Card lock without a shaft capable of high heat transfer

Abstract

The present invention relates to a card lock without a shaft to be used for fixing electronic circuit boards that can be easily disassembled and installed in the device where they are used by allowing heat transfer. The present invention aims to develop a design that will maximize the heat transfer surfaces and the cross-sectional areas where heat transfer is provided between the electronic card compression parts. The invention also aims to improve the elements that increase the contact surface between the electronic card cooling plate where the heat is transferred with the on-body discharges and the slot surfaces on the device body where the card is mounted. It is aimed to develop routers and channels that will enable the moving parts to make their movements parallel / linear.

Description

[0001] DESCRIPTION

[0002] CARD LOCK WITHOUT A SHAFT CAPABLE OF HIGH HEAT TRANSFER

[0003] Technical Field

[0004] The present invention relates to a card lock without a shaft to be used for fixing easily detachable electronic circuit boards to the device where it is used by allowing heat transfer.

[0005] Background

[0006] Transmission-cooled electronic circuit board modules are cooled by transferring the heat of the heat emitting components on the card to a cooling plate mounted on the card and transferring this heat to the device body where the circuit board module is mounted by transferring it through the cooling plate. Electronic circuit board modules are fixed to the slot in the device body where they are mounted by means of a cooler plate or card locks mounted directly on the card. The transfer of the heat generated on the card to the device where it is cooled is provided through the card locks. Therefore, the thermal resistance of the card locks is one of the most important factors affecting the cooling of the card. Developments related to various card locks known today have been the subject of many patent applications.

[0007] Document US3845359A discloses a card lock comprising a spring with shape-shifting portions for pressing the slot and the card by compressing the card along a direction parallel to the slot in which it is to be mounted.

[0008] Document US4354770A discloses a card lock comprising parts that push each other by sliding in a body connected to the card by compressing the card along a direction parallel to the slot where it is to be mounted. As a result of the parts pushing each other, it was stated that one of them pressed the card slot as a result of sliding out of the body.

[0009] Documents US4318157A and US4819713A discloses card locks containing parts that push each other by moving on the shaft (guide rail) in the middle. It is stated that at least one of the pieces presses the card slot as a result of pushing each other. Also disclosed in document US4298904A is a card lock comprising parts that simultaneously slide in two directions perpendicular to the slot and press the slot in two directions if compressed.

[0010] Patent application TR2021 / 007408 provides compression with spacers located on a shaft and having two different directions of movement when compressed.

[0011] In all card compression equipment, the heat transfer is between the moving parts sliding on top of each other. Therefore, heat transfer gains efficiency in direct proportion to the contact surfaces of the parts in contact with each other and the cross-sectional area where the heat is transferred.

[0012] A new patent application US10182509B 1 discloses the invention of a card lock in which filled- section parts without shafts are clamped from contact surfaces in order to increase the heat transfer surface. When this patent application is examined, it is seen that the cross-sectional areas of the parts where heat transfer is provided are higher than traditional shaft locks, but the contact surfaces of the parts are reduced due to the clamping interfaces designed to connect the parts to each other. In addition, complex clamping interfaces cause production difficulty and cost increase.

[0013] Brief Description of the Invention

[0014] The present invention aims to develop a design that will maximize the heat transfer surfaces and the cross-sectional area of the lock parts that carry the heat by contacting each other in order to reduce the thermal resistance of a card lock that compresses an electronic circuit board. In order to increase the cross-sectional area and contact surfaces, it is aimed to develop a body with channels that hold the lock parts together and guide the movement of the lock parts due to the fact that the shaft used in traditional locks is not used in the present invention. The invention also aims to develop the necessary elements to provide wider contact surfaces in the regions where the heat transferring lock parts contact the heat transferring card slot surfaces.

[0015] Definitions of Figures Describing the Invention

[0016] Figures and related descriptions used to better explain the card lock without a shaft / mill developed by the invention are as follows. Figure- 1 A perspective view of the uncompressed state of a card lock according to the invention.

[0017] Figure-2 A perspective view of the uncompressed state of a card lock when only its body is exploded according to the invention.

[0018] Figure-3 A perspective view of the body and other parts of the uncompressed state of a card lock when exploded according to the invention.

[0019] Figure-4 A perspective view of the compressed state of a card lock according to the invention.

[0020] Figure-5 A perspective view of the body and other parts of the compressed state of a card lock when exploded according to the invention.

[0021] Figure-6 A perspective view from the bottom while the body and other parts of a card lock are exploded according to the invention.

[0022] Figure-7 A side view of the compressed version of a card lock according to the invention.

[0023] Figure-8 A side bottom view of the compressed state of a card lock according to the invention.

[0024] Figure-9 A view of the compressed state of a card lock without a side bottom body according to the invention.

[0025] Figure- 10 A view of the compressed version of a card lock according to the invention without a side body and in which the moving parts are numbered.

[0026] Figure-11 Fifth Figure of the prior art patent document US10182509B1.

[0027] Figure-12 Side view of an uncompressed version of a card lock according to the invention in which the body, bearing and screw seat are integrated / integral.

[0028] Figure- 13 Side view of an uncompressed version of a card lock according to the invention in which the body, bearing and screw seat are integrated / integral without the body.

[0029] Figure-14 Bottom side view of an uncompressed version of a card lock according to the invention in which the body, bearing and screw housing are integrated / integral.

[0030] Figure- 15 Bottom side view of an uncompressed version of a card lock according to the invention, in which the body, bearing and screw seat are integral / integral, without the body and the moving parts are numbered.

[0031] Figure-16 Top perspective view of a card lock according to the invention in which the body, housing and screw housing are integrated / integral, showing the integrated state of the body, bearing and screw housing. Figure-17 Top perspective view of a card lock according to the invention in which the body, bearing and screw housing are integrated / integral, showing only the body and screw.

[0032] Figure- 18 Perspective view showing the use of a card lock according to the invention during locking the card module into the slot in the device to which it is mounted.

[0033] Figure- 19 Perspective view of the card module in which a card lock according to the invention is used, showing its use without one of the device slots in which it is inserted.

[0034] Figure-20 Perspective view of the card module in which a card lock according to the invention is used, showing its use without one of the cooling plate and device slots.

[0035] The elements shown in the figures are numbered and their corresponding numbers are as follows.

[0036] 1. Card lock

[0037] 2. Body

[0038] 3. Bearing

[0039] 4. Screw slot

[0040] 5. Pusher

[0041] 6. Middle wedge

[0042] 7. Last compressing wedge

[0043] 8. First compressing wedge

[0044] 9. Screw

[0045] 10. Pusher channel

[0046] 11. Middle wedge channel

[0047] 12. First compressing wedge channel

[0048] 13. Last compressing wedge channel

[0049] 14. Bearing fixer

[0050] 15. Screw slot fixer

[0051] 16. Channel pin

[0052] 17. Body connector

[0053] 18. Flange

[0054] 19. Slit

[0055] 20. Washer

[0056] 21. Stop wedge

[0057] 22. Slot 23. Card Module

[0058] 24. Cooling plate

[0059] 25. Electronic circuit board

[0060] Detailed Description of the Invention

[0061] The single compressing wedge application of the invention is described below (not shown in the figures).

[0062] The card lock (1), which is the subject of the invention, basically comprises a screw slot (4), pusher (5), first compressing wedge (8) and a bearing (3) sequentially arranged between the body (2) with two parallel plates. The screw slot (4) is a part with a hole in the middle. A relatively long screw (9) passes through this screw slot (4) and protrudes and is screwed into the pusher (5). With the rotations of the screw (9), the pusher (5) can get closer to and away from the screw slot (4). The movements of all other parts are thanks to the push-pull movements provided by this screw (9) on the pusher (5). A ring is placed in a ring groove on the screw (9) in order to prevent the screw (9) from leaving the screw slot (4) while under load.

[0063] All parts move in the middle of the channel-shaped body (2) formed by two parallel plates in order to meet the rotational moment created by the rotations of the screw (9) on the other parts and to make the movement linear. Thanks to this structure of the body (2), the screw slot (4) and the pusher (5), which are opened with the rotation of the screw (9), will move away from each other without skewing.

[0064] The screw slot (4) is fixed to the body (2) thanks to the screw slot fixers (15) in order for the movements in the body (2) to be only in a certain direction. The screw slot fixers (15) can be a machine element such as a pin, rivet, wedge, etc. The body (2) consists of two parallel plates as mentioned above. These plates can be connected to each other with body connectors (17) to form a whole or they can be separate. In fact, the body (2) is made of a single plate instead of two and can perform its function by supporting / contacting all other parts against skewing.

[0065] The body (2) may be formed by connecting the integral / integral or separated parts with the body connectors (17), which ensure that the two parallel plates, single plates or sections are "U" shaped. In any case, it will be able to perform the task of moving all moving parts on the body (2) in a certain direction and fixing the stable parts.

[0066] The first part fixed on the body (2) is the abovementioned screw slot (4). The screw slot fixers (15) enable the screw slot (4) to be fixed to one end of the body (2), which is a linear part. The pusher (5), which is pushed and pulled by the turns of the screw (9), is pushed, and pulled into the linear body (2). During this pushing and pulling, the pusher (5) is expected not only not to rotate / skew but also to move linearly. For this purpose, the pusher channel (10) and channel pins (16) formed on the plate(s) of the body (2) will perform the guiding function.

[0067] The channel pins (16) fixed on the pusher (5) and protruding from the side(s) fit into the pusher channel (10) opened on the body (2). The pusher channel (10) is a slit in the same direction (d) as the screw (9). In this way, the pusher (5) will move back and forth only in this direction (d) with the push provided by the screw (9).

[0068] Another part fixed on the body (2) is the bearing (3). It maintains its position at another end of the linear body (2) thanks to the bearing fixer (14). Both the pusher (5) and the bearing (3) are prismatic parts. There is an angled contact surface (k) on both parts. These surfaces (k) approach each other during the movement of the pusher (5) towards the bearing (3) thanks to the screw (9).

[0069] The first compressing wedge (8), which is the contact surfaces parallel to the planes formed by the contact surfaces (k), is positioned between the pusher (5) and the bearing (3). With the movement of the pusher (5) towards the first compressing wedge (8), the first compressing wedge (8) will be translated out of the direction (d) due to the contact surface (k), which is an angled surface. The same translation movement will also occur during the sliding of the angled contact surfaces (k) on each other during the approach of the first compressing wedge (8) to the bearing (3).

[0070] This movement, which starts with the movement of the screw (9) and results in the first compressing wedge (8) turning out between the two contact surfaces (k) and moving away from the centerline (d) and the body (2), increases the height of the card lock (1). As seen many times in the prior art, the first compressing wedge (8), the bearing (3) and the pusher (5) move on a shaft while their insides include a hole or channel opening. Since the contact surfaces (k) of the wedge, bearing and pusher that provide heat transfer between the device body / slot (22) and the card module (23) and the cross-sectional areas where the heat flow is provided are smaller than the cross-sectional parts that do not have an opening (fully filled) due to these openings, the thermal resistance of the card lock is high and therefore the heat transfer performance is low.

[0071] The card lock (1) of the invention does not contain a shaft. Thanks to the absence of a shaft, the first compressing wedge (8), bearing (3) and pusher (5), all of which are made of solid filled material, will be able to provide heat transfer with low thermal resistance thanks to these filled opening, and since the contact surfaces (k) area is high, the heat transfer between the contact surfaces will be provided at the highest level.

[0072] During the translation of the first compressing wedge (8) only over the contact surfaces (k), help is received from the body (2) since there is no shaft to prevent it from moving away from the card lock (1). The channel pins (16) moving in the first compressing wedge channel (12) on the body (2) are fixed on the first compressing wedge (8). Unlike the pusher channel (10), the first compressing wedge channel (12) is not a slit opened from the same direction as the direction (d).

[0073] The first compressing wedge (8) is translated out while being compressed on the angled contact surface (k) of the fixed bearing (3) and the angled contact surface (k) of the movable pusher (5). During these movements, the first compressing wedge (8) moves both towards the bearing (3) and outwards. Meanwhile, the angle made by the contact surface (k) planes of the first compressing wedge (8) with the direction (d) will follow a movement path at the same angle as "a". For this reason, the direction of the first compressing wedge channel (12) on the body (2) is also kept at the same angle "a" as the direction of the body (2). In this way, the first compressing wedge (8) will extend outwards parallel to the body (2) while translating outwards.

[0074] Two compressing wedges of the invention are described below. (Figures 1-10. belong to two compressing wedge card locks (1)) There is a first compressing wedge (8) and a final compressing wedge (7) on the body (2) in the two compressing wedge applications of the invention, which are different from a single compressing wedge card lock (1). In this application, the first compressing wedge (8) is first translated as a result of pushing the pusher (5) by means of the screw (9). A middle wedge (6) between the first compressing wedge (8) and the last compressing wedge (7) and in the body (2) moves along the direction (d) in the body (2) with the translation movement of the first compressing wedge (8).

[0075] As in the pusher (5), the middle wedge (6) is attached to the body (2) by means of the channel pin (16). Since the middle wedge channel (11) in which the middle wedge (6) moves in the channel pin (16) is a horizontal slit with respect to the body (2), it does not allow the middle wedge (6) to move away from the body (2) and the axis of movement (d).

[0076] Thanks to the fact that the surfaces of the middle wedge (6) facing the side of the bearing (3) and the pusher (5) are angled contact surfaces (k), both the last compressing wedge (7) that enters between the middle wedge (6) and the bearing (3) and the first compressing wedge (8) that enters between the middle wedge (6) and the pusher (5) are translated out of the movement axis (d) by the screw (9) compressing the pusher (5).

[0077] In a preferred embodiment of the invention, the first compressing wedge (8) and the last compressing wedge (7) are translated out by the same amount as the effect of the screw (9). However, this translation amount can be changed if desired by changing the angle "a" of the contact surfaces (k) with the direction (d). By changing the angle "a", the compression force applied to the device slot (22) where the card lock (1) is mounted also changes. In this way, customized applications of the card lock (1) can be made according to different needs and applications.

[0078] The amount of advance along the direction of the first compressing wedge (8) and the last compressing wedge (7) advanced against the amount of translation of the pusher (5) is not the same. Due to these translation differences, the first compressing wedge channel (12) and the last compressing wedge channel (13) have slits at different angles with the direction (d) in which the channel pins (16) move. The angle of the last compressing wedge channel (13) is "a" and the angle of the contact surfaces (k) is the same as "a", while the angle of the first compressing wedge channel (12) is "bn" and it is calculated by the below equation: tan tan (a) b„ = arctan ( - ) posn

[0079] In this equation, the value "n" indicates the number of parts moving towards the bearing (3). The last compressing wedge (7), which is located just in front of the bearing (3), is in the position KB and is shown in Figure 10 and Figure 15. The middle wedge (6) is in position) The first compressing wedge (8) is in position B Similarly, the pusher (5) is in the KB position. In addition to the two preferred compressing wedges of the card lock (1), more compressing wedges can also be applied. In this case, a middle wedge is added for each compressing wedge added. In this case, the position number of each horizontally and / or vertically moving part is continued by increasing the position number of the compressing wedge closest to the bearing (3) to be 1, as in the case of two compressing wedge card locks. Each compressing wedge channel angle "bn" is found by the same equation.

[0080] One or more pushers jammed between the screw (9) and the bearing (3), and the pusher (5) can all be translated out of the body (2) and the direction of movement (d) at the same time. If this translation is desired to take place equally and in parallel, the following should be provided: all contact surfaces (k) facing each other also have parallel surfaces, the angle of the channels of the compressing wedges carried by means of the channel pins (16) on the body (2) is at the angle of the contact surface (k) for the closest one to the bearing, the angle of the channels of the compressing wedges carried on the body (2) by means of the channel pins (16) and away from the bearing is found by using the" bn" contact surface (k) angle and the compressing wedge position value with the equation given above, opening slits on the body (2) where the compressing wedge channel pins (16) will move in all angle values.

[0081] Since the cross-sections of the cross-moving compressing wedges (7, 8) and all fixed or horizontally moving parts (3, 5 and 6) are not of hollow structure for shaft passage, they will contact each other from all of the contact surfaces (k), not with their thin walls. In this way, the thermal resistance of the card lock (1) will be lower than the prior art. In order to further reduce the thermal resistance between the card module (23) where the card lock (1) is used and the device body (22) where it is mounted, flanges (18) are added to all external surfaces that press in order to increase the surface areas where all parts (3, 5, 6, 7, 8) contact the card slot (22) in the device casing with the electronic circuit board cooling plate (24).

[0082] Another alternative embodiment of the invention is the form in which the body (2), the bearing (3) and the screw slot (4) are connected, and the body (2) is produced by emptying the filled material instead of the sheet metal and seen in Figure 12, Figure 14, Figure 16, and Figure 17. In this form, the pusher (5), the middle wedge (6), the last compressing wedge (7) and the first compressing wedge (8) are again horizontally or angularly movable in the body (2). These movements will move the pusher (5) and the middle wedge (6) horizontally according to the amount of translation made by the screw (9) and move the final compressing wedge (7) and the first compressing wedge (8) in an angular direction of the compound of the horizontal and vertical movement.

[0083] A slit (19) on the body (2) where the screw (9) is mounted to the body (2) ensures that the screw (9) can be easily attached to the body (2) thanks to its width. The screw (2) must be produced to include the stop wedge (21) in order for the screw (9) not to come out of the body (2) and the slit (19) under load. A washer (20) with a slit is used to facilitate assembly in order to prevent damage to the material and coating of the body (2) due to the friction to be formed on the surfaces where the stop wedge (21) contacts the body (2). As mentioned above, the screw (9) is a specially produced part. It does not have only a hex head and gears opened on the shaft. In addition, in the region close to the head, the screw was turned to the root diameter and a stop wedge (21) with a diameter larger than the screw thread diameter was formed between the place where the gears started. The washer (20) is stretched and passed to the lathed cylindrical part of the threads of the screw (9).

[0084] Thanks to the fact that the channel pins (16) protrude from the wedges (6, 7, 8) and enter the channels (11, 12, 13) on the body (2), the wedges (6, 7, 8) placed to move in certain directions in the body (2) for shaft passage will transfer heat to each other with low thermal resistance due to the fact that the cross-sectional areas are at the highest limit and the contact surfaces cover the entire section.

Claims

CLAIMS1. A card lock (1) for use in fixing electronic circuit boards which can be easily removed and installed in the device in which they are used, by allowing heat transfer; comprising a screw slot (4), pusher (5), first compressing wedge (8) and a bearing (3) sequentially arranged between the body (2) having two parallel plates; characterized by a screw (9), which passes through the screw slot (4) and comes out and is screwed to the pusher (5), a pusher (5) that can move closer to and further away from the screw slot (4) with the turns of the screw (9), a channel-shaped body (2) in which all the parts are formed by two parallel plates and moved in the middle to compensate for the rotational moment created by the rotations on the other parts and to make the movement linear, a screw slot fixer (15) and the bearing fixer (14), which enable the screw slot (4) and the bearing (3) to be fixed to the body, the channel pins (16) moving in the last compressing wedge channel (13) disposed at the angle "a" on the body (2) for translating the last compressing wedge (7) out over the angled contact surfaces (k).

2. A card lock (1) according to claim 1, characterized by a first compressing wedge channel (12) having a value bnwherein in order for the last compressing wedge (7) as well as the first compressing wedge (8) to be displaced outward by the same amount under the influence of the screw (9), when the angle of the last compressing wedge channel (13) is “a”, the value of “bn”, the angle of the first compactor wedge channel (12), is obtained according to the following equation: tan tan (a) b„ = arctan ( - ) posn3. A card lock (1) according to claim 1 or 2, characterized by a stop wedge that can be inserted into the body (2) through a slit (19) on the body (2) for mounting the screw (9) in the body (2) and on which the screw (2) rests so that the screw (9) does not come out of the body (2) and the slit (19) when under load.

4. A card lock (1) according to claim 3, characterized by a washer with a slit used during assembly to prevent damage due to friction on the surfaces where the stop wedge contacts the body (2).

5. A card lock (1) characterized in that the cross-sectional areas are at the highest limit and the contact surfaces cover the whole of this section, and in order to show low thermal resistance to each other during heat transfer, the channel pins (16) and wedges (6, 7, 8) enter the channels (11, 12, 13) on the body (2) and placed wedges (6, 7, 8) to allow movement in the body (2) without emptying inside.

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