1984-04-19 |
| GB2130059B (en) | 1986-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |