TWM525531U - Magnet device with single fixed position to change magnetic circuit - Google Patents
Magnet device with single fixed position to change magnetic circuit Download PDFInfo
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- TWM525531U TWM525531U TW104216523U TW104216523U TWM525531U TW M525531 U TWM525531 U TW M525531U TW 104216523 U TW104216523 U TW 104216523U TW 104216523 U TW104216523 U TW 104216523U TW M525531 U TWM525531 U TW M525531U
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Description
本創作係有關一種可變換磁路單固定位置之磁鐵裝置，尤指一種雙磁路及單邊吸附固定之結構，使其具有較大之自由行程之磁鐵裝置。 The present invention relates to a magnet device capable of changing a fixed position of a magnetic circuit, in particular to a double magnetic circuit and a single-side adsorption fixed structure, which has a magnet device with a large free stroke.
按，磁場效應已被廣泛運用於電磁閥(Valves)、螺線管(Solenoids)、繼電器(Relay)等產品上；而習用電磁閥結構，其主要係利用線圈激磁時所產生之磁力來吸引鐵心，進而達到開啟閥門之目的；惟查，此類型之電磁閥，欲使電磁閥保持開啟狀態，必需持續的使線圈激磁，才能藉由線圈磁力將鐵心向一側邊吸住，因此，其電源的消耗顯然須增大；再者，長時間通激磁以吸住鐵心(1F)，不僅浪費電能，且會使電磁閥過熱發燙，易造成短路或燒毀，具危險性，且降低使用壽命為其缺失。 According to the magnetic field effect has been widely used in solenoid valves (Valves), solenoids (Solenoids), relays (Relay) and other products; and the conventional solenoid valve structure, which mainly uses the magnetic force generated by the coil excitation to attract the core , in turn, to achieve the purpose of opening the valve; but check that this type of solenoid valve, in order to keep the solenoid valve open, must continue to magnetize the coil, in order to attract the core to one side by the coil magnetic force, therefore, its power supply The consumption obviously needs to be increased; in addition, the excitation of the iron core (1F) for a long time is not only wasted electric energy, but also causes the electromagnetic valve to overheat and burn, which is liable to cause short circuit or burn, which is dangerous and has a reduced service life. It is missing.
為此，創作人在美國第6,246,131號「Magnetic Power Apparatus」專利中，揭露一種雙固定位置之磁鐵裝置100，其主要構造如圖1A及1B所示，包括：一外殼體101、一線圈102、一鐵心103、一永久磁鐵104，及左、右二個吸持面105、106所構成，當線圈102激磁時，迫使該鐵心103受到該線圈102之磁力及該永久磁鐵104之磁力作用，而呈現向左推吸附在該左吸持面105，或呈現向右推吸附在該右吸持面106；該案之特徵在於具有左、右雙固定位置，雙向都利用永久磁鐵104的磁力來產生保持力，因此不須連續通電流，不僅可節省電能，且不發燙過熱或短路燒毀，可避免危險性及增長使用壽命之功效，可改善上述習用電磁閥之缺失。惟查，該案具有左、右二個吸持面105、106之雙固定位置的特徵，雖有上述優點，但雙固定位置也 造成該鐵心103的左、右行程(D)受到限制，也就是說，該右吸持面106的這一端是一個封閉結構107，如果左、右行程(D)是5mm，則無論鐵心103是向左或向右移動的距離一定是整整5mm的固定行程，不會是4.9mm或5.1mm，如此一來，受到鐵心103制動之物件(圖未示)有誤差或損耗時，則會造成無法完全使物件封閉或到達預定位置的缺失。且不論是圖1A及1B所示之永久磁鐵104為柱狀，鐵心103位於永久磁鐵104的外周緣，會有上述之問題點，即使是在該案中另一實施例所揭露之永久磁鐵為環狀，鐵心位於永久磁鐵之內周緣的構造(如該案之圖5及圖6所示)，由於該右吸持面106的這一端也是一個封閉結構107，因此同樣會造成向右移動的距離一定是固定行程，仍然具有無法完全使物件封閉或到達預定位置的缺失，因此尚有改善空間。 To this end, the creator of the "Magnetic Power Apparatus" patent No. 6,246,131 discloses a magnet device 100 of a double fixed position, the main structure of which is shown in FIGS. 1A and 1B, comprising: an outer casing 101, a coil 102, A core 103, a permanent magnet 104, and two left and right holding surfaces 105, 106 are configured to force the core 103 to be subjected to the magnetic force of the coil 102 and the magnetic force of the permanent magnet 104 when the coil 102 is excited. The display is pushed to the left to be adsorbed on the left holding surface 105, or is pushed to the right to be adsorbed on the right holding surface 106; the case is characterized by having left and right double fixed positions, and both directions are generated by the magnetic force of the permanent magnet 104. Retention, so there is no need to continuously pass current, not only can save energy, and does not burn overheat or short circuit burn, can avoid the danger and increase the service life, can improve the lack of the above-mentioned conventional solenoid valve. However, the case has the characteristics of the double fixed positions of the left and right holding surfaces 105, 106. Although the above advantages are obtained, the double fixed position is also The left and right strokes (D) of the core 103 are restricted, that is, the end of the right holding surface 106 is a closed structure 107, and if the left and right strokes (D) are 5 mm, the core 103 is The distance to the left or right must be a fixed stroke of 5mm, which is not 4.9mm or 5.1mm. Therefore, if there is any error or loss of the object (not shown) that is braked by the core 103, it will be impossible. Completely closing the object or missing the desired location. Regardless of whether the permanent magnet 104 shown in FIGS. 1A and 1B is columnar and the core 103 is located on the outer periphery of the permanent magnet 104, there is a problem as described above, even in the case where the permanent magnet disclosed in another embodiment is The structure in which the core is located at the inner circumference of the permanent magnet (as shown in Figs. 5 and 6 of the case), since the end of the right holding surface 106 is also a closed structure 107, it also causes a rightward movement. The distance must be a fixed stroke, and there is still a lack of complete closure of the object or reaching a predetermined location, so there is room for improvement.
是以，本創作人進一步解決自已所擁有之美國第6,246,131號專利中，該鐵心103之移動為固定行程(D)的上述問題點，是為本創作之主要課題。 Therefore, the creator further solves the above-mentioned problem of the movement of the core 103 as a fixed stroke (D) in the US Patent No. 6,246,131, which is owned by the present invention, and is a main subject of the present invention.
緣是，本創作主要目的，係在提供一種可變換磁路單固定位置之磁鐵裝置，其以雙磁路及單邊吸附固定之設計，藉由改變磁力方向，運用該永久磁鐵的磁路改變及彈簧的輔助，即可使該鐵心常態保持於預定位置，此種雙磁路及單邊吸附固定之構造，使其具有較大之自由行程，除了可擴大產品使用範圍，更可在物件有誤差或損耗時，自動調整其行程，具有確保產品可靠度之功效。 The reason is that the main purpose of this creation is to provide a magnet device that can change the fixed position of a magnetic circuit. The design of the dual magnetic circuit and the single-side adsorption and fixation is changed by changing the magnetic direction and using the magnetic circuit of the permanent magnet. With the aid of the spring, the normal state of the iron core can be maintained at a predetermined position. The structure of the double magnetic circuit and the single side adsorption and fixing has a large free travel, in addition to expanding the range of use of the product, and When the error or loss occurs, the stroke is automatically adjusted to ensure the reliability of the product.
本創作次要目的，則在提供一種可變換磁路單固定位置之磁鐵裝置，其能以較小的功率，即可達到改變左、右固定位置之功能，具有節省電能之功效增進。 For the secondary purpose of the present invention, a magnet device capable of changing a fixed position of a magnetic circuit can be provided, which can achieve the function of changing the left and right fixed positions with a small power, and has the effect of saving electric energy.
為達上述目的，本創作所採用之技術手段包含：一外殼，該外殼之 內周緣環設有一線圈，且內部中央預留有空間可供一鐵心在其軸向上作不同位置之左、右位移，又該鐵心於常態時至少需有部分本體與該線圈內緣相耦合；一驅動電路，係裝設在外殼之一側邊，用以提供該線圈一脈衝電壓，激磁改變磁力方向，使該鐵心改變位置，據以構成一電磁螺線管型態的磁鐵裝置；其特徵在於：該外殼之左、右兩側分別形成一第一側邊及一第二側邊，該外殼及第一、二側邊皆係由導磁性材質所構成，且該第一側邊之內緣面係配合該鐵心之左側面，設有一可與其相互貼合之吸持面；一永久磁鐵，該永久磁鐵的內、外側分別為不同磁性的第一型磁極與第二型磁極，且該第二型磁極係與該外殼之第二側邊接觸導磁，又該永久磁鐵的內周緣，係供該鐵心之右段部穿伸耦合；一不具導磁性之軸向管，該軸向管係用以供該鐵心的左段部容置其中，且其右側端具有一開口，該開口係延伸至該外殼之第二側邊，可供該鐵心之右側面穿出該第二側邊；以及一彈簧，該彈簧係設在該鐵心之預定位置，用以提供該鐵心一朝向右側之作用力；藉此，當該線圈未激磁時，該永久磁鐵之磁力線係由該第一型磁極(N)經該鐵心→該第二側邊，再回到該第二型磁極(S)，形成一封閉之小型外推磁路，提供該鐵心一向右之磁力，並配合該彈簧提供該鐵心一向右之彈力，使該鐵心在該線圈未激磁時，即可常態保持呈靠右位置；又當該驅動電路輸出一脈衝電壓，該線圈激磁產生大於該永久磁鐵之磁力，使該永久磁鐵之磁力轉向跟隨該線圈之磁力方向，由該第一型磁極(N)→該鐵心→該吸持面→該第一側邊→該外殼→該第二側邊，再回到該第二型磁極(S)，形成一封閉之大型內推磁路，迫使該鐵心受到該線圈磁力及該永久磁鐵磁力而向左推，使該鐵心之左側面吸附固定在該吸持面上，使該線圈不用再激磁，即可常態保持呈靠左位置；據此，藉由改變磁力方向，運用該永久磁鐵的磁路改變及 該彈簧的輔助，即可使該鐵心常態保持於預定位置，不須持續耗電。 In order to achieve the above purposes, the technical means employed in the creation include: a casing, the casing The inner circumference ring is provided with a coil, and a space is reserved in the inner center for the left and right displacement of a core in different positions in the axial direction, and at least a part of the body is coupled with the inner edge of the coil when the core is in a normal state; a driving circuit is disposed on one side of the outer casing to provide a pulse voltage of the coil, and the magnetic field changes the direction of the magnetic force to change the position of the iron core, thereby forming an electromagnetic solenoid type magnet device; The first side and the second side of the outer and outer sides of the outer casing are respectively formed by a magnetic material and the first side is The rim surface is matched with the left side surface of the iron core, and has a holding surface that can be attached to each other; a permanent magnet, the inner and outer sides of the permanent magnet are different magnetic first type magnetic poles and second type magnetic poles, respectively, and The second type magnetic pole is in contact with the second side of the outer casing, and the inner circumference of the permanent magnet is coupled to the right portion of the core; the axial tube without magnetic conduction, the axial tube Used to supply the left section of the core Wherein, the right end thereof has an opening extending to the second side of the outer casing for the right side of the core to pass through the second side; and a spring disposed on the core a predetermined position for providing a force of the core toward the right side; thereby, when the coil is not excited, the magnetic line of the permanent magnet passes through the core of the first type magnetic pole (N) → the second side Returning to the second type magnetic pole (S), forming a closed small extrapolation magnetic circuit, providing a magnetic force of the iron core to the right, and supporting the spring to provide a rightward elastic force of the iron core, so that the iron core is not excited in the coil When the driving circuit outputs a pulse voltage, the driving circuit generates a magnetic force larger than the permanent magnet, so that the magnetic force of the permanent magnet turns to follow the magnetic direction of the coil, and the first Type magnetic pole (N) → the core → the holding surface → the first side → the outer shell → the second side, and then return to the second type magnetic pole (S) to form a closed large inward magnetic circuit Forcing the core to be subjected to the coil magnetic force and the The magnetic force of the magnet is pushed to the left for a long time, so that the left side of the core is adsorbed and fixed on the holding surface, so that the coil can be kept in the left position without being excited again; accordingly, by changing the direction of the magnetic force, Magnetic circuit change of permanent magnet and With the aid of the spring, the core normal state can be maintained at a predetermined position without continuously consuming power.
依據前揭特徵，該鐵心可包括由一可導磁之左段部及一不可導磁之右段部，分別成型後再相互組合所構成為較佳。 According to the foregoing feature, the core may comprise a magnetically conductive left section and a non-magnetically permeable right section, which are preferably formed separately and then combined with each other.
依據前揭特徵，該驅動電路可包括有：一電源輸出線與前述線圈連接，其開啟電源時係輸出一正脈衝電壓，當關閉電源後產生一放電電流而輸出一負脈衝電壓，利用此一瞬間的正或負脈衝電壓，提供該線圈完成激磁改變磁力方向，俾對該鐵心產生推力或拉力使其位移，並迫使該永久磁鐵變換磁路，使該鐵心常態保持於預定位置。 According to the foregoing feature, the driving circuit may include: a power output line connected to the coil, and a positive pulse voltage is output when the power is turned on, and a negative current is generated when the power is turned off, and a negative pulse voltage is output. An instantaneous positive or negative pulse voltage is provided to complete the excitation to change the direction of the magnetic force, and the thrust is generated by the thrust or tension of the core, and the permanent magnet is forced to change the magnetic circuit to maintain the normal state of the core at a predetermined position.
依據前揭特徵，該永久磁鐵之第一型磁極為N極，第二型磁極為S極，且該永久磁鐵之第一型磁極(N極)可設有一導磁環。 According to the foregoing feature, the first type of magnet of the permanent magnet is N pole, the second type magnet is S pole, and the first type pole (N pole) of the permanent magnet can be provided with a magnetic flux ring.
在一可行實施例中，該吸持面係可設在該第一側邊內緣所形成之一柱體的端面，且該柱體的軸向設有一通孔；該第二側邊更包括連接一閥體，該閥體相對於該鐵心之右側面，設有一氣室，該氣室分別與一進氣口與一出氣口連通，且該鐵心之右側面右推時係可頂抵封閉該進氣口，再者，該鐵心設有一導氣口，該導氣孔口之入口端係與該氣室連通，據以將由該出氣口回流至該氣室之氣體，通過該導氣口之入口端導入該鐵心後，經由該柱體的軸向通孔，排氣至該第一側邊外部。 In a possible embodiment, the holding surface may be disposed on an end surface of a cylinder formed by the inner edge of the first side edge, and a through hole is formed in the axial direction of the column; the second side further includes Connected to a valve body, the valve body is provided with a gas chamber with respect to the right side of the iron core, and the air chamber is respectively connected with an air inlet and an air outlet, and the right side of the iron core is pushed upright when closed. In addition, the iron core is provided with an air guiding port, and the inlet end of the air guiding opening is in communication with the air chamber, so that the gas returned from the air outlet to the air chamber passes through the inlet end of the air guiding port. After the core is introduced, it is exhausted to the outside of the first side through the axial through hole of the column.
藉助上揭技術手段，本創作排除美國第6,246,131號專利中右側邊為一封閉結構107的設計，改以『雙磁路及單邊吸附固定』之設計，藉由改變磁力方向，運用該永久磁鐵的磁路改變及該彈簧的輔助，即可使該鐵心常態保持於預定位置，此種『雙磁路及單邊吸附固定』之構造，使其具有較大之自由行程，除了可擴大產品使用範圍，更可在物件有誤差或損耗時，自動調整其行程，具有確保產品可靠度之功效。再者，以該彈簧輔助並配合該永久磁鐵的磁路改變，使得本創作能以較小的功率，即可達到改變固定位置之 功能，具有節省電能之功效增進。 With the help of the above-mentioned technical means, this design excludes the design of the closed structure 107 on the right side of the US Patent No. 6,246,131, and changes the design of "double magnetic circuit and single side adsorption fixation", and uses the permanent magnet by changing the direction of the magnetic force. The magnetic circuit change and the assistance of the spring can maintain the normal state of the core at a predetermined position, and the structure of the "double magnetic circuit and single-side adsorption fixed" has a large free travel, in addition to expanding the product use. The range can automatically adjust the stroke of the object when there is error or loss, which has the effect of ensuring product reliability. Moreover, the magnetic circuit assisted by the spring and matched with the permanent magnet, so that the creation can change the fixed position with less power. Function, with the effect of saving energy.
10‧‧‧外殼 10‧‧‧ Shell
11‧‧‧第一側邊 11‧‧‧ first side
11a‧‧‧柱體 11a‧‧‧Cylinder
11b‧‧‧通孔 11b‧‧‧through hole
12‧‧‧第二側邊 12‧‧‧Second side
13‧‧‧吸持面 13‧‧‧ Holding surface
20‧‧‧線圈 20‧‧‧ coil
30‧‧‧鐵心 30‧‧‧ iron core
30R‧‧‧右段部 30R‧‧‧Right section
30L‧‧‧左段部 30L‧‧‧Left section
31‧‧‧左側面 31‧‧‧ left side
32‧‧‧右側面 32‧‧‧ right side
33‧‧‧凸緣體 33‧‧‧Flange body
34‧‧‧導氣口 34‧‧‧air guide
40‧‧‧驅動電路 40‧‧‧Drive circuit
41‧‧‧電源輸出線 41‧‧‧Power output line
50‧‧‧永久磁鐵 50‧‧‧ permanent magnet
51‧‧‧第一型磁極 51‧‧‧First type magnetic pole
52‧‧‧第二型磁極 52‧‧‧Second type magnetic pole
53‧‧‧導磁環 53‧‧‧magnetic ring
60‧‧‧軸向管 60‧‧‧Axial tube
61‧‧‧開口 61‧‧‧ openings
70‧‧‧彈簧 70‧‧‧ Spring
80‧‧‧閥體 80‧‧‧ valve body
81‧‧‧進氣口 81‧‧‧air inlet
82‧‧‧氣室 82‧‧‧ air chamber
83‧‧‧出氣口 83‧‧‧ air outlet
90‧‧‧磁鐵裝置 90‧‧‧Magnetic device
90A‧‧‧電磁閥 90A‧‧‧Solenoid valve
(L)‧‧‧大型內推磁路 (L)‧‧‧ Large internal push magnetic circuit
(R)‧‧‧小型外推磁路 (R)‧‧‧Small extrapolation magnetic circuit
圖1A係習用一種雙固定電磁閥之構造示意圖，其顯示鐵心向右移之狀態。 Fig. 1A is a schematic view showing the construction of a double fixed solenoid valve showing a state in which the iron core is moved to the right.
圖1B係習用一種雙固定電磁閥之構造示意圖，其顯示鐵心向左移之狀態。 Fig. 1B is a schematic view showing the construction of a double fixed solenoid valve showing a state in which the iron core is shifted to the left.
圖2A係本創作一可行實施例之構造剖示圖，其顯示鐵心向右移之位置。 Figure 2A is a cross-sectional view showing the construction of a possible embodiment of the present invention showing the position where the core is moved to the right.
圖2B係本創作一可行實施例之構造剖示圖，其顯示鐵心向左移之位置。 Fig. 2B is a cross-sectional view showing the construction of a possible embodiment of the present invention, showing the position where the iron core is moved to the left.
圖3A係顯示圖2A未激磁時之磁力線示意圖。 Fig. 3A is a view showing the magnetic lines of force when Fig. 2A is not excited.
圖3B係顯示正脈衝電壓激磁開啟時之磁力線示意圖。 Fig. 3B is a view showing a magnetic line of force when the positive pulse voltage is activated.
圖3C係顯示鐵心正在左移進行中之磁力線示意圖。 Fig. 3C is a schematic view showing magnetic lines of force in which the iron core is moving leftward.
圖3D係顯示鐵心左移後之磁力線示意圖。 Figure 3D is a schematic view showing the magnetic lines of force after the left core is moved.
圖3E係顯示負脈衝電壓激磁開啟時之磁力線示意圖。 Fig. 3E is a view showing a magnetic line of force when the negative pulse voltage is activated.
圖3F係顯示本創作鐵心右移後之磁力線示意圖。 Fig. 3F is a schematic view showing the magnetic lines of force after the core of the present invention is shifted to the right.
圖4A係本創作為電磁閥型態之一使用狀態圖，其顯示鐵心右移。 Fig. 4A is a state diagram of the use of one of the solenoid valve types, which shows that the core is shifted to the right.
圖4B係本創作為電磁閥型態之一使用狀態圖，其顯示鐵心左移。 Fig. 4B is a state diagram of the use of one of the solenoid valve types, which shows that the core is shifted to the left.
圖5A係本創作為電磁閥型態之另一種使用狀態圖，其顯示鐵心右移進氣關閉。 Fig. 5A is another use state diagram of the solenoid valve type, which shows that the core is shifted to the right and the intake is closed.
圖5B係本創作為電磁閥型態之另一種使用狀態圖，其顯示鐵心左移進氣及出氣開啟。 Fig. 5B is another use state diagram of the solenoid valve type, which shows that the iron core is moved to the left and the air is opened.
圖5C係本創作為電磁閥型態之另一種使用狀態圖，其顯示鐵心右移進氣關閉及排氣開啟。 Fig. 5C is another use state diagram of the solenoid valve type, which shows that the core is shifted to the right and the exhaust is opened.
首先，請參閱圖2A及2B，其中圖2A係顯示鐵心向右移之位置，圖2B係顯示鐵心向左移之位置，本創作所揭露之可變換磁路之磁鐵裝 置90，包括：一外殼10，該外殼10之內周緣環設有一線圈20，且內部中央預留有空間可供一鐵心30在其軸向上作不同位置之左、右位移，又該鐵心30於常態時至少需有部分本體與該線圈20內緣相耦合；一驅動電路40，係裝設在外殼10之一側邊，用以提供該線圈20一脈衝電壓，激磁改變磁力方向，使該鐵心30改變位置，據以構成一電磁螺線管型態的磁鐵裝置90；惟，以上結構係屬先前技術(prior art)，非本創作之專利標的，容不贅述。 First, please refer to FIG. 2A and FIG. 2B, wherein FIG. 2A shows the position where the iron core is moved to the right, and FIG. 2B shows the position where the iron core shifts to the left. The magnetic device of the convertible magnetic circuit disclosed in the present application is installed. 90, comprising: a casing 10, the inner circumference of the casing 10 is provided with a coil 20, and a space is reserved in the inner center for the left and right displacement of a core 30 in different positions in the axial direction thereof, and the core 30 is further At least one part of the body is coupled to the inner edge of the coil 20 in a normal state; a driving circuit 40 is disposed on one side of the outer casing 10 for providing a pulse voltage of the coil 20, and the magnetic field changes the direction of the magnetic force, so that The core 30 is changed in position to form an electromagnetic solenoid type 90 of the electromagnetic solenoid type; however, the above structure is a prior art, and the patents of the present invention are not described herein.
是以，本創作之特徵在於：該外殼10之左、右兩側分別形成一第一側邊11及一第二側邊12，該外殼10及第一、二側11、12邊皆係由導磁性材質所構成，且該第一側邊11之內緣面係配合該鐵心30之左側面31，設有一可與其相互貼合之吸持面13；一永久磁鐵50，該永久磁鐵50的內、外側分別為不同磁性的第一型磁極51與第二型磁極52，且該第二型磁極52係與該外殼之第二側邊12接觸導磁，本實施例中，該第一型磁極51為N極，第二型磁極52為S極；又該永久磁鐵50的內周緣，係供該鐵心30之右段部30R穿伸耦合；本實施例中，該鐵心30係由一可導磁之左段部30L及一不可導磁之右段部30R，分別成型後再組合所構成為最佳，但不限定於此。該鐵心30亦可由可導磁之材質一體成型所構成，惟該鐵心30之右段部30R的外徑需小於左段部30L，避免外徑過大而改變了預定磁力的路徑，亦即如圖3C所示，使鐵心30正在左移進行中之磁力線(圖中實線箭頭所示)，使其能順利由第二型磁極52之S極進入，然後由第一型磁極51為N極出來，再進入該鐵心30之左段部30L。當然，如果該右段部30R係為不可導磁之材質所構成，則磁力線之路徑必然如圖3C所示。 Therefore, the present invention is characterized in that: a first side 11 and a second side 12 are formed on the left and right sides of the outer casing 10, and the outer casing 10 and the first and second sides 11 and 12 are respectively The magnetic material is formed, and the inner edge surface of the first side 11 is matched with the left side surface 31 of the core 30, and a holding surface 13 which can be attached to each other is provided; a permanent magnet 50, the permanent magnet 50 The inner and outer sides are respectively different magnetic first type poles 51 and second type magnetic poles 52, and the second type magnetic poles 52 are in contact with the second side 12 of the outer casing. In this embodiment, the first type The magnetic pole 51 is an N pole, and the second magnetic pole 52 is an S pole. The inner circumference of the permanent magnet 50 is coupled to the right portion 30R of the core 30. In this embodiment, the core 30 is It is preferable that the magnetic waveguide left segment portion 30L and the non-magnetically conductive right segment portion 30R are formed separately and then combined, but the invention is not limited thereto. The core 30 can also be integrally formed of a magnetically permeable material, but the outer diameter of the right portion 30R of the core 30 needs to be smaller than the left portion 30L, so as to avoid the outer diameter being too large and changing the path of the predetermined magnetic force, that is, as shown in the figure. As shown in 3C, the core 30 is moved to the left by the magnetic field line (shown by the solid arrow in the figure) so that it can smoothly enter the S pole of the second type magnetic pole 52, and then the first type magnetic pole 51 is the N pole. And enter the left section 30L of the core 30 again. Of course, if the right segment 30R is made of a material that is not magnetically conductive, the path of the magnetic lines of force is necessarily as shown in FIG. 3C.
再者，該鐵心30相對於左側面31之另一側，具有一右側面32。在一較佳實施例中，該左側面31及右側面32係具有一平面，俾能抵靠在吸持面13或預定之位置，當然，平面上可依需求嵌設有膠體，以增加密合度，如 圖5A至5C所示者。 Furthermore, the core 30 has a right side surface 32 with respect to the other side of the left side surface 31. In a preferred embodiment, the left side surface 31 and the right side surface 32 have a flat surface, and the crucible can abut against the holding surface 13 or a predetermined position. Of course, a colloid can be embedded on the plane to increase the density. Fit, such as Figures 5A to 5C.
一不具導磁性之軸向管60，該軸向管60係用以供該鐵心30的左段部30L容置其中，且其右側端具有一開口61，該開口61係延伸至該外殼10之第二側邊12，可供該鐵心30之右側面32穿出該第二側邊12；以及一彈簧70，該彈簧70係設在該鐵心30之預定位置，用以提供該鐵心30一朝向右側之作用力。本實施例中，該鐵心30之右段部30R之外側設有一凸緣體34，該彈簧70係套設在該鐵心30之右段部30R，且其內端頂抵該軸向管60之開口61，外端頂抵該凸緣體34，藉此，能提供該鐵心30一朝向右側之作用力。當然，該彈簧70不限定設置在此一位置，例如：將該彈簧70設在該鐵心30之左側面31與吸持面13之間，亦可提供該鐵心30一朝向右側之作用力，容不贅述。 A non-magnetic axial tube 60 for receiving the left portion 30L of the core 30 and having an opening 61 at the right end thereof, the opening 61 extending to the outer casing 10 a second side 12 for the right side 32 of the core 30 to pass through the second side 12; and a spring 70 disposed at a predetermined position of the core 30 for providing the core 30 with an orientation The force on the right side. In this embodiment, a flange body 34 is disposed on the outer side of the right portion 30R of the core 30. The spring 70 is sleeved on the right portion 30R of the core 30, and the inner end thereof abuts against the axial tube 60. The opening 61 has an outer end that abuts against the flange body 34, whereby the force of the core 30 toward the right side can be provided. Of course, the spring 70 is not limited to be disposed at this position. For example, the spring 70 is disposed between the left side surface 31 of the core 30 and the holding surface 13 , and the force of the core 30 toward the right side can also be provided. Do not repeat them.
藉由上揭構成，如圖2A所示，當該線圈20未激磁時，該永久磁鐵50之磁力線係由該第一型磁極51(N)經該鐵心30→該第二側邊12，再回到該第二型磁極52(S)，形成一封閉之小型外推磁路(R)，提供該鐵心30一向右之磁力，並配合該彈簧70提供該鐵心30一向右之彈力，使該鐵心30在該線圈20未激磁時，即可常態保持呈靠右位置。本創作一項特徵是該鐵心30之右側面32並非如習用裝置，係被一封閉之右側邊所限制位置，該鐵心30之右側面32係可穿伸於該第二側邊12，因此其行程(D)的自由度較大，例如：磁鐵裝置90的第二側邊12結合一閥體80，該閥體80之進氣口81距離如有誤差或損耗，該鐵心30之右側面32可依需求調整其行程(D)，亦即該右側面32右推時會緊迫該進氣口81，以確保產品使用之可靠度及精準度。 According to the above configuration, as shown in FIG. 2A, when the coil 20 is not excited, the magnetic line of the permanent magnet 50 passes through the core 30 (N) through the core 30 → the second side 12, and then Returning to the second type magnetic pole 52(S), forming a closed small extrapolation magnetic circuit (R), providing a magnetic force to the right of the iron core 30, and supporting the spring 70 to provide a rightward elastic force of the iron core 30, so that the When the coil 20 is not energized, the core 30 can be kept in the right position in a normal state. A feature of the present invention is that the right side 32 of the core 30 is not a conventional device and is constrained by a closed right side. The right side 32 of the core 30 can extend through the second side 12, so that The degree of freedom of the stroke (D) is large. For example, the second side 12 of the magnet device 90 is combined with a valve body 80. The distance of the air inlet 81 of the valve body 80 is error or loss, and the right side 32 of the core 30 is 32. The stroke (D) can be adjusted according to the demand, that is, the right side 32 will press the air inlet 81 when pushing right to ensure the reliability and accuracy of the product.
又，如圖2B所示，當該驅動電路40輸出一脈衝電壓，該線圈20激磁產生大於該永久磁鐵50之磁力，使該永久磁鐵50之磁力轉向跟隨該線圈20之磁力方向，由該第一型磁極51(N)→該鐵心30→該吸持面13→該第一側邊11→該外殼10→該第二側邊12，再回到該第二型磁極52(S)，形成一封 閉之大型內推磁路(L)，迫使該鐵心30受到該線圈磁力及該永久磁鐵磁力而向左推，使該鐵心30之左側面31吸附固定在該吸持面13上，使該線圈20不用再激磁，即可常態保持呈靠左位置；據此，藉由改變磁力方向，運用該永久磁鐵50的磁路改變及該彈簧70的輔助，即可使該鐵心30常態保持於預定位置，不須持續耗電。 Moreover, as shown in FIG. 2B, when the driving circuit 40 outputs a pulse voltage, the coil 20 is excited to generate a magnetic force larger than the permanent magnet 50, so that the magnetic force of the permanent magnet 50 is turned to follow the magnetic direction of the coil 20. a type of magnetic pole 51 (N) → the core 30 → the holding surface 13 → the first side 11 → the outer casing 10 → the second side 12, and then return to the second type magnetic pole 52 (S), forming One The large magnetic circuit (L) is closed, forcing the core 30 to be pushed to the left by the magnetic force of the coil and the magnetic force of the permanent magnet, so that the left side 31 of the core 30 is adsorbed and fixed on the holding surface 13, so that the coil 20, without re-excitation, the normal state remains in the left position; accordingly, by changing the magnetic direction, using the magnetic circuit change of the permanent magnet 50 and the assistance of the spring 70, the core 30 can be normally maintained at a predetermined position. , no need to continue to consume electricity.
本實施例中，該永久磁鐵50之第一型磁極51(N)可設有一導磁環53，俾以增強磁力效應，也就是說，該第一型磁極51之N極的磁力線先通過該導磁環53後，再導入鐵心30，據以增強磁力效應。當然如果永久磁鐵50之磁力夠強，則可以不用導磁環53；惟大部分之鐵裝置體積都力求縮小，故可視用途不用導磁環53，以縮小體積，減少成本。 In this embodiment, the first type magnetic pole 51 (N) of the permanent magnet 50 may be provided with a magnetic conductive ring 53 for enhancing the magnetic force effect, that is, the magnetic lines of the N pole of the first type magnetic pole 51 pass through the first After the magnetic flux ring 53, the core 30 is further introduced to enhance the magnetic force effect. Of course, if the magnetic force of the permanent magnet 50 is strong enough, the magnetic flux ring 53 can be omitted; however, most of the iron devices are required to be reduced in size, so that the magnetic conductive ring 53 is not used for visual purposes, thereby reducing the volume and reducing the cost.
為能更清楚說明上揭圖2A及2B中，該永久磁鐵50之磁路改變的情形，請配合圖3A至圖3F所示，其中圖3A係圖2A未激磁時之磁力線狀態示意圖，亦即當電源關閉時，該線圈20未激磁，此時該永久磁鐵50之磁力線係由第一型磁極(N)經導磁環53→鐵心30→第二側邊12，再回到第二型磁極(S)，形成一封閉之小型外推磁路(R)，圖中虛線所示即為該永久磁鐵50之磁力線路徑特性；據此，使該永久磁鐵50提供該鐵心30向右推力(PUSH)。 In order to more clearly illustrate the case where the magnetic circuit of the permanent magnet 50 is changed in FIG. 2A and FIG. 2B, please refer to FIG. 3A to FIG. 3F, wherein FIG. 3A is a schematic diagram of the magnetic line state when the magnetic field is not excited in FIG. 2A, that is, When the power is turned off, the coil 20 is not excited. At this time, the magnetic line of the permanent magnet 50 is passed from the first type magnetic pole (N) via the magnetic conductive ring 53 → the core 30 → the second side 12, and then returns to the second type magnetic pole. (S), forming a closed small extrapolation magnetic circuit (R), which is the magnetic line path characteristic of the permanent magnet 50; accordingly, the permanent magnet 50 is provided to the rightward thrust of the core 30 (PUSH) ).
接著，圖3B所示係供給一(正)脈衝電壓激磁開啟之磁力線狀態圖，亦即當一適當電壓施加於線圈20，產生大於永久磁鐵50之磁力(圖中實線箭頭所示)，令原本永久磁鐵50之磁力路徑(虛線所示)被抵銷，使永久磁鐵50之磁力轉向跟隨線圈20之磁力方向，迫使鐵心30受到線圈磁力及永久磁鐵磁力，而如圖3C所示呈現向左推移的過程，此時線圈20之磁力方向(圖中實線箭頭所示)，會走最短的路徑，因此會在鐵心30向左位移後，會由原先圖3B所示之磁力路徑改成如圖3C所示，由本永久磁鐵50之第二型磁極52(S)進入，而由第一型磁極51(N)出來，然後，鐵心30被左移至圖3D所示之位置。至此， 鐵心30只需靠永久磁鐵50由第一型磁極51(N)→經過導磁環53→鐵心30→吸持面13→第一側邊11→外殼10→第二側邊12，再回到第二型磁極52(S)的封閉大型內推磁路(L)，就可以保持固定在這個位置；此時之線圈20不用再激磁，即可以使鐵心30靠左保持吸住在這位置。 Next, FIG. 3B is a state diagram of magnetic lines of force for supplying a (positive) pulse voltage excitation, that is, when an appropriate voltage is applied to the coil 20, a magnetic force larger than that of the permanent magnet 50 is generated (indicated by a solid arrow in the figure). The magnetic path (shown by the dashed line) of the permanent magnet 50 is offset, so that the magnetic force of the permanent magnet 50 is turned to follow the magnetic direction of the coil 20, forcing the core 30 to receive the magnetic force of the coil and the magnetic force of the permanent magnet, and is presented to the left as shown in FIG. 3C. During the transition process, the magnetic direction of the coil 20 (shown by the solid arrow in the figure) will take the shortest path, so after the core 30 is displaced to the left, the magnetic path shown in Fig. 3B will be changed to As shown in Fig. 3C, the second type magnetic pole 52 (S) of the permanent magnet 50 enters and exits from the first type magnetic pole 51 (N), and then the core 30 is moved to the left to the position shown in Fig. 3D. At this point, The core 30 only needs to be returned by the permanent magnet 50 from the first type magnetic pole 51 (N) → through the magnetic conductive ring 53 → the core 30 → the holding surface 13 → the first side 11 → the outer casing 10 → the second side 12, and then back The closed large inward magnetic circuit (L) of the second type magnetic pole 52(S) can be kept fixed at this position; at this time, the coil 20 can be kept in the left position without being excited again.
如圖3E所示係供給一(負)脈衝電壓激磁開啟之磁力線狀態圖，由於鐵心30係在左邊，如欲使其右移，則線圈20之磁力線路徑必需相反於圖3D所示之永久磁鐵磁力線方向，是以，如果圖3B供給線圈20為正脈衝電壓，則圖3E即為一負脈衝電壓，俾使其磁力線路徑(圖中實線箭頭所示)係對鐵心30產生一種右推的作用，而相反於永久磁鐵50之磁力路徑(虛線所示)，使得原本之永久磁鐵50的磁力路徑被抵銷及產生吸持面13排斥現象，而續向右移至圖3F所示之位置，此時，線圈20不用持續供電，因磁力線是走最近的路徑；至此，鐵心30只需永久磁鐵50由第一型磁極51(N)經導磁環53→鐵心30→第二側邊12，再回到第二型磁極52(S)，形成一封閉之小型外推磁路(R)，提供該鐵心30一向右之磁力，並配合該彈簧70提供該鐵心30一向右之彈力，使該鐵心30又回到如圖3A所示之狀態，在該線圈20未激磁時，即可常使鐵心30保持呈靠右位置的狀態。是以，本創作之彈簧70在右推時提供使鐵心30右推的助力，而當鐵心30左推時雖會增加一點阻力，但該彈性阻力相對於該磁力卻微乎其微；再者本創作之彈簧70搭配該雙磁路的設計，使該鐵心30右推時，僅需很小的功率即可使鐵心30右推。是以，整體上具有節省電能之功效增進。 As shown in FIG. 3E, a magnetic line state diagram of a (negative) pulse voltage excitation is turned on. Since the core 30 is on the left side, if it is to be shifted to the right, the magnetic field path of the coil 20 must be opposite to the permanent magnet shown in FIG. 3D. The direction of the magnetic flux line is such that if the supply coil 20 of FIG. 3B is a positive pulse voltage, FIG. 3E is a negative pulse voltage, and the magnetic field line path (shown by the solid arrow in the figure) causes a right push on the core 30. The action, but opposite to the magnetic path of the permanent magnet 50 (shown by the dashed line), causes the magnetic path of the permanent magnet 50 to be offset and the attraction of the suction surface 13 to be repulsive, and continues to the right to the position shown in FIG. 3F. At this time, the coil 20 does not need to be continuously supplied with power, because the magnetic line is the closest path; thus, the core 30 only needs the permanent magnet 50 from the first type magnetic pole 51 (N) via the magnetic conductive ring 53 → the core 30 → the second side 12 And returning to the second type magnetic pole 52(S) to form a closed small extrapolation magnetic circuit (R), providing a magnetic force to the right of the iron core 30, and matching the spring 70 to provide the elastic force of the iron core 30 to the right, so that The core 30 returns to the state shown in FIG. 3A at the coil 20 When the magnet is not excited, the core 30 can always be kept in the right position. Therefore, the spring 70 of the present invention provides a boosting force for pushing the core 30 to the right when pushing right, and a little resistance is added when the core 30 is pushed to the left, but the elastic resistance is minimal relative to the magnetic force; The spring 70 is matched with the design of the double magnetic circuit, so that when the core 30 is pushed to the right, the core 30 can be pushed to the right with only a small power. Therefore, the overall effect of saving energy is enhanced.
由上揭實施例顯示得知，本創作之最大特色係用線圈20產生的磁力改變鐵心30的位置，而磁力線具有走最短路徑之特性，因此，同時也改變永久磁鐵50的磁路，若不再加反向線圈磁力，則鐵心30會因永久磁鐵50的磁力而保持在那位置上。 As shown in the above embodiment, the greatest feature of the present invention is that the magnetic force generated by the coil 20 changes the position of the core 30, and the magnetic lines of force have the characteristics of taking the shortest path, and therefore also changes the magnetic circuit of the permanent magnet 50, if not When the reverse coil magnetic force is applied, the core 30 is held at that position by the magnetic force of the permanent magnet 50.
至於，本創作激磁開啟之驅動電路40，係可如圖2A、2B所示，將其裝設在外殼10側邊之適當處，或是依需求獨立裝設，再將其電源輸出線41與線圈20接通，其開啟電源時係輸出一正脈衝電壓，當關閉電源後產生一放電電流而輸出一負脈衝電壓，利用此一瞬間的正或負脈衝電壓，提供該線圈20完成激磁改變磁力方向，俾對該鐵心30產生推力或拉力使其位移，並迫使該永久磁鐵50變換磁路，使該鐵心30常態保持於預定位置。惟，驅動電路40之充、放電原理及架構係為先前技術，容不贅述。 As for the driving circuit 40 of the present invention, the driving circuit 40 can be installed at the appropriate side of the casing 10 as shown in FIG. 2A and FIG. 2B, or separately installed according to requirements, and then the power output line 41 and The coil 20 is turned on, and when the power is turned on, a positive pulse voltage is output. When the power is turned off, a discharge current is generated to output a negative pulse voltage, and the positive or negative pulse voltage of the moment is used to provide the coil 20 to complete the excitation to change the magnetic force. In the direction, the core 30 generates a thrust or a pulling force to displace it, and forces the permanent magnet 50 to change the magnetic circuit to maintain the core 30 in a predetermined position. However, the charging and discharging principle and architecture of the driving circuit 40 are prior art and will not be described.
圖4A、4B係本創作為電磁閥90A型態之一使用狀態圖，該第二側邊12更包括連接一閥體80，該閥體80相對於該鐵心30之右側面32，設有一氣室82，該氣室82分別與一進氣口81與一出氣口83連通，且該鐵心30之右側面32右推時係可頂抵封閉該進氣口81，如圖4A所示。又如圖4B所示，當該鐵心30左推時，該進氣口81開啟，使得氣體進入該氣室82後，經由出氣口83導入預定之物件84(如圖8所示)，據以構成一電磁閥90A之使用型態。 4A and 4B are diagrams showing a state of use of the solenoid valve 90A. The second side 12 further includes a valve body 80. The valve body 80 is provided with a gas relative to the right side surface 32 of the core 30. The chamber 82 is in communication with an air inlet 81 and an air outlet 83, respectively, and the right side 32 of the core 30 is pushed up to close the air inlet 81 as shown in FIG. 4A. As shown in FIG. 4B, when the core 30 is pushed to the left, the air inlet 81 is opened, so that after the gas enters the air chamber 82, the predetermined object 84 is introduced through the air outlet 83 (as shown in FIG. 8). A type of use of a solenoid valve 90A is constructed.
再者，圖5A、5B、5C係本創作為電磁閥90A型態之另一種使用狀態圖，此種實施例是所謂的「兩位三口」，其係進一步在該鐵心30上設有一導氣口33，該導氣口33之入口端係與該氣室82連通。據此，圖5A係顯示該鐵心30之右側面32封閉該進氣口81，圖5B係顯示該進氣口81開啟，氣體進入該氣室82後，經由該出氣口83導入預定之一物件84；該物件84如果是屬於一種會排出氣體的結構，則必須如圖5C所示，將該物件84之排氣，再通過該出氣口83回流至該氣室82，經由該導氣口33之入口端，導入該鐵心30內之後，經由該柱體11a的軸向通孔11b(本實施例中該，通孔11b即可作為一排氣孔)，排氣至該第一側邊11外部，藉此，順利將物件84的氣體排出，是以，本創作之結構特別適用於這種「兩位三口」的電磁閥90A，其具有結構簡單但可靠度高，且沒有一般電磁閥之殘磁問題。當然，本創作可變換磁路之 磁鐵裝置90，除了適用在電磁閥90A之外，亦可是適用在繼電器等產品上，容不贅述。 5A, 5B, and 5C are another use state diagram of the solenoid valve 90A type. This embodiment is a so-called "two-position three-port", which further has a gas guide port on the core 30. 33. The inlet end of the air guiding port 33 is in communication with the air chamber 82. Accordingly, FIG. 5A shows that the right side surface 32 of the core 30 closes the air inlet 81, and FIG. 5B shows that the air inlet 81 is opened. After the gas enters the air chamber 82, the predetermined one of the objects is introduced through the air outlet 83. 84; if the object 84 belongs to a structure that can discharge gas, the object 84 must be exhausted through the gas outlet 83 to the gas chamber 82 through the air outlet 33, as shown in FIG. 5C. After the inlet end is introduced into the core 30, the axial through hole 11b of the column 11a (the through hole 11b can be used as a vent hole in the embodiment) is exhausted to the outside of the first side 11 Therefore, the gas of the object 84 is smoothly discharged, so that the structure of the present invention is particularly suitable for the "two-position three-port" solenoid valve 90A, which has a simple structure but high reliability, and has no residual of a general solenoid valve. Magnetic problem. Of course, this creation can change the magnetic circuit. The magnet device 90 is not limited to the solenoid valve 90A, and may be applied to products such as relays, and will not be described.
藉助上揭技術手段，本創作以一封閉之小型外推磁路(R)及一大型內推磁路(L)的雙磁路及單邊吸附固定之設計，藉由改變磁力方向，運用該永久磁鐵50的磁路改變及該彈簧70的輔助，即可使該鐵心30常態保持於預定位置，此種『雙磁路及單邊吸附固定』之構造，使其具有較大之自由行程，擴大產品使用範圍，更可在物件有誤差或損耗時，自動調整其行程，確保產品可靠度，具體且有效的解決了美國第6,246,131號專利中右側邊為一封閉結構107的問題點。再者，本創作能以較小的功率，即可達到改變固定位置，具有節省電能之功效增進。 By means of the above-mentioned technical means, the design uses a closed small extrapolation magnetic circuit (R) and a large internal magnetic circuit (L) dual magnetic circuit and single side adsorption fixed design, by changing the magnetic direction, the application The magnetic circuit of the permanent magnet 50 is changed and the spring 70 is assisted, so that the core 30 can be normally maintained at a predetermined position. The structure of the "double magnetic circuit and the single side adsorption fixed" has a large free travel. By expanding the range of product use, it is possible to automatically adjust the stroke of the object to ensure the reliability of the product, and to solve the problem of the closed structure 107 on the right side of the US Patent No. 6,246,131. Moreover, the creation can achieve a change in the fixed position with a small power, and the power saving effect is enhanced.
綜上所述，本創作所揭示之構造，為昔所無，且確能達到功效之增進，並具可供產業利用性，完全符合新型專利要件，祈請 鈞局核賜專利，以勵創新，無任德感。 In summary, the structure revealed by this creation is unprecedented, and it can achieve the improvement of efficacy, and it can be used for industrial utilization. It fully complies with the new patent requirements, and invites the bureau to grant patents to encourage innovation. There is no sense of morality.
惟，上述所揭露之圖式、說明，僅為本創作之較佳實施例，大凡熟悉此項技藝人士，依本案精神範疇所作之修飾或等效變化，仍應包括在本案申請專利範圍內。 However, the drawings and descriptions disclosed above are only preferred embodiments of the present invention, and modifications or equivalent changes made by those skilled in the art in accordance with the spirit of the present invention should still be included in the scope of the patent application.
10‧‧‧外殼 10‧‧‧ Shell
11‧‧‧第一側邊 11‧‧‧ first side
11a‧‧‧柱體 11a‧‧‧Cylinder
11b‧‧‧通孔 11b‧‧‧through hole
12‧‧‧第二側邊 12‧‧‧Second side
13‧‧‧吸持面 13‧‧‧ Holding surface
20‧‧‧線圈 20‧‧‧ coil
30‧‧‧鐵心 30‧‧‧ iron core
30R‧‧‧右段部 30R‧‧‧Right section
30L‧‧‧左段部 30L‧‧‧Left section
31‧‧‧左側面 31‧‧‧ left side
32‧‧‧右側面 32‧‧‧ right side
33‧‧‧凸緣體 33‧‧‧Flange body
40‧‧‧驅動電路 40‧‧‧Drive circuit
41‧‧‧電源輸出線 41‧‧‧Power output line
50‧‧‧永久磁鐵 50‧‧‧ permanent magnet
51‧‧‧第一型磁極 51‧‧‧First type magnetic pole
52‧‧‧第二型磁極 52‧‧‧Second type magnetic pole
53‧‧‧導磁環 53‧‧‧magnetic ring
60‧‧‧軸向管 60‧‧‧Axial tube
61‧‧‧開口 61‧‧‧ openings
70‧‧‧彈簧 70‧‧‧ Spring
80‧‧‧閥體 80‧‧‧ valve body
90‧‧‧磁鐵裝置 90‧‧‧Magnetic device
(R)‧‧‧小型外推磁路 (R)‧‧‧Small extrapolation magnetic circuit
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104216523U TWM525531U (en) | 2015-10-15 | 2015-10-15 | Magnet device with single fixed position to change magnetic circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104216523U TWM525531U (en) | 2015-10-15 | 2015-10-15 | Magnet device with single fixed position to change magnetic circuit |
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| Publication Number | Publication Date |
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| TWM525531U true TWM525531U (en) | 2016-07-11 |
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| TW104216523U TWM525531U (en) | 2015-10-15 | 2015-10-15 | Magnet device with single fixed position to change magnetic circuit |
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| TW (1) | TWM525531U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111150383A (en) * | 2020-02-17 | 2020-05-15 | 李芳芳 | Control valve and blood pressure measuring device |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111150383A (en) * | 2020-02-17 | 2020-05-15 | 李芳芳 | Control valve and blood pressure measuring device |
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